Foundation Repair

We’ve compiled several articles about foundation repair and similar services.

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San Rafael’s diverse terrain, ranging from waterfront flats to rolling hills, creates a variety of foundation challenges for homeowners. In the flatlands, homes built on soft bay fill or expansive soils are prone to settling and soil movement, leading to foundation cracks and structural instability. In hillside areas, soil erosion and slope movement can further impact foundation health, necessitating professional repairs and leveling.

Seismic risks are also a concern in San Rafael due to its proximity to the San Andreas Fault. Earthquakes in the area can cause significant ground shaking and soil liquefaction, particularly in neighborhoods with soft soils. Older homes that lack modern seismic reinforcements are especially vulnerable. Seismic retrofitting—such as foundation bolting, cripple wall bracing, and shear wall installation—is essential to safeguard these homes during seismic events.

Drainage issues are common in San Rafael, particularly during heavy rains when water runoff can lead to soil erosion and hydrostatic pressure against foundation walls. Without proper drainage systems, homes are at risk of leaks, cracks, and long-term moisture damage. Installing solutions like French drains, sump pumps, and retaining walls helps manage water flow and protects San Rafael homes from foundation problems caused by water intrusion.

Drainage Project Example

concrete repair, drainage, retaining wall, retaining walls

Drainage Project from our files: To correct drainage problem, we will dowel into the existing retaining wall located adjacent to the right rear corner of the building and form and pour a new 18 feet long concrete footing (which will also serve to support the existing...

Drainage System Installation Example

drainage, estimates, Foundation Repair, french drain, garage foundation, grading, retaining wall

Scope of Work We will construct a drainage system along the right, rear, and left sides of your home. The system will start on the right side adjacent the rear of the garage with a trench 2 feet deep. From here it will extend along the right side to the rear corner,...

Drainage Near Retaining Wall

drainage, estimates

Drainage Near Retaining Wall We will install approximately 120 lineal feet of surface drainage system around the pool in the areas marked by owner, and below the retaining wall. We will provide stub ups only, no drains or grates are included. We will expose...

Patio, Catch Basin, Drainage Example

catch basin, drainage, estimates, patio

We will remove and not replace a portion of the front flagstone patio, install a new 8 inch catch basin, and discharge the new drain through a 4 inch solid pipe across your front yard and through the existing pipe that penetrates the left side retaining wall. We will...

Foundation Replacement Example

driveway, estimates, Foundation Repair

1. Construct approximately 88 lineal feet of concrete foundation with 2x6 pressure treated sills and 5/8 inch anchor bolts, (Stab bolts for holdowns to be supplied and placed by others). Access door to be constructed and installed by others. 2. Construct seven 2 feet...

Basement drainage repair example

drainage, estimates

We will construct a drainage system around the lower basement area. The system will be constructed in 2 legs, starting on either side of the basement entry stairs, and discharging into a sump located on the right side of the house, (3 sides of this system will be...

Garage Foundation and Drainage Example

drainage, estimates, excavation, Foundation Repair, french drain, garage foundation

On the garage we will do the following work: 1. Slope trenches and lay 140 lineal feet of 4 inch perforated pipe in previously excavated areas surrounding new foundation walls. The pipe to tie into new discharge pipe installed by Alderson Construction. 2. ...

Spa installation example

Foundation Repair

On the new spa we will do the following work: 1. Tune and lay approximately 100 lineal feet of 4 inch perforated pipe in previously excavated areas surrounding new foundation/retaining walls. The pipe to connect to the existing 6 inch discharge pipe. The portion on...

Drainage, Underpinning Example

drainage, Foundation Repair, underpinning

We will construct a drainage system along the rear and right sides of your home. The system will start at the left rear corner with a trench 4 feet deep. From here it will extend along the rear to the right corner, then continue along the right side to the front...

Home Drainage System

drainage, estimates, french drain, underpinning

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