Concrete floor installation in Sherwood OR - a slab sized for what it carries

A Portland cost guide puts a new concrete slab in Portland, Oregon at about $4 to $13 per square foot, not counting staining or stamping. That's what the market usually charges, not our price, and the same guide puts reinforced slabs above plain pads, so steel is a real line in the budget. Your own number comes from the written scope once I've seen the space.

A new slab should be walkable within 48 hours, but concrete takes a month to fully cure, which is the slow hardening that keeps going after it looks done. A cautious plan waits a week before heavier loads like parking, and temperature, humidity, wind, thickness and the mix all change how fast it gets there, so set your move-in or parking date with that in mind.

It depends on the slab, because Oregon exempts a private concrete slab from a building permit only when it's no more than 30 inches above the ground next to it and has no basement or story below it. Plumbing, electrical or mechanical work in the same job can still need its own permit, so check with the local building department that issues permits for your address, which you can find in Oregon's directory of local building departments. Whoever does the work pulls the permits, so we agree on that with you before we start and help with the paperwork when your project needs it.

Yes, the Oregon Construction Contractors Board says state law generally requires anyone paid for construction on real property to be licensed, and it lists concrete among its examples. We are, and I'm glad to talk it over at the estimate.

Water vapor coming up through the slab can do it, and a national white paper from one barrier maker says even small holes in the vapor retarder, the sheet under the slab that slows that vapor, can sharply raise how much gets through. That can lead to floor covering failures and delays, so during the work we watch over the barrier so foot traffic doesn't tear it before the pour.

It can be, since the Oregon Health Authority says NW Oregon, including the Willamette River Valley, tends to be the area of greatest known radon concern. The authority also says testing is the only way to know whether a home has elevated radon.