D.C. Municipal Regulations (Last Updated: September 13, 2017) |
Title 12. CONSTRUCTION CODES SUPPLEMENT OF 2013 |
SubTilte 12-A. BUILDING CODE SUPPLEMENT OF 2013 |
Chapter 12-A15. ROOF ASSEMBLIES AND ROOFTOP STRUCTURES |
Section 12-A1507. REQUIREMENTS FOR ROOF COVERINGS
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Insert new Section 1507.18 to the Building Code to read as follows:
1507.18 Hot-applied rubberized-asphalt roofing. The installation of hot-applied rubberized-asphalt roofing shall comply with the provisions of this section.
1507.18.1 Slope. Hot-applied rubberized-asphalt roof membranes shall not be required to have a minimum design slope (0-percent slope).
1507.18.2 Material standards. Hot-applied rubberized-asphalt roofing shall be one-part hot-applied rubberized asphalt and comply with CAN/CGSB-37.50-M89.
1507.18.3 Protected membrane ballasted low-slope roofs. Protected membrane ballasted roof assemblies with a low-slope (roof slope < 2:12) shall be installed in accordance with this section and Section 1504.4. Stone used as ballast shall comply with ASTM D448.