Floor flatness

[Floorist]

Part III ? Subfloor Flatness and Integrity

A. Wood subfloors must be flat, clean, dry, structurally sound, free of squeaks and free of protruding fasteners.
1. For installations using mechanical fasteners of 11/2? and longer, the subfloor should be flat to within 1⁄4? in 10 feet or 3/16? in 6 feet.
2. For glue-down installations and installations using mechanical fasteners of less than 11/2?, the subfloor should be flat to within 3/16? in 10 feet or 1/8? in 6 feet.
B. If peaks or valleys in the subfloor exceed the tolerances specified above, sand down the high spots and fill the low spots with a leveling compound or other material approved for use under wood flooring. However, it is the builder?s or general contractor?s responsibility to provide the wood-flooring contractor with a subfloor that is within the tolerances listed above.
C. Inspect the subfloor carefully. If there is movement or squeaks in the subfloor, refasten the subfloor to the joists in problem areas.
D. Protruding fasteners are easily remedied by driving those fasteners deeper into the subfloor.
__________________

 

[Floorist]

If only...

"However, it is the builder?s or general contractor?s responsibility to provide the wood-flooring contractor with a subfloor that is within the tolerances listed above."

 

[highup]

If only...

"However, it is the builder?s or general contractor?s responsibility to provide the wood-flooring contractor with a subfloor that is within the tolerances listed above."

Wake up, you were just having a bad dream.

 

[Ernesto]

The builder has long gone on the residential and commercial floors so it's the end users responsibility. Typically covered by carpets that hide a multitude of sins.