If you want to know why it s because it pretty much doesn t matter what the subfloor is under that plywood.
Do you need durrock under tile if have vinyl subfloor.
Arrange the plywood on the first layer of wood.
The best method is to refasten the subfloor then add a layer of plywood.
Do not line up the second layer with joints in the first layer.
In most cases as long as the old vinyl surface is flat you don t need to do anything more for this type of underlayment.
You can have 5 8 osb and 19 2 oc joists and it still works.
However you re not out of the woods.
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.
According to backer board manufacturers and tile setters installing backer board directly over an old solid.
Concrete and wood subfloors each have their own subfloor preparation.
A subfloor is the bottom most structural level of your floor.
Concrete expands and contracts and that type of movement can also crack the tiles and the grout.
When you install your vinyl on a wood subfloor the top plywood should be a minimum of 1 4 thick.
For more information download our pdf about types of subfloors.
Wooden subfloors in older houses need to be strengthened and stabilized before backer board and tile are installed.
It supports your decorative floor finish whether it s carpet hardwood vinyl laminate or tile.
For most subfloors you will need to add an extra layer of wood.