Dry Pack Over Finshed Radiant Heat

ts tile

hi, im having trouble finding the proper solution for this install. im working with a concrete floor that has radiant heat through it, the home owner wants to raise the floor 3/4 of an inch befor tiling. should i dry pack, and if so how do i put the wire lath down/ should i modify my dry pack?

ts tile

is there another method?

Bud Cline

Your suggestion is your best-bet I think. Lay the metal flat and cover it over, it will be just fine.

ts tile

should i thinset the concrete slab as i dry pack im thinking this might give better adhesion

firemike

Polymer bonding agent? Workes well for regular cement-besed products, I would think it would work with drypak. Might have to put a slurry coat on as you set the drypack, someone else might have an idea.

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ts tile

hey mike, i have heard of people modifying thier dry pack before.im just not sure if this is the right circumstance. and what are your thoughts on laying wire lath befor hand, is it necesary.like i said i cant staple it down

kbtilenstone

just use a slurry mix to get a bond to the existing concrete, and there is no need for lath in this application.

MattCoops

I would definitely use lath. You don't really need to fasten it down.
Just lay it on floor and cover with mud.

You could also use an SLC over the radian heat.

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orson

Do you really want better adhesion considering the amount of movement you're going to get in the concrete substrate due to the radiant heat? I'm seriously asking, not trying to be a wiseacre.

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Bill_Vincent

What he said, including the part about no need for lath. It wouldn't hurt, but it's not necessary, either, if you're bonding to the concrete.

Just in case you don't know-- the slurry that kbtile's talking about is pure portland cement mixed with water. You can either throw water on the floor and then sprinkle dry cement into it and work it in with a broom. or mix it in a pail pisswater loose, and then APPLY it with a broom. Either way, you need to get dry pack on it immediately, before the slurry dries.

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