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Does the Quiet Walk underlayment plastic/vapor barrier face up or down when installing? - MP Global Products, LLC
Is it necessary to have a moisture barrier (poly) between a basement concrete floor and wood flooring? - Quora
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QuietWalk 360 sq. ft. x 6 ft. x 60 ft. x 1.4 mm Acoustical Underlayment with Vapor Barrier for All Vinyl Plank Flooring QWLV360 - The Home Depot
![QuietWalk Laminate and Hardwood Acoustical and Vapor Barrier 3-ft W x 33.34-ft L x 3 T Premium Felt Moisture Resistant Flooring Underlayment (100-sq ft / Roll) in the Flooring Underlayment department at QuietWalk Laminate and Hardwood Acoustical and Vapor Barrier 3-ft W x 33.34-ft L x 3 T Premium Felt Moisture Resistant Flooring Underlayment (100-sq ft / Roll) in the Flooring Underlayment department at](https://mobileimages.lowes.com/productimages/cb8708a0-9c49-4892-b6f7-823b8ec4f5b8/11361192.jpg)
QuietWalk Laminate and Hardwood Acoustical and Vapor Barrier 3-ft W x 33.34-ft L x 3 T Premium Felt Moisture Resistant Flooring Underlayment (100-sq ft / Roll) in the Flooring Underlayment department at
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Blue Hawk 3-ft W x 33-ft L x 0.125 T Premium Felt Moisture Resistant Flooring Underlayment (100-sq ft) at Lowes.com
![FLOORLOT BlueStep Underlayment with Moisture Barrier for Laminate and Wood Floors, (200 sq.ft Roll) - Amazon.com FLOORLOT BlueStep Underlayment with Moisture Barrier for Laminate and Wood Floors, (200 sq.ft Roll) - Amazon.com](https://m.media-amazon.com/images/I/71OudwF9YoL._AC_UF894,1000_QL80_.jpg)
FLOORLOT BlueStep Underlayment with Moisture Barrier for Laminate and Wood Floors, (200 sq.ft Roll) - Amazon.com
![MP Global Products 100 sq. ft. Rolls 30 x in. W x 40 x ft. L x 6 mm T Polyethylene Film Moisture/Vapor Barrier Underlayment for All Floors MB006300100 - The Home Depot MP Global Products 100 sq. ft. Rolls 30 x in. W x 40 x ft. L x 6 mm T Polyethylene Film Moisture/Vapor Barrier Underlayment for All Floors MB006300100 - The Home Depot](https://images.thdstatic.com/productImages/79b23942-7917-4c11-8970-cde2bb2d19a3/svn/mp-global-products-underlayment-mb006300100-44_600.jpg)