Water under the floor

Water under your hardwood, tile, or carpet does not stay where you see it. In Treasure Valley, a busted supply line, a slab leak, or winter storm water wicking up through a foundation gap can put gallons into the subfloor before anything shows on top. The wet patch you see understates the real spread: a water damaged subfloor under plywood or OSB is what keeps the floor structurally sound, and it is what decides the fix.

What happens under the flooring and how long the fix takes

Water travels laterally under the subfloor, so the damage ring is wider than the drip spot. Crews map the true extent with moisture meters and thermal imaging, then begin structural drying. Dense materials like hardwood and concrete fall into the IICRC Class 4 category and run seven to fourteen days. Hardwood needs low, steady heat because high heat will warp it. Carpet and pad get pulled out and dried separately; the pad is almost always replaced because it holds water. Anything that cannot dry to a verified reading gets removed to stop mold building underneath. The decision on the subfloor itself: clean water caught early means OSB can dry back flat. Swelled edges or delaminating layers mean it will telegraph bumps through your new flooring, and the fix is to cut that section out and replace it.

What to check and ask for before you sign off

Ask for the moisture mapping report showing the full extent of the wet area, including lateral spread beyond the original drip point. They should verify dryness with a meter reading taken against an unaffected reference point in the same room. If your subfloor is OSB and the edges have swelled, ask directly whether it will dry flat or whether a section needs cutting. That answer separates a drying job from a replacement job and changes both the timeline and the cost by a wide margin.

Water damage?

Fill out the request and one local water damage restoration company covering your town calls or texts back.