Homeowners read these before they call me, and I think that's healthy — you should hear from people with no stake in your job before you spend five figures. Here's where I'd actually send you, and where I wouldn't.
r/Flooring — the best of them by a distance. Working installers answer, and they'll tell you when the job you're describing is a bad idea. If you post a photo of a subfloor, this is where you get a real read on it.
r/Tile — narrower and better than its size suggests. The waterproofing and substrate-flatness discussions here are more rigorous than anywhere else I've found, including trade publications. If you're doing a shower, read this one.
r/HomeImprovement — enormous, so the answers regress toward general handiness. Good for a sanity check on whether a quote is roughly sane. Weaker once the question gets specific about substrate or adhesive.
r/Construction — blunt and worth it. Not a flooring sub, but if your real question is structural — a bouncy floor, a questionable addition, joists you're unsure about — you'll get a straighter answer here than from a flooring forum.
r/Carpentry — for anything under the floor. Deflection, joist spans, subfloor repair. The people answering build the thing your floor sits on.
The limitation worth knowing: almost none of these communities are answering from a Gulf Coast slab. Advice that's completely sound in Ohio — about acclimation times, about whether you really need a moisture test, about solid wood over concrete — quietly stops being true at 80% relative humidity on a slab poured without a vapor barrier. It isn't bad advice. It's advice from a different climate, and the failures it causes here take two years to show up.
That's the gap I try to write into, most directly in what actually works on a Houston slab.
