When commercial flooring starts to fail, the first question is always the same: can it be repaired, or does it need to be replaced? The honest answer is that you can't know until you know why it failed. Replacing a floor without finding the cause usually means replacing it again.

Some systems — polished concrete, terrazzo, properly installed ceramic and porcelain — last decades. Others, including carpet tile, LVT, LVP, VCT, sheet vinyl and rubber, can often be repaired or selectively replaced. Which path makes sense depends entirely on the diagnosis.

The floor is only as good as what it's bonded to

Commercial flooring products are not structural. They perform exactly as well as the substrate under them.

When we evaluate a failing floor, the substrate is the first thing we look at. Substrate problems produce cracking, curling, loose flooring, telegraphing, broken joints, debonding and repeated failures in the same area.

If the substrate is failing, swapping out finished flooring hides the problem temporarily. The correct fix is to remove the affected material, repair the substrate, and reinstall.

Flatness tolerances

Resilient products — LVT, LVP, sheet vinyl, rubber — generally require the substrate to be flat within 3/16 inch over 10 feet, or 1/8 inch over 6 feet, though the specification varies by manufacturer.

Note that this is flatness, not level. A floor can slope across a room and perform fine. What resilient flooring cannot tolerate is local waviness, because that's what leaves the material unsupported and flexing.

Outside tolerance, the product carries stress it wasn't designed for, and it eventually fails. We evaluate substrates against the requirement of the specific flooring system rather than assuming one number covers everything.

Moisture

Moisture in or beneath a slab is the other major cause of failure, and it's the one most often missed.

Excess moisture attacks adhesives and finished flooring, producing adhesive breakdown, debonding, curling, discoloration and loose flooring. Testing for it before repairing matters — otherwise the identical failure returns after the new floor is installed.

Adhesive failures

If the substrate checks out, we look at the adhesive and original installation. Adhesive failures trace back to:

Incorrect adhesive selection
Improper trowel-notch size
Too much or too little adhesive
Improper application
Incorrect working or open time
Moisture conditions
Contaminated substrate

The product, adhesive, substrate and installation method function as one system. When all four are performing as intended, a localized repair is usually the most economical answer. When one isn't, a larger correction is required.

When a localized repair isn't enough

Sometimes a failure looks isolated while the underlying defect runs through the whole installation.

A few LVT planks lift in one corner. The rest of the floor looks fine. But if the original adhesive was applied incorrectly throughout, replacing the visible damage fixes nothing — the next section is already on its way to failing.

Trade Mark Floors will not knowingly perform a localized repair that leaves a known installation defect in place. We'll explain what we found and recommend a strategy that addresses the cause rather than the symptom. That occasionally costs us the small job. It also means we're not called back in eight months to redo work we just did.

Repair experience in Louisville

Assumption High School — ongoing annual VCT replacement as sections require repair, worked around the school calendar.

Planet Fitness — commercial rubber flooring repairs performed while the facilities remained open. Dropped weights damage more than the rubber; they fracture the concrete underneath. We removed the affected rubber, demolished the damaged concrete, repaired the substrate and reinstalled over the corrected surface.

Sometimes the flooring isn't the actual problem.

Choosing a contractor for a failing floor

Before repairing or replacing, your contractor should be able to tell you why the floor failed. Experience, manufacturer training and familiarity with industry standards are what make that diagnosis possible.

Trade Mark Floors holds certifications and training with Schluter tile systems, Armstrong Flooring systems and UZIN floor leveling and preparation, and is a member of the Tile Council of North America.

We evaluate the finished flooring, adhesive, substrate, moisture conditions and original installation before recommending anything.

Sometimes the flooring isn't the problem.