On Oct 11, 4:43 pm, (Malcolm Hoar) wrote:
In article . com, wrote:
Okay, I know this is probably a stupid question with an obvious
answer, but...How do I tell if my concrete basement floor is level or
not? It's not so bad that it's obviously wavy, but I don't want to
plan on finishing the basement with an engineered wood floor only to
find out that it's slightly out of level. I've heard as little as 10
mm over a 3m length will cause problems, but I am not sure how to
detect this amount of dip or rise. Thanks for any help!

The flooring won't care if it's level or not, within reason. It
does need to be sound, dry, and flat. If you can't see a
significant problem with a 8-10ft straight edge, or a ball,
or water, you're unlikely to have any issues.

Since this is a basement, you need to pay attention to the
moisture issues. Is it dry now? If not, correct that problem
before installing a floor. Include a moisture barrier and
follow ALL of the manufacturer's recommendations during the
actual installation of the floor.

Oh, and I assume this concrete floor is "mature" and fully
cured. If this is newly poured concrete there are quite a
few additional issues to consider.

--
|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~|
| Malcolm Hoar "The more I practice, the luckier I get". |
| Gary Player. |
|http://www.malch.com/ Shpx gur PQN. |
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spray some water to see where it puddles and drains