Roof Repair: Pitch Pockets
A pitch pocket is a sheetmetal pan that is installed on a roof so a chimney brace or antenna pole base can be waterproofed. The end of the brace or pole is set into the pitch pocket and bolted down to a rafter or beam, then the pan is filled with long lasting, non-hardening mastic. I generally use flat roof "cold application glue" as it is very sticky and will last a long time poured on that thick. I always cover the mastic with granules matching the roof color, to protect the top of it from the sun. This little trick will double the life of the pitch, which is a bear to dig out 20 or 30 years later when it has finally hardened and cracked.