Do You Put Vapor Barrier Under Tile Flooring

Thanks all for the replies.

Do you put vapor barrier under tile flooring. After working the flooring mfr and your great feedback i have heavily recommended to our client to have the water issue mitigated and that installing a vapor barrier under the flooring material is in consequential and may exasperate the build up of moisture under the sub floor. Always read the flooring manufacturers recommendations and instructions before installing the underlayment. If not level use thin set to level out. Ditra functions as a floating substrate.

There is a clear advantage of using a liquid membrane it is relatively easy to apply over the tile substrate along with the use of a fiber mesh tape you can secure joints and changes of plane. A vapor barrier can be applied or installed over the tile substrate using a liquid or sheet membrane. Installing new flooring is a costly enterprise so you want to get it right the first time around. Actually you may not even need underlayment depending on the product and where you plan to install it.

There are many products available in home centers and hardware stores in liquid form that can be used to cover and protect the concrete slab from the top. This has to be done annually. If you have an older home that may not have moisture barrier protection under the concrete slab you can still add a barrier to protect your vinyl floor from bubbling. If you have no cracks anywhere on the slab you are probably okay.

Vapor 3 in 1 moisture underlayment. You could do a vinyl underlayment that includes a vapor barrier or simply use a vapor block film. How to install vapor barrier on concrete floor under laminate flooring. Vapor barrier 3 in 1 underlayment is perfect for installation under laminate flooring to allow your floor to float and give a moisture barrier.

It also self adhesive which will make installation even quicker. Before rolling out the underlayment be sure to sweep vacuum and remove all debris on the substructure. Avoid harsh detergents as they will yellow your tile and follow manufacturer s directions on cleaning. Since you re on a pier and beam subfloor it would be in your best interest to have a vapor barrier due to moisture being a potential risk under the subfloor.

The ditra will allow the slab to expand while the tile surface remains static. Hi cecily thanks for the question. If you ve chosen to go the vinyl path you re probably wondering about the best underlayment for vinyl plank flooring. No vapor barrier required but clean the cement floor and seal it.