Installing Subfloor to concrete Slab
I intend to use pressure treated sleepers fastened to the existing concrete floor and covering those with T&G plywood for a subfloor.
Do I need to first lay felt paper on concrete prior to installing sleepers?
What is the best methode for fastening the sleepers to the concrete? .22 cal "Hilti"? or ?
Thanks in advance for your help.
As far as I know, the felt paper would serve as a moisture barrier to prevent moisture from seeping up through the concrete and allowing your flooring to mildew from underneath. The moisture might be seeping even on an apparently dry concrete floor and just evaporating unnoticeably when it is not covered. Some experts advise testing your concrete for moisture by taping a 2 x 2 foot piece of plastic sheeting to the floor and letting it sit for three days. If water beads underneath it, you have moisture seeping up and need a moisture barrier.
My thoughts are: why bother testing? A moisture barrier of a 6 mil piece of sheeting costs less than $20, and it does no apparent harm, and will protect the flooring from future moisture problems that have not yet developed. The only issue is how you will secure the sleepers to the floor, which is resolved by placing glue compound both over and under the plastic where you would place the sleepers. The plastic gets sandwiched between two layers of glue, and the sleepers are secure.
Again, a moisture barrier is not necessary if you do not have moisture, although it will be a better job if you include it. Builders' felt is not as good a moisture barrier as plastic, but it is a commonly used material.
As for the best way to fix the sleepers to the floor, I have read that troweling down a glueing compound is sufficient. You can also use concrete nails/screws, but make sure they end up flush with the top of the sleepers.
[This message has been edited by Lawrence (edited December 12, 2000).]
- 15 Old House Features We Shouldn't Abandon
- 13 Lazy Cleaning Tricks for a Spotless Home
- Laundry Room Ideas to Knock Your Socks Off
- Insanely Easy 60-Minute Home Improvements
- 12 Sheds You Could Live (or Work) In
- Assembly Required: 15 DIY Kit Homes
- 7 House Sounds You Never Want to Ignore
- 10 Surprisingly Simple Woodworking Projects
- Worth It: 8 Renovations That Pay You Back
- Organize Your Life with 12 Dollar-Store Buys
- 9 Totally Amazing Mobile Home Makeovers
- Don't Make These 7 Mistakes in Small Spaces
- 20 Sneaky Storage Ideas
- 15 Totally Unexpected DIY Flooring Alternatives
- 7 Easy Budget-Friendly Backyard Makeovers
- 10 Closet Cures That Cost Less Than $100
- 11 Easy DIY Projects to Declutter Your Home
- 10 "Zero Dollar" Garden Hacks
- 10 Killproof Plants for a No-Effort Landscape
- 9 Insanely Easy 1-Hour Backyard Projects