Underpinning is the extension of the existing foundation down to competent bearing material, which is material that will support the weight of the house and foundation without settling. Techniques include installing reinforced concrete piers, driven steel piles or push piles, hand-dug pits, helical anchors or self-drilling anchors.
Underpinning helps stabilize the foundation, and is often necessary as first step to a major home remodel.

Underpinning is often an excellent solution to level floors, stop the foundation from moving, lift the home close to it’s orginal position, and greatly increase the value of your home.

RWR uses portable equipment during installation, with minimal disruption to your home and surrounding area.

Schedule a free inspection with one of our professional consultants, and get our recommendations for your situation.

Here is an example estimate from RWR, so you can get an idea of the detail and professionalism you can expect from our team of specialists.

This estimate is based on a site visit and structural drawings. The scope of work is for demo, excavation, installation of underpinning piers/haunches, installing dowels and grade beams and foundation drain. Included is an allowance for reinstalling the stair and deck. The price includes all labor and material to complete the work as per the itemized Scope of Work below.
Scope of Work

Mobilization and Layout
• Mobilize to jobsite with necessary equipment to complete job (See qualifications and clarifications)
• Layout underpinning piers per plans and specifications
• Daily Cleanup
• Final Cleanup

Demo and Shore Existing Structure
• Saw cut approximately 18 ft of driveway in front of garage and remove concrete from driveway across front of garage approximately 1 ft out. Where haunch is located remove approximately 2 ft x 2 ft. of additional concrete driveway.
• Demo and remove concrete stairs and deck as required
• Demo and remove concrete wall and pad on North side of house (Spa heater to be removed by others prior to demo of pad).
• Off haul debris from site
• Shore North side deck existing structure to allow for installation of new pier supports using RWR designed shoring method.

Excavation and Off Haul
• Excavate for underpinning haunches per plans and specifications (1/S1, 3/S1 and 4/S1).
• Excavate for installation of tie beam next to foundation per plans and specifications 2/S1.
• Off haul spoils from site.

Concrete Reinforced Piers
• Drill twelve (12) 18” diameter holes x 15 ft maximum with portable drilling equipment per plans and specifications S1. Final depths to be determined by soils engineer. See drilling condition exclusions.
• Install twelve (12) 18” diameter concrete reinforced piers x 15 ft per plans and specifications.
• Off haul pier spoils from site.

Haunches and Tie beams
• Install approximately 80 dowels using Hilti HY 150 two part adhesive anchor system per plans and specifications
• Install rebar and concrete into haunch excavation per plans and specifications 1/S1, 3/S1 and 4/S1.
• Install rebar and concrete into 1 ft x 1 ft tie beam excavation 1/S1, 2/S1, 3/S1 and 4/S1.

Backfill
• Backfill all exterior concrete work as required by plans and specifications.

Repair Stairs and Side Deck
• Using existing 4×4 posts reinstall existing posts using galvanized CBSQ44 brackets and attach posts per plans and specifications.
• Install new wooden stairway and deck to replace removed concrete stairs in front of house.
Does not include paint or paint labor. Price does not include rebuilding of structural stair support if necessary. Upon removal of concrete stairs engineer will approve structural integrity of stair and deck support. Stairs and deck are over living space. This will require installation of new waterproofing. RWR will engage a subcontractor to install waterproofing prior to installation of new wooden stairs. Price does not include this additional cost of waterproofing or any type of flashing that may be required.

Drainage
• Trench approximately 50 linear ft in crawl space of house to install foundation drain per plans and specifications.
• Install approximately 50 linear ft of perforated SDR 35 pipe with cleanouts as necessary along foundation per plans and specifications 6/S1.
• Trench is to be a minimum of 12 in wide x 12 in below crawl space grades
• Trench will be lined with filter fabric and filled with ¾ in drain rock.
• Include a tight line to surface drain drop inlet and exit to outside.
• Discharge perforated pipe to tight pipe on the exterior into existing drainage outlet per plans and specifications.
Alternative #1
• In lieu of demo concrete stairs and replacing with wood stairs the pier located under the stair way would be relocated to the exterior of the house (This has been approved by the engineer).
• The haunch for detail 4/S1 would be redesigned with larger rebar (subject to calculation and detail provided by engineer).
• Excavation would occur in interior of home. Demo sheetrock in closet for access under stairway.
• Excavate haunch per plans and specifications with spoils removed through downstairs window.
• Repair sheetrock as required (does not include paint).
(Note: Price difference is greater than shown as waterproofing will not be required with alternative)

Qualifications and Clarifications
• Job is bid as package unless agreement to otherwise
• Includes one mobilization only
• Prices are subject to RWR obtaining adequate supply of wood, steel, rock, concrete, asphalt, PVC resins, PVC pipe, fittings at prices quoted at bid time and are good for 30 days.
• Proposal is based on working std 40 hours per week, 5 work days and mutually agreeable schedules.
• RWR is not responsible for survey lines. Survey of property lines must be done by licensed surveyor.
• Progress payments every two weeks.
• Estimate does not include replacement of landscaping. RWR will remove landscape material as directed by homeowner for future replacement by others.

 
Exclusions
• Cost of plans, permits, bonds, testing and inspections.
• Increased cost of drilling or excavation due to hard rock, underground water or caving soils. (Hard rock drilling is defined as a penetration rate slower than 1 ft. in 5 minutes.) (Hard rock excavation is defined as material that cannot be excavated with a conventional backhoe or excavator bucket.)
• Any additional work required as a result of utilities including buried pipes or irrigation pipes.
• Replacement of damaged landscaping, driveway or fence.
• Excavation and off hauling of hazardous materials, underground tanks, or materials unacceptable at dumps.
• Any work related to landscaping, fences or gates except as outlined
• Additional drainage not specifically outlined in this proposal.
• Earth shoring
• Winterization erosion control items (to be completed on a Time and Material basis if required)
• Electrical or Plumbing except as outlined in this proposal
• Backfill or Compaction of any soils not outlined in this proposal.
• Importation of backfill material except as noted.
• Survey of property lines
• Landscaping or irrigation

Underpinning is the extension of the existing foundation down to competent bearing material, which is material that will support the weight of the house and foundation without settling. Techniques include installing reinforced concrete piers, driven steel piles or push piles, hand-dug pits, helical anchors or self-drilling anchors.
Underpinning helps stabilize the foundation, and is often necessary as first step to a major home remodel.

Underpinning is often an excellent solution to level floors, stop the foundation from moving, lift the home close to it’s orginal position, and greatly increase the value of your home.

RWR uses portable equipment during installation, with minimal disruption to your home and surrounding area.

Schedule a free inspection with one of our professional consultants, and get our recommendations for your situation.

Here is an example estimate from RWR, so you can get an idea of the detail and professionalism you can expect from our team of specialists.

This estimate is based on drawings. The proposal consists of performing structural underpinning/replacement repairs to the existing deck and house foundation as per plans as well as the replacement of the existing wooden deck replacement as separately proposed below.
Scope of Work
I. – Foundation Underpinning A-S2 BASE BID
• Mobilize to jobsite. Demobilize.
• Supervision.
• Remove existing wooden deck and off-haul debris from site (see notes below).
• Install combination of post, driven pipe pile and crib towers with temporary beams to support main floor of house @ the dining area. Remove shoring system after house is re-supported on new perimeter and interior foundations. (Re-leveling not included in this base bid, see additional cost provided below).
• Drill and install a total of: (1) 24” diameter x 14 ft deep, (1) 24” diameter x 22 ft deep, (1) 18” diameter x 14 ft deep, (1) 18” diameter x 16 ft deep and (1) 18” diameter x 17 ft deep reinforced concrete piers as per sheet S2 layout and structural details on sheets S2, S3 & S4. Remove drilling spoils from site.
• Excavate for and install new reinforced concrete grade beams, tie beams and pier caps as per plans. Includes drilling and installing epoxy dowels to tie new to existing foundations.
• Off-haul related spoils from site.
• Re-install underpinning area 6×6 posts and 1212HT straps below the dining area as per plans as well as (2) deck supports and all other embedments related to the future re-construction of the new wooden deck (see additional price provided below).
• Install drainage system as shown on drawings.
• Clean up site and remove RWR construction debris from site.

Alternate Bid Work Scope I
Wooden Deck Replacement
• This alternate must be performed at the same mobilization as “main bid scope”.
• Replace existing wooden deck (to same shape/form) per structural details provided using pressure treated lumber for the framing structure, Simpson brackets CC66 and attachments as per plans, 2×10 joist for framing and Con hart B (higher grade) redwood lumber for finish product on decking materials, railing, wooden landing and stairs.

Alternate Bid Work Scope II
Entry Replacement S5
• This alternate must be performed at the same mobilization as “main bid scope”.
• Replace entry side deck per instructions on sheet S5.

Construction Notes:
• Existing wooden deck is assumed to be completely demolished to avoid performing additional structural shoring operations. If needed, sections of the wooden deck can be removed for the installation of the new concrete foundations while the deck replacement permits are in process. Shoring scheme outlined above (base bid) is included for dining area of the existing living space area of the house structure only.
• Due to temporary shoring installation under the existing house (living space/dining area/ceramic floor) structure, installation/removal of shoring may result in cracked walls, cracked floors, uneven floors finishes as well as other cosmetic damages. RWR is not including repair of same in this estimate and will not be responsible for such items.

Qualifications and Clarifications
• Job is bid as package unless agreement to otherwise.
• Itemized prices are provided for illustrative purposes only and are not self supporting.
• Includes one mobilization only.
• Prices are subject to adequate supply of rock, concrete, asphalt, PVC resins, PVC pipe, fittings at prices quoted at bid time and are good for 30 days.
• Proposal is based on working std 40 hours per week, 5 work days and mutually agreeable schedules.
• Progress payments every two weeks.

Exclusions
• Cost of plans, permits, bonds, testing and inspections.
• Increased costs of excavation or drilling due to hard rock, underground water or caving. (Hard rock drilling is defined as a penetration rate slower than 1ft. in 5 minutes). (Hard rock excavation is defined as material that requires the use of a pneumatic or hydraulic breaker to excavate).
• Hardscaping or landscaping work.
• Any work on existing utilities including buried pipes.
• Waterproofing.
• Erosion control.
• Drainage work.
• Winterization.
• Excavation of hazardous materials, underground tanks, or materials unacceptable at dumps.
• Architectural concrete or type of special concrete finish product.

Underpinning is the extension of the existing foundation down to competent bearing material, which is material that will support the weight of the house and foundation without settling. Techniques include installing reinforced concrete piers, driven steel piles or push piles, hand-dug pits, helical anchors or self-drilling anchors.
Underpinning helps stabilize the foundation, and is often necessary as first step to a major home remodel.

Underpinning is often an excellent solution to level floors, stop the foundation from moving, lift the home close to it’s orginal position, and greatly increase the value of your home.

RWR uses portable equipment during installation, with minimal disruption to your home and surrounding area.

Schedule a free inspection with one of our professional consultants, and get our recommendations for your situation.

Here is an example estimate from RWR, so you can get an idea of the detail and professionalism you can expect from our team of specialists.

This estimate is based on (1) 8 ½ x 11” structural sheet “Foundation Repair”. And is for the installation of (3) new reinforced concrete interior piers/columns and the underpinning of a section of the existing foundation.

Our price includes all labor and material to complete the job as per the itemized Scope of Work below.

Scope of Work
• Mobilize to site.
• Install temporary shoring at the existing line of piers so existing failing piers can be removed.
• Remove (3) existing concrete failing piers completely and off-haul concrete debris from site.
• Set laser lines under the pier line area and determine if floor can be adjusted to level desired.
• Excavate and install (3) reinforced concrete piers (Instead of trying to underpin) including (3) new 4 x 4 posts and post bases. Off-haul spoils from site.
• Excavate and install (1) reinforced concrete underpinning section at perimeter wall approx. 7 ft. long x 2 ft. wide x 1 ft deep as per detail B. Off-haul spoils from site
• Clean up site and construction debris.

Notes
• It may not be possible to re-level affected area within specified tolerances (½ of an inch maximum) due to existing conditions, such as “permanent set” in joists, etc.
• Re-leveling the affected area is included, however due to the floor area all ready adjusted to the existing conditions may result in cracked walls, cracked floors, uneven floors finishes as well as other damages.
• If bottom of foundation is deeper than 2ft. below existing grade, will charge additional cost for excavation, tie beam and haunch construction.
• All existing ducts and furnace to be removed (By homeowner) prior to start the job.
• The job will be started one week after the contract is signed.
• The length of the project is approx. 7 to 8 working days.
• Homeowners do not have to vacate house during or after construction.
• Homeowner takes care of all permit issues.

Exclusions
• Cost of plans, permits, bonds, testing and inspections.
• Increased costs of excavation due to hard rock, underground water or caving. (Hard rock excavation is defined as material that requires the use of a pneumatic or hydraulic breaker to excavate)
• Any work on utilities including buried pipes.
• Repair to landscaping or irrigation.

Underpinning is the extension of the existing foundation down to competent bearing material, which is material that will support the weight of the house and foundation without settling. Techniques include installing reinforced concrete piers, driven steel piles or push piles, hand-dug pits, helical anchors or self-drilling anchors.
Underpinning helps stabilize the foundation, and is often necessary as first step to a major home remodel.

Underpinning is often an excellent solution to level floors, stop the foundation from moving, lift the home close to it’s orginal position, and greatly increase the value of your home.

RWR uses portable equipment during installation, with minimal disruption to your home and surrounding area.

Schedule a free inspection with one of our professional consultants, and get our recommendations for your situation.

Here is an example estimate from RWR, so you can get an idea of the detail and professionalism you can expect from our team of specialists.

This estimate is based on architectural drawings, structural drawings and landscaping drawings. The bid consists of installing selective structural concrete work as shown on revised plans plus selective miscellaneous drainage, hard demolition and excavation work.

Our price includes all labor and material to complete the job as per the itemized “Scope of Work” below.

Scope of Work
Selective Concrete Work + Miscelaneous
• Mobilize to jobsite. Demobilize. Supervision.
• Provide selective hard demolition specifically and only for the installation of the new concrete work as shown on the revised drawings. Demolition or removal of buried concrete structures or hidden conditions are not included as well as underpinning of existing structures. Includes demolition and removal of brick patio as well as extracting the planters existing soil for waterproofing installation (by others).
• Excavate for and install (3) AD’s per sheet L2.0 and connect to existing outlet per note #4.
• For the north side yard of the house, excavate for and install new reinforced concrete grade beams as indicated on layout A & D of S2.1 as well as (1) new reinforced concrete pad for the heat pumps as shown on A2.1 (entry landing not included). Includes epoxy dowels to attach new to existing foundations where applicable.
• Clean-up site and remove all construction debris and excess soils.

Qualifications and Clarifications
• Job is bid as package unless agreement to otherwise
• Includes one mobilization only.
• Prices are subject to adequate supply of rock, concrete, asphalt, PVC resins, PVC pipe, fittings at prices quoted at bid time and are good for 30 days.
• Proposal is based on working std 40 hours per week, 5 work days and mutually agreeable schedules.
• Elevations and layout to be provided by General Contractor performing the remainder of the project.
Exclusions
• Cost of plans, permits, shop drawings, bonds, testing and inspections.
• Increased costs of excavation or drilling due to hard rock, caving or underground water. (Hard rock excavation is defined as material that requires the use of pneumatically or hydraulically operated hammers or rams to excavate.) (Hard rock drilling is defined as a penetration rate slower than 1 ft. in 5 minutes.)
• Any work on utilities including buried pipes.
• Waterproofing or drainage work other than mentioned in our scope of work.
• Soft demolition or any demolition not related to concrete installation scope of work mentioned above.
• Stone removal, concrete work not obstructing the installation of the new concrete work.
• Tree work, protection etc
• Erosion control.
• Underpinning, structural or earth shoring.
• Winterization.
• Excavation of hazardous materials, underground tanks, or materials unacceptable at dumps.
• Architectural concrete or type of special concrete finish product.
• Surveying and Layout.

Underpinning is the extension of the existing foundation down to competent bearing material, which is material that will support the weight of the house and foundation without settling. Techniques include installing reinforced concrete piers, driven steel piles or push piles, hand-dug pits, helical anchors or self-drilling anchors.
Underpinning helps stabilize the foundation, and is often necessary as first step to a major home remodel.

Underpinning is often an excellent solution to level floors, stop the foundation from moving, lift the home close to it’s orginal position, and greatly increase the value of your home.

RWR uses portable equipment during installation, with minimal disruption to your home and surrounding area.

Schedule a free inspection with one of our professional consultants, and get our recommendations for your situation.

Here is an example estimate from RWR, so you can get an idea of the detail and professionalism you can expect from our team of specialists.

This preliminary estimate is based on Preliminary Structural Drawings. The scope of work includes drilling and installing concrete reinforced piers, excavating and installing concrete reinforced underpinning haunches. An alternative for an extension along with additional piers for the garage are provided. Final price is subject to receipt of final plans. Our price includes all labor and material to complete the work as per the itemized Scope of Work below.

Scope of Work

Mobilization and Layout
• Mobilize to jobsite with portable drilling equipment and other necessary equipment to complete
• Daily Cleanup
• Final Cleanup

Excavate for Underpinning Haunches
• Excavate for sixteen (16) underpinning haunches 3 ft x 2 ft x 3 ft.
• Dirt Spoils to remain on site
• Access through existing deck and slabs to be provided by others

Piers
• Drill sixteen (16) 18” diameter x a maximum of 17.5 ft in depth per plans and specifications. Final depths to be determined by soils engineer. No Deduct. See hard rock drilling conditions.
• Install sixteen (16) 18” diameter x a maximum of 17.5 ft in depth concrete reinforced piers per plan and specifications.
Concrete Reinforced Haunches
• Install sixteen (16) 3 ft x 2 ft x 3 ft concrete reinforced haunches per plans and specifications.
• Includes a maximum of 16 dowels into existing foundation per plans and specifications.

Note: This scope of work is for the house only and does not include the garage underpinning, addition to house or pool house. The work is for the underpinning only and does not include interior girders or any leveling of the existing structure.

Alternative #1

• Add three (3) piers and haunches for garage per plans and specifications

Alternative #2

• Add six (6) piers and 50 linear ft x 1.5 ft x 1.5 ft grade beam per plans and specifications

Note: This bid assumes it will be performing services as a Sub-contractor to a General Contractor. Bid assumes contract will utilize standard contractual provisions. It reserves the right to accept or reject General Contractor’s contractual provisions.
Qualifications and Clarifications
• Job is bid as package unless agreement to otherwise
• Includes one mobilization only
• Prices are subject to adequate supply of wood, steel, rock, concrete, and asphalt, PVC resins, PVC pipe, fittings at prices quoted at bid time and are good for 30 days.
• Proposal is based on working std 40 hours per week, 5 work days and mutually agreeable schedules.
• No Off haul. Dirt spoils to be retained on site.
• Demo and access to be provided by others
• Estimate is subject to receipt of final plans
Exclusions
• Cost of plans, permits, bonds, testing and inspections.
• Increased cost of drilling or excavation due to hard rock, underground water or caving soils. (Hard rock drilling is defined as a penetration rate slower than 1 ft. in 5 minutes.) (Hard rock excavation is defined as material that cannot be excavated with a conventional backhoe or excavator bucket.)
• Any work on utilities including buried pipes or irrigation pipes.
• Replacement of damaged landscaping.
• Excavation and off hauling of hazardous materials, underground tanks, or materials unacceptable at dumps including serpentine rock.
• Drainage
• Importation of backfill material except as noted.
• Electrical and Plumbing
• Carpentry except that required for installation of concrete
• Other work on preliminary plans not included in our scope of work above

Underpinning is the extension of the existing foundation down to competent bearing material, which is material that will support the weight of the house and foundation without settling. Techniques include installing reinforced concrete piers, driven steel piles or push piles, hand-dug pits, helical anchors or self-drilling anchors.
Underpinning helps stabilize the foundation, and is often necessary as first step to a major home remodel.

Underpinning is often an excellent solution to level floors, stop the foundation from moving, lift the home close to it’s orginal position, and greatly increase the value of your home.

RWR uses portable equipment during installation, with minimal disruption to your home and surrounding area.

Schedule a free inspection with one of our professional consultants, and get our recommendations for your situation.

Here is an example estimate from RWR, so you can get an idea of the detail and professionalism you can expect from our team of specialists.

This estimate is based on architectural and structural drawings. The bid is for the repairs to the existing foundation as per plans.

Our price includes all labor and material to complete the work as per the itemized Scope of Work below.

Scope of Work
• Mobilize to jobsite.
• Supervision.
• Saw-cut and demolish (9) square sections approx. 4 ft. wide x 4 ft. long as indicated on structural plans. Off-haul demolition debris from site.
• Excavate (9) access pits to maximum depths (As per detail A/S5.1) to expose the tip of the existing concrete piles as per plans. Off-haul excavation spoils from site.
• Roughen the surface of the existing piles and clean surface for bonding as per plans.
• Sever (If needed) the existing connection between the pile and the bottom of the existing grade beams prior to re-leveling.
• Install (9) reinforced concrete underpinning/pier caps (First pour as per detail A/S5.1) to plan depths. Two pier caps inside the garage as per detail 3 A&B from sheet S/5.1.
• Install hydraulic jacks and re-level as per structural engineering’s instructions (See notes and exclusions). Remove hydraulic jacks and install sacrificial jacks to support the existing foundation as per detail A/S5.1. (If sacrificial jacks are not used then contractor will place high strength grout to provide full bearing after re-leveling is completed).
• Install the rest of the reinforced concrete underpinning/pier caps (Second pour as per detail B/S5.1). Two pier caps inside the garage as per detail 3 A&B from sheet S/5.1.
• Patch slab openings as per new slabs requirements on page S1.1. (Where required).
• Fill voids between back patio and perimeter foundation with LDF lean concrete as instructed by General contractor.
• Clean up site and construction debris.

Notes
• It may not be possible to re-level affected area within specified tolerances (¼ of an inch maximum) due to existing conditions, such as “original pour conditions and final finishes”, etc.
• Re-leveling the affected area is included, however since the floor area has already adjusted to the existing conditions it may result in cracked walls, cracked floors, uneven floors finishes as well as other damages. Not including any repairs of same in this estimate.
• General contractor to remove furnace and any other obstacles to access work areas prior to commencing of the job.
• Exterior tile work to be completed by others.
• Excavations and concrete amounts are calculated to depths as per plan measurements, any additional depths will incur additional charges.
• Verification of final floor elevation and monitoring in conjunction with General Contractor.
• Contractor is not responsible for any damages to the adjacent unit due to the re-leveling or any other work to be performed at: 5 Flemings Court, Marin City.

Exclusions
• Cost of plans, permits, bonds, testing and inspections.
• Increased costs of excavation due to hard rock, underground water or caving. (Hard rock excavation is defined as material that requires the use of a pneumatic or hydraulic breaker to excavate).
• Soft demolition or any not mentioned above.
• Plastic covering and dust cleaning.
• Any carpentry work.
• Earth shoring.
• Exterior tile work.
• Cost of surveying and monitoring requirements.
• Any work on utilities including buried pipes.

Underpinning is the extension of the existing foundation down to competent bearing material, which is material that will support the weight of the house and foundation without settling. Techniques include installing reinforced concrete piers, driven steel piles or push piles, hand-dug pits, helical anchors or self-drilling anchors.
Underpinning helps stabilize the foundation, and is often necessary as first step to a major home remodel.

Underpinning is often an excellent solution to level floors, stop the foundation from moving, lift the home close to it’s orginal position, and greatly increase the value of your home.

RWR uses portable equipment during installation, with minimal disruption to your home and surrounding area.

Schedule a free inspection with one of our professional consultants, and get our recommendations for your situation.

Here is an example estimate from RWR, so you can get an idea of the detail and professionalism you can expect from our team of specialists.

This estimate is for mere reference and illustration only, based on Structural Shoring skims used in the past by contractor in similar job site situations/conditions and is subject to the revision and stamped approval of a Structural shoring engineer (Allowance has been provided below). Our price includes all labor and material to complete the work as per the itemized “Scope of Work” below.

Scope of Work
• Mobilize all necessary equipment and manpower to jobsite.
• Confirm Layout with General Contractor (Layout by General Contractor).
• Operations’ safety and on site supervision.
• Clean up related construction debris, staged materials and demobilize equipment.

Underpinning Excavation
• Excavate and dispose of soil in sequence for three new underpinning piers (two at 4.5ft long by 5 ft. deep by 2.5 ft wide maximum and one at 4.5 ft. long by 4 ft. deep by 2.5 ft wide maximum)
• All soil to be off-hauled from site.

Underpinning Reinforced Concrete
• In sequence place reinforcing steel, form and pour concrete for three new underpinning piers (two at 4.5ft long by 5 ft. deep by 2.5 ft wide maximum and one at 4.5 ft. long by 4 ft. deep by 2.5 ft wide maximum) as per plans.
• Preload and Drypack (if necessary or called by the engineer).

Unit Prices
• Additional Underpinning Haunch Installation Depth – add cost per ft. depth

Exclusions
• Cost of plans, permits, bonds, testing and inspections.
• Increased cost of drilling and excavation due to hard rock, underground water or caving soils. (Hard rock drilling is defined as a penetration rate slower than 1 ft. in 5 minutes or the use of a core barrel.) (See Attached drilling conditions) (Hard rock excavation is defined as material that cannot be excavated with a standard backhoe or excavator bucket, or if excavating by hand, material that cannot be excavated without a pneumatically powered jackhammer.)
• Any work on utilities including buried pipes.
• Layout of hubs and elevations.
• Carpentry/woodwork.
• Repair/replacement of damaged landscaping or hardscaping including and not limited to concrete sidewalks and asphalt street paving.

Underpinning is the extension of the existing foundation down to competent bearing material, which is material that will support the weight of the house and foundation without settling. Techniques include installing reinforced concrete piers, driven steel piles or push piles, hand-dug pits, helical anchors or self-drilling anchors.
Underpinning helps stabilize the foundation, and is often necessary as first step to a major home remodel.

Underpinning is often an excellent solution to level floors, stop the foundation from moving, lift the home close to it’s orginal position, and greatly increase the value of your home.

RWR uses portable equipment during installation, with minimal disruption to your home and surrounding area.

Schedule a free inspection with one of our professional consultants, and get our recommendations for your situation.

Here is an example estimate from RWR, so you can get an idea of the detail and professionalism you can expect from our team of specialists.

This estimate is based on structural plans prepared by Structural Engineer. The bid is for the installation of drilled cast-in-place reinforced concrete piers to stabilize the downhill side of the house as per plans.

Our price includes all labor and material to complete the job as per the itemized Scope of Work below.

Scope of Work
• Mobilize to site.
• Install a temporary chute for spoils off-hauling.
• Demolish and remove from site an existing wooden and concrete pathway as per plans. Remove debris from site.
• Drill and install (7) 18” diameter x 14 ft. deep maximum reinforced concrete piers along downhill side of house and to the northern side of the house foundation as per plans. Sequential installation is required. Off-haul spoils from site.
• Excavate for and install (4) 2 ft. wide x 4.5 ft. long x 1.5 ft. deep and (3) 2ft. wide x 3 ft. long x 1.5 ft. deep reinforced concrete pier caps under existing foundation that are connected to the top of the piers as per plans.
• Repair (4) existing foundation cracks with Simpson epoxy ETI-GV-22 injection as per manufacturers recommendations prior to exterior foundation work.
• Temporarily shore the northern house entry to replace the existing inadequate isolated support with a new reinforced concrete grade beam as per detail 6/S1. Includes a new section of framing cripple wall to tie to new upper structure as per plans.
• Excavate and install approx. 43 linear ft. of reinforced concrete grade beam along the exterior of the existing house foundation and a new walkway perimeter 6” thick concrete stem wall as per plans. Includes approx. (38) reinforced epoxy dowels to tie new to existing foundation and weep holes thru new foundation for water seepage as per plans.
• Backfill walkway area with ¾ crushed rock as per detail 3/S1 to cover a minimum of 4” over new underpinning haunches.
• Install drainage lines as per plans and a new drainage dissipator a maximum of 2 ft. wide x 3.5 ft. long x 2 ft. deep (detail not provided).
• Clean up site and remove construction debris from site.

Notes
• Homeowner’s permission to park drilling power pack at the exiting garage approach/entry for the duration of the drilling procedures is necessary.

Qualifications and Clarifications
• Job is bid as package unless agreement to otherwise
• Includes one mobilization only.
• Prices are subject to adequate supply of rock, concrete, asphalt, PVC resins, PVC pipe, fittings at prices quoted at bid time and are good for 30 days.
• Proposal is based on working std 40 hours per week, 5 work days and mutually agreeable schedules.
• Progress payments every two weeks.

Unit Prices
• Additional footage for drilled and installed piers
Exclusions
• Cost of plans, permits, bonds, testing and inspections.
• Increased costs of excavation or drilling due to hard rock, underground water or caving soils. (Hard rock drilling is defined as a penetration rate slower than 1ft. in 5 minutes). (Hard rock excavation is defined as material that requires the use of a pneumatic or hydraulic breaker to excavate).
• Any work on utilities including buried pipes.
• Removal of spoils from site not mentioned above.
• Structural/Earth shoring.
• Repair to landscaping or irrigation.
• Excavation of hazardous materials, underground tanks, or materials unacceptable at dumps.

Underpinning is the extension of the existing foundation down to competent bearing material, which is material that will support the weight of the house and foundation without settling. Techniques include installing reinforced concrete piers, driven steel piles or push piles, hand-dug pits, helical anchors or self-drilling anchors.
Underpinning helps stabilize the foundation, and is often necessary as first step to a major home remodel.

Underpinning is often an excellent solution to level floors, stop the foundation from moving, lift the home close to it’s orginal position, and greatly increase the value of your home.

RWR uses portable equipment during installation, with minimal disruption to your home and surrounding area.

Schedule a free inspection with one of our professional consultants, and get our recommendations for your situation.

Here is an example estimate from RWR, so you can get an idea of the detail and professionalism you can expect from our team of specialists.

This estimate is based on plans. The bid is for the installation of drilled cast-in-place reinforced concrete piers to underpin the existing foundation of the house as well as the installation of a new site retaining wall as per plans. Our price includes all labor and material to complete the job as per the itemized Scope of Work below.

Scope of Work
House Underpinning (Revised)
• Mobilize to site.
• Drill and install (5) 18” diameter x 12 ft. deep reinforced concrete piers along the rear side of house as per plans. Stockpile all generated spoils on site for re-compaction behind the new site wall. No off-haul is included.
• Excavate for and install (5) 1.5 ft. wide x 2.5 ft. long x 1.5 ft. deep reinforced concrete pier haunches under existing foundation that are connected to the piers via pier cap extension of new piers as shown on detail 1 of sheet SK-2.
• Includes the installation of the new 10” wide x 18” tall reinforced concrete grade beam attached to existing house foundation via epoxy dowels at 12” on center as per plans.
• Clean up site and remove silt fence and construction debris.

Pier Supported 4 Ft. Retaining Wall
• Includes grubbing and clearing of existing shrubs and ivy (as necessary for the installation of the new wall), demolition of existing failing wooden wall and removal of debris from site.
• Excavate for the installation of the new concrete wall and piers as per plans. Stockpile native soil for re-compaction operations as needed. Stockpile spoils on site.
• Drill and install (9) 18” diameter x 12 ft. deep reinforced concrete piers for the new retaining wall. Stockpile all generated spoils on site for re-compaction behind the new site wall. No off-haul is included.
• Install a new 56 ft. long reinforced concrete grade beam & 4.5 ft. high retaining wall as per detail 1.
• Our estimate includes the installation of Miradrain 6000 drainage membranes behind the new wall terminating into a new 12” x 12” sub-drainage rock pocket along the bottom of the wall. Outlet via buried 4” diameter SDR-35 tite line at the turn-around corner of the new wall. Final outlet by others.
• Backfill all stockpiled and generated spoils behind the new retaining wall in compacted lifts.
• Clean-up site and construction debris from site.

Qualifications and Clarifications
• Includes one mobilization only.
• Proposal is based on working std 40 hours per week, 5 work days and mutually agreeable schedules.
• Full payment upon job completion.
Unit Prices/Alternates
• Additional footage for drilled and installed pier depths

Exclusions
• Cost of plans, permits, bonds, testing and inspections.
• Increased costs of excavation or drilling due to hard rock, tree roots, caving conditions, underground water. (Hard rock excavation is defined as material that requires the use of pneumatically, hydraulically or 35 pound and over electrically operated hammers or rams to excavate.) (Hard rock drilling is defined as a penetration rate slower than 1 ft. in 5 minutes.)
• Demolition (hard or soft) except for the removal of the existing wooden wall.
• Excavation of haunches for foundations buried over 12” deep from existing grades.
• House re-leveling or lifting.
• Any work on utilities including buried pipes.
• Structural/earth shoring.
• Repair to landscaping or irrigation.
• Excavation of hazardous materials, underground tanks, or materials unacceptable at dumps.

Need underpinning to permanently stabilize home or level floors in Berkeley? Call 415-457-5658 for a prompt, reliable estimate from our experienced estimator. RWR has been installing underpinning in Berkeley for over 24 years. You will see our trucks and equipment working in Berkeley, Berkeley Hills, and Kensington.

Here’s the kind of detailed estimate you can rely on, to correct foundation problems and perform structural work, including even zero lot line jobs that require our expertise:

This estimate is based on architectural drawings and structural drawings. The estimate is for the installation of new concrete foundation work and piers as shown on structural drawings. 

The price includes all labor and material to complete the work as per the itemized Scope of Work below.

Scope of Work
Basement/Foundation Plan
• Mobilize to jobsite & supervision.
• Demolish the existing concrete foundation as shown on drawings. Remove demolished foundation debris from site.
• Excavate for the installation of the new basement level footings, walls and tie beams as shown on plans. Includes the excavation of (5) pier haunches per detail 14/S2.1. Off-haul excavated spoils from site.
• Drill and install a total (11) 16” diameter x 8 ft. deep plus (20) 16” diameter x 6 ft. deep reinforced concrete piers with rebar cage configuration shown on structural detail 14/S2.1.
• Install new reinforced concrete foundation per layout and structural details shown on foundation sheet S2.1.
• Clean-up and remove construction debris from site.

Breakdown Pricing (not self-supporting)
• Mobilization & Supervision
• Hard demolition
• Mass & foundation excavation & Off-haul
• Drill and install concrete piers.
• Install basement concrete foundation
Alternate #1 – Drainage and Waterproofing
• Install Paraseal waterproofing membranes over Miradrain 6000 drainage panels against the earth cuts at the new perimeter basement retaining walls (grid lines A, E, C, D & 4.5). Terminate both membranes at the bottom of footing level into a new AquaDrain 15X/Edge drain. connect edge drain @ three locations into a continuous buried 4” dia. SDR-35 tite line. Outlet tite line into a small 2 ft. x 2 ft. x 2 ft. drainage/dissipater approx. 20 ft. downhill from the back of house. Final outlet location TBD.
Alternate #2 – Xypex additive
• Add Xypex waterproofing additive to the new structural retaining walls and structural slab concrete mix at the batch plant by concrete supplier.
Qualifications and Clarifications
• Job is bid as package.
• Includes one mobilization only.
• Elevations and layout to be provided by general contractor performing the reminder of the project. Contractor will assist general contractors with layout and elevations.
• Proposal is based on working std 40 hours per week, 5 work days and mutually agreeable schedules.
• Progress payments every two weeks. No retention.

Note: This bid assumes contractor will be performing services as a Sub-contractor to a General Contractor. Bid assumes contract will utilize standard contractual provisions. It reserves the right to accept or reject General Contractor’s contractual provisions.

Exclusions
• Cost of plans, permits, bonds, testing and inspections.
• Increased costs of excavation or drilling due to hard rock, tree roots, caving conditions, underground water. (Hard rock excavation is defined as material that requires the use of pneumatically, hydraulically or 35 pound and over electrically operated hammers or rams to excavate.) (Hard rock drilling is defined as a penetration rate slower than 1 ft. in 5 minutes.)
• Earth shoring/structural shoring operations.
• Erosion control or site winterization.
• Excavation of hazardous materials, underground tanks, or materials unacceptable at dumps.
• Architectural concrete or type of special concrete finish product (e.g. board form, color concrete, sealers, etching, etc.).
• Any work on utilities including buried pipes.
• Soil grouting, injection or permeation.
• Concrete work other than basement foundation work shown on S2.1.
• Foundation embedments other than foundation “J” bolts.