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CertainTeed DiamondDeck 5.5-in x 4-ft 1000-sq ft Synthetic Roof Underlayment in the Roofing Underlayment department at Lowes.com
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Shop RELIABILT + CertainTeed Roofing Starter Bundle: Underlayment, Shingles and Accessories at Lowes.com
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CertainTeed RoofRunner 48-in x 250-ft 937.5-sq ft Synthetic Roof Underlayment in the Roofing Underlayment department at Lowes.com
![Shop RELIABILT + CertainTeed Roofing Starter Bundle: Underlayment, Shingles and Accessories at Lowes.com Shop RELIABILT + CertainTeed Roofing Starter Bundle: Underlayment, Shingles and Accessories at Lowes.com](https://mobileimages.lowes.com/productimages/dfa37cee-0833-47a9-a70f-f12fb02f4fe2/62884557.jpg?size=cdp)