How tall are the dimples? it seems most brands like home depot alino are 8 mm high. i plan to use as an under layment for plastic in a crawlspace.

I don’t remember exactly. About 1/4” or 3/8”

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💧 Stay dry, stay ahead — the foundation your home deserves!

RADON SYSTEM COMPATIBLE - Boosts radon mitigation effectiveness with reinforced vapor barrier technology.
SUPERIOR MOISTURE DEFENSE - Creates an air gap that blocks moisture and protects your foundation year-round.
ECO CONSCIOUS CONSTRUCTION - Crafted from recycled HDPE, combining sustainability with high performance.
ENGINEERED FOR RAPID DRAINAGE - Dimpled design channels water efficiently from soil to footer drainage systems.
VERSATILE UNDERLAYMENT SOLUTION - Ideal for basement floors under laminate without OSB or plywood, enhancing vapor barrier protection.

Whitecap Dimple Drainage Matting is a 4' x 50' high-density polyethylene sheet designed to improve water movement and provide a robust waterproof moisture barrier. With a combined 45 mil thickness from its dimpled 25 mil mat and reinforced 20 mil liner, it creates an air gap that prevents moisture penetration in basements and underground walls. Made from recycled materials and meeting ICC-AC114 standards, it offers sustainable, durable protection while enhancing radon system efficiency and serving as a versatile underlayment for basement floors.

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Item Thickness	0.05 Inches
Item Form	Sheet
Specification Met	Icc-ac114
Number of Items	1
Manufacturer	Crawl Space DIY
Part Number	DM4X50
Item Weight	13.6 ounces
Product Dimensions	48 x 12 x 12 inches
Is Discontinued By Manufacturer	No
Size	4' X 50'
Style	4' X 50'
Finish	Premium
Item Package Quantity	1

Whitecap Dimple Drainage Matting, 4' x 50' - Improves Water Movement and Drainage - Waterproof Moisture Barrier Foundation Wrap and Floor Underlayment - Vapor Barrier Waterproof Membrane

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