Who would I get to check for moisture in slab?
We pulled up the carpet in the bedroom yesterday and there are some hairline cracks in the slab, one is pencil line. There were some hairline cracks in the kitchen and we put down Redguard before tile, after advice here and on the John Bridge forum. We thought we'd do the same in the bedroom before putting down wood.
But I read the installation instructions for the engineered hardwood I picked out and this is what it said: Subfloors must be clean and free of dirt, curing compounds, sealers, drywall mud, paint, wax, grease, urethane, or other materials that may affect the integrity of the flooring material or adhesives used to install the flooring.
Ã¯Â¿Â½ All subfloors and subfloor systems must be structurally sound and must be installed following their manufacturer's recommendations. Local building codes may only establish minimum requirements of the flooring system and may not provide adequate rigidity and support for proper installation and performance of a hardwood floor. Whenever possible install the planks perpendicular to the floor joists for maximum stability. Our warranties DO NOT cover any problems caused by inadequate substructures or improper installation of said substructures.
Ã¯Â¿Â½ Test wood sub floors and wood flooring for moisture content using a pin-type moisture meter. Take readings of the subfloor Ã¯Â¿Â½ minimum of 20 readings per 1000 sq. ft. and average the results. In most regions, a "dry" subfloor that is ready to work on has a moisture content of 12% or less and the wood should be within 4% of the subfloor moisture content.
There is also enamel paint overspray all around the perimeter of the room from when the house was built, and it looks like they spilled some and spread it out with rollers in a large area completely covering the concrete.
When we put wood in the living room, the installer didn't test the slab until he was here to lay the flooring, and he didn't acclimate the flooring. They also didn't remove the enamel overspray next to the walls and we didn't seem to have a problem there. We did have problems with that flooring because it wasn't acclimated. I know when flooring people come, they have a job to do and want to get it done without delay.
I'd like to avoid problems this time, and want to get any problems addressed before we even order the wood.