02-06-2013 01:50 PM
Hi I purchased some laminate floring to install in my living room which has a concrete slab. My biggest concern when i'm doing this installation is that the concrete slab is level and flat as can be. I've read that i can check the flatness by using a level or a screed.
My question is when i'm checking for flatness on this concrete am i just scraping the screed or level accross it and checking where it dips or bulges or what is the method when doing this because at first I assumed that I'd put my level every few inches going top to bottom or so i'd put my level on the floor and check and this seems like it would take forever more like a day or longer if i'm doing this every few inches for the floor or is there another method that is as fast that i can do to verify where the dips are and where the humps are.
The other question within this question is how do i determine if its a hump becuase to me if there is a gap in the middle it automatically in my brain is going to be a dip which i would fill in with a skim coat.
One last question. Can i use henry universal patch & skim coat for the dips instead of using that self leveling concrete which doesnt look all that fun to work with.
02-07-2013 04:03 PM
Hey there wilnicm,
Thanks for joining the community!~
A level, screed or any straightedge tool is exactly what you'll be looking for. A decent 6' level will make easy work of checking your subfloor for any dips or humps. You can also use a piece of string that runs from one edge of the room to another, which will help point any problem areas out. For suitable installations, you need to fit within a tolerance of 1/8" deflection within a 6' span. Anything that exceeds that will be cause for repairing your floor and flattening it out. You can also use a small marble to see if it rolls down any ridges in the floor that you may be concerned about. If it stops suddenly in one particular area or curves unnaturally, then you'll know where your issue is.
As for the product to use, the Henry's Unipro works great for this job. The only major difference is that the Self-leveler product does just that, seek it's own level. The Henry product will still fill up to an 1" difference with two coatings of 1/2" each however.
I’m a Home Depot Store Associate, trained and authorized to help people on the Internet.