|Posted by ray on March 08, 19101 at 12:58:40:|
|In response to Re: mortar bed on plywood subfloor, 2nd story bathroom|
: : Terry,
: : I've done many handy-man jobs, including a previous bathroom remodel. In that job, I used dur-rock on top of the plywood floor. Unfortunately, the floor was not very level and I am unhappy with the result. So, I am going to proceed with a mortar bed on my masterbath job. Based on the reading I've done (to include a msg on you site), here is how i am going to proceed. I'd like any feedback you might have:
: : a. Felt paper (the stuff you use on a roof) laid flat on the plywood subfloor.
: : b. Metal lathe/meshing on top of the felt paper.
: : c. Sand to cement ratio of 4:1 (per a response you provided, the sand/cement mixture should "look and feel much to dry to use" and should be able to "pack like a snowball").
: : d. Screed the sand/cement misture level.
: : Questions:
: : 1. Do I staple the felt paper to the plywood? (thinking no since staples will puncture the barrier).
: : 2. Do you pack the mortar bed down forcefully (thinking using an trowel and applying good pressure).
: : 3. Do I need to "raise" the metal messing above the floor, so that, for example, the messing is more toward the middle of the mortar bed?
: : 4. What do you use to "texture" the surface of the mortar bed?
: : Thanks,
: : Ray
: Staple the lath down through the tar paper. Don't worry about the holes. It's a moisture barrier, not waterproofing.
: Everything else is okay, except "texturing" the mud. I don't understand that.
I didn't express my "texture" question very well. When I screed the mortar bed and use a trowel to pack it down, I'm assuming the surface of the mortar will be realtively smooth - so my thinking was to texture it (similiar to what is done with concrete driveways when a pushbroom is run over the concrete towarnds the end of the job to give it texture) - the thinking being that the thinset I use will adhere better to a textured survace as opposed to a smooth surface. Perhaps I don't need to worry being that the mixture is 80% sand and will have a texture to it with adding addl "texture".
Any recommendations on the type of trowel (size) I should buy?
I greatly appreciate you taking time out to answer my questions.
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