COMMUNITY FORUM

Tom Smeal

02:49AM | 03/18/04
Member Since: 02/02/04
13 lifetime posts
Bvflooring
I just installed 1/2" wonderboard over our 5'X 5' bathroom floor (excluding bath/shower). Is it advisable to install 15lb roofing paper on top of the wonderboard before installing the new 12"X12" ceramic floor tiles?

I plan to seal the grout of course, but I just want the extra protection while I have the opportunity.

Thanks for any advice.

Tom


floorguyforyears

05:34PM | 03/18/04
Member Since: 03/15/04
28 lifetime posts
Don't think I've ever heard that suggestion, and don't know why you would think you need it. The backerboard is resistant to moisture. It will not deteriorate even when submerged. You're also going to have a layer of thinset that is basically a solid bed of cement over it, and then tile. If you're really concerned that moisture could soak into the plywood thru all that, and for your peace of mind, I would suggest you use a product like RedGuard. It's available at H.*me D.ep*t and is a roll-on waterproofing and anti-fracture membrane for ceramic tile.

Tom Smeal

03:42AM | 03/19/04
Member Since: 02/02/04
13 lifetime posts
The roofing felt idea came from a tile book I bought. It was suggested, along with the Red Guard option you mentioned.

Thanks for the advice.

tom


zanger

08:31AM | 07/06/07
Member Since: 07/05/07
1 lifetime posts
i've heard that i should not use both roofing felt behind my backerboard and Red Guard on top. Something about mold development. Could you weigh in on this? I am working on a the walls surrounding an existing tub. Thought this would be the best way to ensure a waterproof wall.

Tileguybob

07:39PM | 07/06/07
Member Since: 07/03/05
283 lifetime posts
By doing what you talked about you are encapsulating the cement board with no ability for it to breathe and exhaust any moisture buildup that might occur. There is still air between the cement board and the roffing paper. Condensation could occur when one side of the board gets warm while the other side stays cold. Cement boards do not promote the growth of mold as they are not a food source like a gypsum board would be. But other contaminents on the board or in contact with it could create an issue.

If you are doing a steam shower the paint on waterproofing should cover the cement board as you dont want steam vapors to collect behind the board. A regular tub/shower is usuually waterproffed from behind the board. Actually waterproofing is a misnomer because once a nail punctures the roofing paper or plastic sheet it is no longer waterproof. At that point we consider them to be moisture retardent.
Click_to_reply_button
Inspiration_banner

INSPIRATION GALLERY



Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply_choose_button

captcha
type the code from the image

Anonymous

Post_new_button or Login_button
Register

Even if you turn off your electronics whenever you're not using them, they continue to use energy until you unplug them. S... Filling an underutilized area beneath the stairs is a smart way to save space. Doing so with a stash of wood, however, is ... For some decorative recycling, consider burying old bottles upside down to create edging for your garden beds and walkways... Chocolate-colored walls and large window frames allow the exposed wood beams to take center stage in this small screened p... If you're not crazy about the idea of commingling plants and pool, this modern variation may be more to your liking. The s... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... Filling an underutilized area beneath the stairs is a smart way to save space. Doing so with a stash of wood, however, is ... Like no other floor type, a checkerboard design works wonders to underscore the retro kitchen theme. Vinyl flooring, ceram... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... For the cost of a can of exterior paint , you can totally transform your porch. Paint the floor a hue that complements yo... In this urban apartment, a standard-issue patio became a serene and green perch by replacing the typical concrete with gro... If you put the washing machine in the mudroom, you can stop the kids from walking through the house in dirty, grass-staine...
Follow_banner_a
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon
 
webapp2