View Historical Standards for D227/D227M:

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Document Designation and Title Year Select Item(s) D227 Standard Specification for Coal-Tar-Saturated Organic Felt Used in Roofing and Waterproofing 03 D227 Standard Specification for Coal-Tar-Saturated Organic Felt Used in Roofing and Waterproofing 97a D227 Standard Specification for Coal-Tar-Saturated Organic Felt Used In Roofing And Waterproofing 81