alternatives to wonderboard for tile?

Question

I want to lay tile in my mobile home, and I want a cheaper alternative to wonderboard for the tile that I want to install. My home is on a concrete foundation tied down and the flooring is solid I'm just concerned with the tile not sticking to the osb plywood. Any serious answers would be appreciated

Answer 1

Tile will stick to plywood just fine. People use wonderboard for a couple of reasons. First, if the surface can get wet (like a bathroom floor or a shower wall), the wonderboard will not get damaged by water that might seep between cracks in the grout. Second, wonderboard is less flexible than wood for a given thickness. For a wood subfloor, any flexing can lead to cracking of the grout and/or the tiles.

If the wood is thick enough (1/2 to 3/4 inches) and firmly secured to the subfloor with lots of screws, it shouldn't flex to the point where the tile or grout is damaged. If it does crack later on, you can always regrout the damaged areas.

Answer 2

Unfortunately, there is no "cheap" solution to this issue. While other products are available, they will all meet, or exceed the cost of cement board (wonderboard). Laying tile onto plywood is not recommended, however it can be done. The problem with laying onto plywood directly is that over time the plywood will compress, which will lead to eventual cracking of tiles and grout. Plywood also carries vibration better than wonderboard, which can lead to cracking again. The tiles will stick to plywood, however, you do run the risk of cracking tiles. Personally, I use a product called Ditra. It is a waffle patterned membrane that prevents cracking due to minor floor movements, and creates a waterproof barrier under the tiles.

If cost is your worry, remember that a new, nice looking tile floor will add re-sale value to your home, and you will recover your costs.

Answer 3

1-1/4 thick of plywood. not osb or k3 board, but real plywood (2 layers 5/8th thick. then, when you lay your tile, use a polymer-modified thinset mortar, instead of a dry-set mortar. they have a powdered latex additive that helps it bond well to the plywood. of you look at the back of the bag it will tell you if it will stick to plywood.

Answer 4

Luan is a good alternative if its going to be on the floor. it might be a good idea to put a primer down as well.