Best Moisture Barrier Underlayments

Thermopanel AFPROMAT Decoupling Membrane Anti-Crack Waterproofing Sound-Proofing Vapour Barrier Underlay Insulation Underlayment for Ceramic and Stone Floor Tiles (10m x 1m Roll)

Royale Sonic Gold 5mm - Acoustic Underlay for Wood or Laminate

Schluter DITRA 1/8" UNDERLAYMENT 150 SQ FT ROLL

30m2 Deal - AcuStick® Supreme 6mm Gold Underlay for Wood or Laminate Flooring - Free Barrier Tape

6mm Super Gold Underlay - for All Wood, Laminate Flooring - Damp Proof Membrane - Great Sound & Heat Insulation - 1m x 15m Roll

QuietWalk Laminate Flooring Underlayment with Attached Vapor Barrier Offering Superior Sound Reduction, Compression Resistant and Moisture Protection (Covers 360 Sq. Ft.)

Crawl Space Vapor Barrier - 10 mil - (10' x 100') - White Plastic Sheeting - Thick Plastic Sheeting, Heavy Duty Polyethylene Film, Drop Cloth Vapor Barrier Covering for Crawl Space, Garden, Basement

3mm Acoustic Silver Underlay for Wood or Laminate Flooring - Foil Damp Proof Membrane - by AcuStick® Brand (15m (1m x 15m))

Prime Unicorn Flooring Underlayment 300 SF

QuietWalk Plus Laminate & Wood Flooring Underlayment (Float, Glue, or Nail) with Vapor Barrier- Sound Reduction, Compression Resistant, Moisture Protection 3'Wx33'4”L Roll (Covers 100 sq ft) QW100PLUS