getting ready to tile ,do you trowel on a coat of thinset before laying your hardibacker board before screwing down? i’ve heard both ways, but what spooks me is if you ever decide to tear up the tile and you have glued the board down to the subfloor,your in one heck of a mess.on the other hand i can see where it gives the hardi board even support. thanks larry
hand me the chainsaw, i need to trim the casing just a hair.
Replies
I've always used thinset to put the backerboard down (along with the screws).
We are talking about floors, right?
Rich Beckman
Another day, another tool.
after i posted i thought oh yeah should of put "floors". thanks, i think thats what i'll do is glue and screw it down,if i get tired of it someday i'll get the sledge and saw out!thanks larryhand me the chainsaw, i need to trim the casing just a hair.
The purpose of the thinset is not to "glue it down", but rather give it a bed that has 100% contact with the subfloor.
Backerboard is "brittle" the if the floor is not PERFECTLY FLAT then all of the pressure will be on one small part that can crush.
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The purpose of the thinset is not to "glue it down", but rather give it a bed that has 100% contact with the subfloor.
I beg to differ, it is to do both. Even if the subfloor was 100% smooth, it is still best to "glue" the CBU down. If not, the 2 layers (subfloor + CBU) can still flex independently under load, even slightly so. When fastened together with both thinset and screws, they make a stiffer, monolithic backer.
I beg to differ
Beg all ya want ... but Bill is right.
Jeff Buck Construction
Artistry in Carpentry
Pgh, PA
I always mix up a batch of thinset that'sd a little wetter than normal, cuz I don't want to worry about trying to get the hardie forced into place. I want the thinset to ooze slightly and fill in all the voids.
Read the instructioins ... I seem to remember something aboiut using straight (unmodified) thinset rather than latex modified. Something about time or something.
I'm sorry, I thought you wanted it done the right way.