I'm taking the current bathroom floor to the 5/8" (I think) plank
subfloor. It was recommended to me at Home Depot that I put down 3/8"
plywood and then tile. Should I use backerboard (sp)?
I've found the 1/4" Hardibacker product over an existing plywood
subfloor is a great product for a tile floor and makes a good firm base.
The professionals I've ever talked to recommend no less than that, and
not to use plywood for a base. Of course some of them recommend a
mortar bed if the job lends itself to that, but that's not an easy chore
for an average homeowner and of course that's why the backerboard is so
popular. I've used the 1/2" cement board when it first came out many
years ago, but now prefer the one from Hardibacker.
Thanks for the quick reply. So, I'll strip the floor down to the 5/8"
planks, lay 1/4" ply and then 1/4" backer? Or should the plywood be
thicker? Also, since I won't be tiling under the tub :-), should I
bring the tub flush with the backerboard using plywood?
Wow. That's quite a few layers. Normally you can install the
Hardibacker right over linoleum and particle board underlayment with no
problem. Is the existing flooring pretty hard, or is it springy or
soft? If it's hard/solid I would install the the Hardibacker over it.
I've had good success using mastic and roofing nails for installation.
Screws tend to stick up a smidge and are a bother. The Hardibacker is
very dense and should provide a good stiff underlayment for your tile,
allthough I've never went over that many layers of vinyl or linoleum.
Perhaps you should check their website as to the number of layers you
can install their product over. If you need to remove it and need to
make up space just use their 1/2" product instead of the 1/4"
I just finished ripping out the tile floor in my bathroom because the
builder set the tile directly onto plywood underlayment. At every seam
between sheets of plywood, the tiles had cracked because of seasonal
movement of the underlayment. I replaced the 5/8 plywood with 1/2"
Durock and 1/4" Hardibacker (I didn't want the floor height any lower
than it was for cosmetic reasons).
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