Vapor Barrier Over Plywood Subfloor

You can meet the vapor barrier requirement by stapling 6 mil plastic sheeting or tar paper to the subfloor but there are better underlay options.

Vapor barrier over plywood subfloor.

This 2 in 1 underlayment will allow your laminate flooring to float while correcting any minor subfloor imperfections and will protect your floors from moisture. Use vapor barrier 2 in 1 when installing laminate flooring on cement subfloors or any subfloors with a risk of moisture coming up. You can purchase foam or vinyl underlays with built in vapor protection. If i m understanding you the vapor barrier is just beneath the subfloor but on top of the joists.

Drybarrier is a modular subfloor tile system made from thermoplastic elastomer and is used on concrete as a subfloor for below grade slab on grade and suspended slab construction. Select 2 to 4 items to compare. You want the vapor barrier on the warm in winter side. But check the flooring instructions to find out if your home needs a moisture barrier between the subfloor and plank.

You don t need 6 mil poly above the plywood. What you need is closed cell spray polyurethane foam on the underside of the plywood to provide a vapor retarder and insulation layer to separate the plywood from the humid crawlspace below. The visqueen acts as a barrier between the flooring and the sub floor and allows the vinyl planks to float above the sub floor and smoothly expand and contract with the temperature and humidity changes in your home. Do i need a vapor barrier between the floor joist and the plywood.

Vapor barrier 2 in 1 underlayment. This is also an extra piece of protection if you have any water leaking underneath the vinyl planks. Set your store to see local availability add to cart. Mike in victoria writes i m putting a new subfloor on a pier and beam foundation.

If you have a plywood subfloor over a concrete slab check the moisture level of both floors. They provide sound and thermal insulation as well as moisture protection. The house was built back in 1926. Acoustical underlayment w vapor barrier for luxury vinyl flooring 54 pack model qwlv100 2 430 00 roll 2 430 00 roll free delivery.

View all tools materials. Underlayment and moisture vapor barrier as required by the manufacturer. Then we are applying a 6 mil polyethylene vapor barrier over the entire area which will be covered by 3 4 inch plywood underlayment a carpet pad and carpeting. We are also considering topping off the rigid insulation about 1 1 2 inches with loose fill insulation as normally used in attics.