After about an hour of scraping moss under a pounding sun -- it was very warm here yesterday, and won't be much better today -- Lisa had to call it a day. She just barely got down from the roof, and was trembling with what looked like signs of heat exhaustion. Even with the safety lines and harness, this work is very stressful. I'd volunteer to do it myself, but we're concerned that the roof might not support my additional weight.
The plan is, once we get enough moss cleared, for Lisa to nail down wooden strips -- you can see the first one in this video -- and staple plastic to them, then apply goop to that to try and keep the water off of the damaged section of roof when the rains return, which won't be too long from now.