Installing Tile Over Floor Trusses

There is a slight trampoline effect on the existing carpeted floor and i am concerned that it will affect the tile installation.

Installing tile over floor trusses.

The substrate is 23 32 plywood. However you re not out of the woods. Our installs usually required us to rip out the sub floor and replaced with 1 1 8 advantech and that gave us the minimum deflection requirements. To reduce deflection of the sub floor and minimize cracking of the tile.

Most sources say that sub floor for tile should not span more than 16 in. Prepare the surface for installation. The builder has recommended hardwood over tile for the job but thought a 3 8 or inch piece of plywood with ditra on top would also suffice. First clean and then sand the surface of the old tile until it feels rough.

A couple other considerations are the on center o c spacing of the trusses. It s all about deflection as stated above. Unlevel floors can eventually cause both layers of tile to crack the following steps are helpful tips when installing tile over tile. Concrete expands and contracts and that type of movement can also crack the tiles and the grout.

It measures 12 by 24 and the space below is finished so i can t access the joist. Floor trusses replace the traditional floor joist system and serve the same purpose. Another necessary precaution is to make sure your floor is level before installing new tile. I want to put 12 ceramic tile over a floor that has truss type floor joist on 24 centers.

I did have a general question about a tile job i am considering for my sunroom. Tile loads are usually higher than 10 psf so chances are your trusses were not designed to account for this. When installing a ceramic tile floor on a concrete subfloor you don t have to worry about flexing as long as the concrete slab is at least 1 1 8 inch thick which most slabs are. While joists consist of solid dimensional lumber trusses.

But a number of precautions must be taken to ensure a successful installation. While most floor tile these days is installed onto a layer of cement board or similar backerboard it is possible to lay tile directly over plywood. Steps to installing prefabricated floor trusses. My local tile shop is.

The situation i am running into is the space between the joist.