Subscribe or Renew Membership Subscribe Renew

TILING AN OUTDOOR DECK

RGENIE's picture

HOW DO I WATERPROOF AN OUTDOOR PLYWOOD DECK SO THAT IT WILL ACCEPT A CERAMIC TILE OVERLAY?


GENE R.


Edited 12/17/2003 11:12:25 PM ET by GENE

(post #175245, reply #1 of 8)

Gene,

This is a good technical question for the folks over on Breaktime, and I strongly suggest you ask it over there as well. However, from what I have gleaned from reading Breaktime, you don't want to tile directly onto plywood, you need a substrate that is masonry based such as a mud base or concrete backer board. The reason is that wood products move more and at a different rate, so your tiles will pop. If you want to protect the plywood from water, then you might consider doing your tile like you would for a tiled shower pan. Another thing to consider, if you haven't already built the deck, is to use pressure treated plywood. That way, if your protection of the ply is imperfect, then it will still be resistant to rot from moisture that makes its way past the tiles.

Good luck, and don't forget to post pictures of the work in progress!

(post #175245, reply #2 of 8)

A plywood deck? You mean a subfloor or an out door deck made of plywood?


Never saw such a thing before.


How long has it been to the weather? Is it CDX, Advantech????


As long as its at least 3/4" CDX you should be able to use Wonderboard thinset and screwed to the top of the ply. Wonderboard is "made" for out door use unlike a lot of CBU's.


Is there adaquit ventilation below it?


Be sure to seal all the exposed edges as well and be sure its pitched at least 1/8" per foot for drainage.


Take pictures to post here.


BE floored


                 andy


My life is my practice!




http://CLIFFORDRENOVATIONS.COM

(post #175245, reply #3 of 8)

Andy,

Where my dad lives in FL, they sell pressure treated plywood. Don't know too much about it, and I probably wouldn't use it on a horizontal surface, but I'd guess that some folks do.

(post #175245, reply #4 of 8)

Wouldnt hurt!

My life is my practice!




http://CLIFFORDRENOVATIONS.COM

(post #175245, reply #7 of 8)

Andy, I use PT Ply here all the time.

Use it with a vinyl deck coating, fine. With tile, uh-uh.

Use the same system you would for a house. Ply, cement board, tile, thinset in between.

Quality repairs for your home.


Aaron the Handyman
Vancouver, Canada


 

Quality repairs for your home.

AaronR Construction
Vancouver, Canada

 

(post #175245, reply #8 of 8)

Aaron


        As Cloud said.


Use Ditra over the ply.


Its 100% water proof. Expensive but waterproof


Be well


           Andy


My life is my passion!




http://CLIFFORDRENOVATIONS.COM

(post #175245, reply #5 of 8)

  If you want to put tile on a plywood deck, I would be very warry.  The plywood is going to pick up water and expand and contract over time which is going to destroy your thinset holding the  tile down over time and crack your grout.


  Your going to need something waterprrof between the tile and the plywood.  You could try a waterproof membrain, or just screw down cement board to the plywood and tile over that.


Do it right now and the time you spend working on the deck in the future will be much less. 

(post #175245, reply #6 of 8)

Use something like Schlüter Ditra.