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Question DetailsAsked on 9/19/2017

What is labor cost per sq ft to remove and replace subfoor plywood

The house is built on stilts 8' off the ground, the entire first floor flooded with 2" of water. The joist are 2x8 and have 8" of blown foam insulation in between them that all has to be removed, along with the finished flooring, all cabinets, 24" of sheetrock, and blown foam insulation in walls. Then subfloor replaced. Of course everything else will also all have to be replaced, although I am just trying to get a rough estimate per sq ft to remove and replace subfloor, along with all of these other variables. PLEASE HELP!

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Oh - SOOO sorry - 8' stilts were SOOO close to adequate for you - what a disappointment, I am sure.

Depends of course on the local cost structure (generally lower end if in Texas or FLorida, BUT because of hurricanes that might go up significantly), a bit on thype of materials to be used (about $1-1.50/SF difference between 1/2" OSB or particle board on the cheap end, to 3/4" CDX treated plywood on the high end) - but JUST to tear up the subflooring and replace it (assuming all cabinets and such are gone at that time) normally can run about $3-5/SF and occasionally even a touch less with one-man handyman type outfits, a bit more if glued-down sheathing - on up to about $10/SF in difficult conditions. If the plywood has gone fungusy/rotted so has to be removed from under the walls too (which is a slow piece-by-piece job) can run in the $10-20/SF range for a single room - lower for larger areas.

That should give you a ballpark for the subfloor part - though of course unless you are doing all the rest yourself, you need to get overall bids from a remodeling general contractor for the entire job - you can't reasonably add pieces together to get a total - should be significantly less than the sum of the parts.

Cabinets - if only 2" of water on the floor, IF the cabinets were built with separate or tee-down side bases sometimes it is easy to cut them off just below the top of base level and build a new base underneath, IF the water did not wick up above the 4-6" high base and affect the finished surfaces.

For cabinet replacements, drywall repairs, insulation, and so forth you can find previous questions (though they will not take into account regional flooding price bumpups) in the Home > categories under Browse Projects, at lower left.

Oh - and don't forget - the floor joists and wall framing and outer sheathing/siding and such should be disinfected while they are exposed, because the flood waters would have had both natural organics and organic silt as well as sewage, which can really stink on humid days if not disinfected during the reconstruction.

And don't forget replacing any wiring which went under water - some people will leave runs that were below water (like between joists) IF the actual boxes (free ends) stayed dry, other will (or local code may require) replacing ANY wire which went under water.

If water lines went under water AND lost water pressure they also should be internally disinfected by a plumber in case flood waters got into it.

Answered 3 years ago by LCD

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