Sinking & Settling Foundation Repair in Greater Pittsburgh

Stair-Step Cracking

Stair-step cracking is very common in brick and concrete block walls and is a sure sign of foundation settlement. As the settlement house movement continues, vertical cracks may widen or become uneven as wall sections tilt away from each other, indicating more severe displacement.

Keep an eye out for cracks that are wider at the top than at the bottom, as this is a sign of advancing settlement.

Tilting Chimneys

Tilting chimneys that are separating from the home are one of the most intimidating and dramatic signs of a settling foundation.

Sometimes a chimney is built on a footing that is not connected to the house foundation. In this situation, the enormous weight of a chimney can make it even more at risk of settlement.

Damaged Doors & Windows

An opening cut in any wall is a weak point, so signs of foundation settlement and house movement often show up around door and window openings.

Doors and windows frames may be racked out of square, cracks may extend from the corners above doors and windows, and doors may separate from the framing or exterior finish. Other signs of foundation settlement include sticking or jamming doors and windows, and locks that stop working.

Slab Floor Cracking

Cracks in your concrete floor slab can be a sign of foundation settlement, but they may also be a sign that the slab floor alone has settled.

There are times when your slab floor may sink or lift independently of the foundation walls, damaging the floors but not necessarily the foundation walls themselves.

Drywall Cracks

Cracks in drywall throughout the house are reliable indicators of foundation settlement. Cracks will often be larger and more obvious in the home's upper levels.

Typical drywall cracks during foundation settlement are commonly located at the corners of doors and windows and along drywall seams. Drywall tape can also be a good indicator, especially if it's ripping or coming loose. Drywall cracks can also be a sign of sinking crawl space supports, sinking floors, and heaving floors.

Foundation Push Piers

Push piers connect the foundation to strong, stable soil or bedrock. Foundation piers attach to the base of the foundation with special brackets and extend through settling and unstable soil layers, transferring the weight of your home to competent soils.

Foundation push piers are straight, steel piers that attach to your foundation and extend far below the structure to strong supporting soils. During the installation, a section of the foundation footing is exposed and cut to attach to each pier's bracket. This is possible year-round from either inside or outside of your foundation or structure.

Foundation brackets are secured to the footing, and tubular pier sections are hydraulically driven through each bracket. Pier sections continue to be driven downwards until the piers meet competent strata that can bear the weight of your home without compression.

When all push piers have been installed, they will work in unison to transfer the weight of the structure to the strong soils or bedrock below. If possible, the home is also lifted back to its original, level position.

More about installing foundation push piers.

Foundation Helical Piers

Like push piers, helical piers are attached to the foundation by mounting a bracket. Helical piers include rotating blades that are advanced (or "screwed") into the soil.

Foundation helical piers are straight, steel piers that have helical blades welded to each shaft. This installation is possible from either inside or outside of your foundation. These piers are driven into the soils underneath your foundation, then each pier is connected to the structure's foundation via a steel bracket.

During the installation, a section of the footing is exposed and cut for each bracket. Next, round-shaft helical piers are mechanically advanced into the soil. Once the helical pier has been advanced into the soil, a foundation bracket is secured to the footing.

When all helical piers have been installed, they will work in unison to transfer the weight of the structure to competent soil. If possible, the structure is also lifted back to a level position.

More about installing foundation helical piers.

Slab Pier Systems

When the soil beneath a concrete slab shrinks or settles, the slab itself is also likely to settle, often cracking in the process. Slab piers restore stability by connecting the slab to competent soil at greater depth.

Foundation slab piers are straight steel piers that extend from stable soils deep below the structure to support brackets directly in contact with the underside of the slab. These piers are meant to support a settling concrete floor, and are not appropriate for foundation wall stabilization.

Slab piers are also inappropriate for repairing heaving foundations, where the floor is being lifted by expansive soils or frost heave.

During installation, a small hole is cored through the concrete floor. A slab bracket is assembled beneath the concrete slab, and steel tubes are hydraulically driven down through this bracket assembly.

When the slab piers have reached competent soils, the weight of the slab is transferred through the piers to load-bearing soils below. If possible, the slab is lifted back to level position.

At the end of the installation, grout is pumped under the slab to fill any voids, and all cored holes in the slab are restored with new concrete for a clean, professional look.