Code of Massachusetts Regulations
780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
Chapter CHAPTER 34 - EXISTING BUILDING CODE
Part 1 - SCOPE AND APPLICATION
Section 307 - SMOKE ALARMS
Subsection [BS] 705.2.1 - Roof recover

5. For roof replacement and roof recover projects, where the existing roof assembly includes a built-up roof that is adhered to the roof deck, the existing built up roof shall be permitted to remain in place and be restored to good condition to serve as a sound substrate for the new roof covering, in accordance with the roof manufacturer's requirements.

6. For roof recover projects where there is only one layer of existing roofing present, existing continuous insulation shall be permitted to remain in place, provided all wet or otherwise deteriorated portions of the insulation is removed and replaced.

Revise section as follows.