Is there a need to use 1/2" backerboard under ceramic tile? I would
like to keep the difference between flooring heights to a minimum and
1/4" backer would help. I'm putting 12x12 ceramic on top of 3/4 T&G
plywood which is nailed and glued to 2x10 joists 16"o.c. Is 1/4 backer
thick enough? TIA, Mark
You only need backerboard if you are going to use a cement based mortar
(thinset)... If you are using mastic instead, you don't need backboard...
With regards to 1/4" vs 1/2", if it is screwed and glued sufficiently to the
plywood subfloor, you should be able to use a thinner backerboad and it be
acceptably sturdy... Personally, I believe that the 1/4" Hardy product feels
sturdier than the 1/2" concrete and fiberglass mesh product... Still, except
for perhaps walls and countertops, I'm not a big believer in putting tile
anything other than a concrete foundation... A house that I used to own had
ceramic tile in the 2nd floor bath and I spent a lot of time periodically
repairing it when a tile or two came loose... It was over plywood, not
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.