Yes, polyurethane foam can lift some sinking concrete floors inside a home. But a low floor above a crawl space may need a different repair. The answer depends on what holds up the floor and why it sank. A slab that rests on soil is not the same as a wood floor built over an open space. Before booking concrete lifting in New Orleans, find out which type you have. That first check helps you avoid paying for work that will not solve the problem.
How Foam Lifts an Interior Concrete Slab
An interior floor slab may sink when the soil below it settles or washes away. Gaps can form, leaving parts of the concrete without firm support. A crew drills small holes through the slab and pumps special foam beneath it. As the foam grows, it fills gaps and can raise the low area. The crew checks the height as the work moves along. Once the lift is done, the holes are patched. This foam injection process can save a usable slab without tearing out the whole floor. Source: HMI
Why Crawl Space Floors Need a Different Check
Most floors above a crawl space rest on wood beams and joists. Joists are the long pieces of wood that help hold up your floor. If they rot, bend, or lose support, the floor can sag. Foam beneath the dirt will not fix broken wood or replace missing posts. These homes may need new wood, added supports, or repairs to the bases under the posts. A sagging floor should be checked from below so the repair targets the weak part. Filling the open crawl space with foam is not a standard floor repair. Source: Epp Foundation Repair
When Foam May Be the Right Choice
Foam may suit a sunken slab that sits on the ground and still has enough strength to be lifted. Interior concrete floors and garage slabs can be candidates. Some crawl spaces also have a concrete floor over the soil. That floor needs its own check; lifting it does not mean the house above it will rise. A badly broken slab or a problem deep in the soil may call for other work. The crew must check the slab, its load, and its base before choosing slab leveling. Sources: HMI residential applications and soil stabilization guidance
Find Out Why the Floor Sank
A good repair plan starts with the cause of soil settlement. Loose fill can pack down over time. Water from a broken pipe or poor drainage can also weaken the ground beneath concrete. Raising the floor without dealing with an active leak leaves part of the problem in place. Tell the crew about wet spots, recent plumbing work, or cracks that keep growing. Drainage problems may need separate repairs before or alongside the lift. Foam can support concrete, but it does not repair a leaking pipe. Source: HMI
What About Tile, Carpet, and Hidden Pipes?
An indoor repair needs a plan for the floor covering as well as the concrete. Ask how the crew will reach the slab through tile, carpet, or wood. Some flooring may need to be moved or replaced at drill points. The crew also needs to check for pipes and other hidden lines before drilling. Existing cracks may still show after the lift, and damaged tile may need its own repair. Discuss these limits during the floor inspection so you understand what the quote covers and what work may remain.
Ask Polyco Spray Foam About Your Sinking Floor
Concrete lifting uses foam made for that job. Ordinary spray foam insulation and small cans of gap filler are not substitutes. Trying to raise a floor yourself can damage the slab or nearby parts of the home. Polyco Spray Foam offers concrete lifting in New Orleans using polyurethane foam. If your floor has a dip or slope, contact Polyco at 225-577-6163 to request a free estimate. Ask whether your interior slab is a good fit for lifting and what checks are needed before work starts. Sources: HMI foam guidance and Polyco Spray Foam