Getting snow guards for slate roof--any tips/lessons?
I'm 120 years into a 200 year slate roof. I can't believe it doesn't have snow guards; in one place there is a run from the high peak above the third floor to the eaves of the first floor porch; easily over 25' at 45+ degree angle. Watching snow slide off that baby was like watching a space shuttle launch, well, upside down I guess. But dramatic. Shrubs around these areas break branches every winter. Gutters nearly ripped off and leaking.
So, I want to get snow guards. But I'm wondering, which ones. And how do I know the installer won't damage surrounding slates in the process? I'm tempted to get the slate bible and diy. At least I'll care.
So, any advice/reflections would be appreciated, and recommendations for installers if you live in the greater boston area. tia