Vapor Barrier Over Plywood Subfloor

Do i need a vapor barrier between the floor joist and the plywood.

Vapor barrier over plywood subfloor.

In a cold climate it s fine where it is. Set your store to see local availability add to cart. We are also considering topping off the rigid insulation about 1 1 2 inches with loose fill insulation as normally used in attics. What you want to do is keep the plywood dry.

This is also an extra piece of protection if you have any water leaking underneath the vinyl planks. The tiles snap together in a stack bond or running bond pattern providing a vapour barrier with a 1 4 air space between the concrete and finished floor. Underlayment and moisture vapor barrier as required by the manufacturer. If i m understanding you the vapor barrier is just beneath the subfloor but on top of the joists.

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. 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. Select 2 to 4 items to compare. View all tools materials.

If you have a plywood subfloor over a concrete slab check the moisture level of both floors. You can purchase foam or vinyl underlays with built in vapor protection. 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. Vapor barrier 2 in 1 underlayment.

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. You don t need 6 mil poly above the plywood. Use vapor barrier 2 in 1 when installing laminate flooring on cement subfloors or any subfloors with a risk of moisture coming up. You want the vapor barrier on the warm in winter side.

They provide sound and thermal insulation as well as moisture protection. 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. The house was built back in 1926. But check the flooring instructions to find out if your home needs a moisture barrier between the subfloor and plank.