![PermaBase CB23140500 Underlayment, 5 ft L, 3 ft W, 1/4 in Thick, Cement/Plastic, Gray [SKU: ORG5298708]](https://cdn11.bigcommerce.com/s-iqof5nfcfj/images/stencil/600x600/products/21074/21003/5298708__68328.1691780498.jpg?c=1 "PermaBase CB23140500 Underlayment, 5 ft L, 3 ft W, 1/4 in Thick, Cement/Plastic, Gray [SKU: ORG5298708]")
![PermaBase CB23140500 Underlayment, 5 ft L, 3 ft W, 1/4 in Thick, Cement/Plastic, Gray [SKU: ORG5298708]](https://cdn11.bigcommerce.com/s-iqof5nfcfj/images/stencil/1280x1280/products/21074/21003/5298708__68328.1691780498.jpg?c=1 "PermaBase CB23140500 Underlayment, 5 ft L, 3 ft W, 1/4 in Thick, Cement/Plastic, Gray [SKU: ORG5298708]")
Product Overview
Cement board underlayment is a rigid substrate made of Portland cement, aggregate and glass mesh that provides an exceptionally hard, durable surface that is able to withstand prolonged exposure to moisture. [QTY/UOM: 1EA / 1EA]
![PermaBase CB36120500 Backer Board, 5 ft L, 3 ft W, 1/2 in Thick, Cement/Plastic, Gray [SKU: ORG3020575]](https://cdn11.bigcommerce.com/s-iqof5nfcfj/images/stencil/500x659/products/21072/21001/3020575__95114.1691780497.jpg?c=1 "PermaBase CB36120500 Backer Board, 5 ft L, 3 ft W, 1/2 in Thick, Cement/Plastic, Gray [SKU: ORG3020575]")
![PermaBase CB36580500 Backer Board, 5 ft L, 3 ft W, 5/8 in Thick, Cement/Polystyrene, Gray [SKU: ORG0561464]](https://cdn11.bigcommerce.com/s-iqof5nfcfj/images/stencil/500x659/products/21071/21000/0561464__37274.1691780497.jpg?c=1 "PermaBase CB36580500 Backer Board, 5 ft L, 3 ft W, 5/8 in Thick, Cement/Polystyrene, Gray [SKU: ORG0561464]")
![Eaveguard HE740916 Roofing Underlayment, 65 ft L, 3 ft W, Asphalt [SKU: ORG6463194]](https://cdn11.bigcommerce.com/s-iqof5nfcfj/images/stencil/500x659/products/76410/74704/6463194__31159.1692631657.jpg?c=1 "Eaveguard HE740916 Roofing Underlayment, 65 ft L, 3 ft W, Asphalt [SKU: ORG6463194]")
![Eaveguard HE740915 Roofing Underlayment, 33.3 ft L, 3 ft W, Asphalt [SKU: ORG7429020]](https://cdn11.bigcommerce.com/s-iqof5nfcfj/images/stencil/500x659/products/76411/74705/7429020__48691.1692631657.jpg?c=1 "Eaveguard HE740915 Roofing Underlayment, 33.3 ft L, 3 ft W, Asphalt [SKU: ORG7429020]")
![Henry HERF200916 Roofing Underlayment, 65 ft L, 3 ft W, Polyethylene, Blue [SKU: ORG0940056]](https://cdn11.bigcommerce.com/s-iqof5nfcfj/images/stencil/500x659/products/10404/10548/0940056__52314.1691776696.jpg?c=1 "Henry HERF200916 Roofing Underlayment, 65 ft L, 3 ft W, Polyethylene, Blue [SKU: ORG0940056]")