I have a project in Florida, a 30year old house of wood construction on a crawlspace. The sub floor is 1/2″ ply(not t&g) and some of the sheets are lain with the the joist, very spongy. Should I glue and screw 3/4″ t&g right on top of the 1/2″, rip up the 1/2″ and glue and screw the 3/4″ to the joist or lay felt on the 1/2″ and screw the 3/4″ to the joist and 1/2 ” with no glue. The finish floor will be ceramic tike.
Discussion Forum
Discussion Forum
Up Next
Video Shorts
Featured Story
Learn more about the benefits and compliance details for the DOE's new water heater energy-efficiency standards.
Featured Video
How to Install Cable Rail Around Wood-Post CornersHighlights
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.
Replies
From what I have experienced from remodeling is that it is easier and just as easy to rip up that 1/2" and start anew. that way you don't have to fight all of the problems and mistakes that someone else made.
Thanks
For ceramic tile you need a double layer anyway but what you have to start with is worthless - worse than worthless because it is confusing you.
A floor system is not just in the thickness of the subfloor. The connection between it and the joists needs to be good too. That is why a glued down subfloor has fewer squeeks and the total system is rated higher. I am betting that since this is in humid Florida, some of your existing sub is not only laid wrong but has begun to rot too, from the bottom up where the source of the moisture is.
Take it all up and then you can see where the bad joists are too, and repair them, treat for termites, etc, and glue down a new 3/4" sub. Then overlay that with denshield or another 1/2" underlayment, glued and screwed @ 6-8" OC
Now you've got ####sound solid floor system that the tiles won't bounce, crack, or lift off of.
Excellence is its own reward!
"The first rule is to keep an untroubled spirit.
The second is to look things in the face and know them for what they are."
--Marcus Aurelius
Thanks
Jeff,
I usually tend to overdo things to be safe. If I were you I'd remove what you have now and use PL Premium glue ontop of each joist as you drop the plywood down. Personally 3/4" is fine but I prefere a dbl layer of 1/2" using "screws" to fasten the plywood then I like using Wonderboard rather then any other CBU. Now ya have one solid floor. Course you could do a mud job over wire mesh if you want.
Be a wall
Don't get floored
Namaste
Andy
You don’t complete your inner work before you do your outer work. Nor do you say, "Well, the hell with the inner work: I’ll go do the outer work because it’s so important and pressing." That’s not conscious either. The conscious thing is the simultaneous doing of both. "Ram Dass"
http://CLIFFORDRENOVATIONS.COM