Solar power generation roof slope waterproofing

Roofs with a pitch below 2:12 (low-slope roofs) will use waterproofing membranes. The two common types are asphaltic “built-up-roofing” or “single ply membranes” made from plastic or rubber sheets. [pdf]

Home solar power waterproofing

Because solar panels have been exposed to the elements for several decades, they need to resist water damage as possible. All home solar panels are waterproof. [pdf]