Do I Need A Vapor Barrier Under Carpet

See what goes into waterproofing a basement too.

Do i need a vapor barrier under carpet.

You only need to worry about the moisture barrier when it comes to a concrete subfloor so you do not need one in this case. The felt paper is a good option for hardwood but since you re nailing the hardwood down you do not need a foam underlayment. If you use one it is no harm but you don t really need it. It seems your products are used mostly between the ground and the concrete slab.

But what was done was that a vapor barrier was stapled to the bottom of the subfloor apparently prior to putting down the subfloor since. Any kind of persistent moisture will allow mold to get a foothold and soon ruin carpet or wood flooring. After the insulation is in place you will want to add a vapor retarder sometimes called a vapor barrier if you need one. A vapor retarder is a material used to prevent water vapor from diffusing into the wall ceiling or floor during the cold winter.

The crawl space has a scratch coat of cement on the floor. Do you know if there are any contra indications to putting the vapor barrier on top of the concrete to separate it from the carpet pad. Any of our vapor barrier types of products can be used in this application over the concrete slab. Not every wall does.

For a dry mold free finished basement floor always install a vapor barrier before laying a wood subfloor or carpet pad. Installing a moisture barrier underneath your carpet is a always a good idea. Before one can make the best decision regarding whether or not to place a vapor barrier under a concrete floor slab on grade it is important to understand the sources of moisture how it moves through the slab and how it adversely affects certain floor coverings adhesives and coatings.