Leak from the refrigerator water line
A weeping ice-maker connection behind the fridge can soak the floor for months. We replace the line or valve and the damaged subfloor under it.
Serving Mount Prospect & nearby Des Plaines, Arlington Heights
Kitchen Subfloor Repair in Mount Prospect, IL
Soft, rotted or squeaky kitchen subfloors opened up, rebuilt and made solid in Mount Prospect homes.
- Technicians covering Mount Prospect ZIP 60056, 60005
- Diagnosis first, then a written price for the repair
- Honest advice when replacing makes more sense
Subfloor problems we fix in Mount Prospect kitchens
A soft spot in front of the dishwasher or sink usually means water has been reaching the wood under the floor for a while. In Mount Prospect we find and stop the leak, cut out the damaged subfloor, check the joists and install new panels that are glued and screwed down.
Floor too thin for tile
Thin or single-layer subfloors can crack tile and grout. An added layer and solid fastening make the floor tile-ready.
Uneven or out-of-level floor
A floor that rolls under a straightedge needs flattening before new flooring. We choose between leveling the framing and leveling the surface.
Spongy floor at the sink base
If the floor dips in front of the sink, the damage often reaches under the cabinet. We open the area carefully and rebuild it.
Soft spot in front of the dishwasher
That spongy patch near the dishwasher is one of the most common subfloor repairs we do. The leak gets fixed first, then the damaged panel comes out.
Swollen, mushroomed panel edges
Ridges along panel joints often mean wet OSB. Sanding doesn't fix it; the swollen sections are cut out.
Rot found during a remodel
Pulling up old vinyl often uncovers dark, crumbling plywood. We cut it out to sound wood, treat the cause and install new panels before the new floor goes down.
Cracked tile or separating plank floor
Tile that cracks and click-lock floors that gap at the seams are often reacting to a subfloor that flexes or isn't flat. We fix the base so the finish floor stops failing.
What we check and fix
- Moving appliances and cabinetsWe clear access to the damaged area, including under cabinets when needed.
- Moisture testingA moisture meter shows how far the wet wood extends and whether the framing is dry enough to close.
- Cutting out damaged subfloorSoft and rotted sections are cut back to sound wood, ending on joist centers or new blocking.
- Joist inspection and reinforcementWet, cracked or undersized joists are sistered or blocked; structural work goes through a permit where required.
- New subfloor panelsTongue-and-groove plywood or OSB of matching thickness, glued to the joists and screwed down.
- Leveling and flatteningSeams are sanded flush and low spots filled so the finish floor has a flat base.
- Ready for flooringWhen we leave, the base is flat, dry and fastened, whoever installs the flooring on top.
Common fixes and parts
OSB panelsCommon in newer construction and fine when kept dry, but its edges swell if it gets wet.
Underlayment layerAn extra plywood or backer layer that stiffens the floor for tile or smooths it for vinyl.
Leveling compound and patchFlattening products for small dips and seams.
Construction adhesive and subfloor screwsGlue and screws together keep the subfloor from moving and squeaking.
Tongue-and-groove plywoodPlywood panels with interlocking edges that keep seams from moving.
Kitchen Subfloor Repair before and after — Mount Prospect homes
Problem
Fixed
DetailMount Prospect kitchen, 1980s two-story: kitchen subfloor repair
This one is a 1980s two-story in Mount Prospect. Before: oak parquet and white appliances. The reason for the call: cupped boards over a wet subfloor. After: new plywood subfloor glued and screwed down in front of the dishwasher, ready for flooring. The job covered moving appliances and cabinets, joist inspection and reinforcement, plus leveling and flattening.
Before
AfterKitchen Subfloor Repair in a 1980s two-story, Des Plaines
The site: a 1980s two-story in Des Plaines. Before: 12-inch beige ceramic tile and black appliances. The main complaint was a floor that gave underfoot by the sink. Finished kitchen: new plywood subfloor glued and screwed down in front of the dishwasher, ready for flooring. The job covered moving appliances and cabinets, cutting out damaged subfloor, plus joist inspection and reinforcement.
Kitchen Subfloor Repair in Des Plaines →
Before
AfterA Mount Prospect postwar bi-level: before and after
What changed: the oak floor sanded and refinished with a satin clear finish, grain visible and the water marks gone.
Hardwood Floor Repair & Refinishing in Mount Prospect →
Before
AfterBefore and after: a 1960s ranch in Mount Prospect
Finished: cabinets in white uppers and dusty blue lowers with matte black pulls, bright white quartz counters, a terracotta-look square tile backsplash, black-and-white checkerboard tile flooring and recessed lights and under-cabinet LED strips.
Kitchen Remodeling in Mount Prospect →
Before
AfterKitchen Cabinet Painting in a postwar bi-level, Mount Prospect
The same doors sprayed in pale sage, new polished nickel pulls; counters and floor stayed as they were.
Kitchen Cabinet Painting in Mount Prospect →How the repair goes
- Inspect the floorA visit to find the soft area, its cause and how far the damage goes.
- Stop the waterWe repair the source of moisture first.
- Rebuild the subfloorCut out, reinforce, replace and level the subfloor.
- Finish the floorNew flooring goes down over the repair, or we leave it ready for your installer.
Kitchen Subfloor Repair questions from Mount Prospect homeowners
Do I need a permit for subfloor repair?
Replacing subfloor panels usually doesn't. Structural work such as sistering or replacing joists often does, and we pull the permit when it's required.
Can a subfloor be repaired or does it need replacing?
Loose, squeaky subfloor can be refastened. Rotted, delaminated or swollen panels need to be replaced in the affected area.
Who should I call for subfloor repair?
You need someone who handles both the structure and the finish floor. We do both.
Do cabinets have to come out?
Only if the damage runs under them. We often remove a toe kick or sink base floor instead of the whole cabinet.
How do you find where the leak is coming from?
The wettest wood usually points to the source. We test connections and confirm it before closing the floor.
Do Mount Prospect condo associations need to approve kitchen subfloor repair?
Associations usually set rules for work hours, elevators, deliveries and insurance, and many require approval for plumbing, electrical or structural changes. We provide the certificate of insurance and follow the building's rules.
Does kitchen subfloor repair need a Mount Prospect building permit, and who files it?
Permits go through Community Development Department - Building & Inspection Services, phone (847) 870-5675. When your scope needs one, we prepare the application and schedule the inspections.
Do I need a permit for kitchen subfloor repair in Mount Prospect?
It depends on the scope. Mount Prospect's rule in short: Kitchen remodels need a permit and a code review (about 10 business days). We handle the permit when one is needed with Community Development Department - Building & Inspection Services.
Do you work in my part of Mount Prospect?
Yes. Our crews work across Mount Prospect — ZIP 60056, 60005 — and nearby Des Plaines, Arlington Heights, Elk Grove Village.
Working in Mount Prospect
- A lot of Mount Prospect kitchens date from the 1960s. We know these layouts well and what is worth keeping.
- Condo or townhome? We follow association rules on work hours and elevators and bring the insurance certificate your board asks for.
- We know how Community Development Department - Building & Inspection Services handles kitchen permits and pull them for you.
ZIP 60056ZIP 60005
Kitchen Subfloor Repair nearby
Other kitchen services in Mount Prospect
Hardwood Floor Repair & RefinishingSanding, refinishing and board repairs for kitchen hardwood floors.
Kitchen RemodelingFull kitchen remodels, from layout to last cabinet pull.
Kitchen Cabinet PaintingFactory-smooth painted cabinets without replacing them.
Cabinet RefacingNew doors and fronts on your existing cabinet boxes.
Countertop Fabrication & InstallationQuartz, granite and butcher block, templated and installed.