Settlement & Sinking

Settlement & Sinking

Sinking & Settling Foundation Repair in Greater Washington D.C.

We can solve structural problems caused by foundation settlement in Virginia, the District of Columbia, and Maryland

illustration of a settling, sinking foundation structure with a tilting chimney and cracked foundation

Foundation settlement and house movement can occur when a soil layer can't support the weight of the home.

Have you noticed cracks in your foundation walls, uneven floors, or sticking windows in your home? If these sound like problems you've experienced, you may have a sinking or settling foundation.

At NV Waterproofing & Foundation Repair, we fix foundation settlement issues by installing steel foundation piers. These piers will extend beneath the foundation, contacting strong supporting soils that will permanently stabilize your structure.

NV Waterproofing & Foundation Repair are your local experts for all types of foundation repair. Call us for a free foundation inspection and foundation settlement repair quote today! We serve Arlington, Alexandria, Washington D.C. and many nearby areas in Virginia, the District of Columbia, and Maryland.

Identifying foundation settlement issues

Signs of a settling foundation can be very subtle at first -- many homeowners can go months or even years before noticing a crack in their foundation. The long-term damage from foundation settlement, however, is ongoing and will lead to more severe foundation problems.

 

Stair-step cracks showing in a home foundation in Reston

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.

A chimney leaning away from the home on a Rockville foundation

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.

A window sill cracking and separating from the foundation wall in a Centreville home.

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.

a severely damaged cracked concrete slab floor in Gainsville

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 cracking due to foundation settlement in Sterling

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.

 

Repairing foundation settlement

At NV Waterproofing & Foundation Repair, we recommend installing foundation piers to stabilize, repair, and restore a foundation that's been damaged by issues related to foundation settlement and poor supporting soils.

There are several different types of foundation piers that are designed to address each kind of foundation problem. We install three different kinds of foundation piers: push piers, helical piers, and slab piers.

Foundation Push Piers

A graphic diagram of foundation piers installed along a foundation.

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

A graphic illustration of steel helical piers supporting a home foundation.

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

An illustration of slab piers supporting a concrete slab floor.

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.

We repair settling foundations in VA, D.C., and MD!

At NV Waterproofing & Foundation Repair, we can identify and repair any issue you may be having with settling, sinking foundations, and settlement house movement. We have a wide variety of solutions for foundation repair that have been tested and proven effective throughout the United States and Canada through the Supportworks network of foundation contractors.

Each of our solutions starts with a free, written foundation repair quote, and includes a personal consultation with a foundation expert, an in-person inspection, and a free copy of our 90-page foundation repair book. To schedule an appointment with one of our specialists, call or e-mail us today! We proudly serve Alexandria, Washington D.C., Arlington, Bethesda, Ashburn, Gaithersburg, Fairfax, Gainesville, Silver Spring, Sterling, and nearby.

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NV Waterproofing & Foundation Repair services Greater Washington D.C.

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NV Waterproofing & Foundation Repair
12200 Livingston Rd
Manassas, VA 20109
1-703-722-8580
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