TOPIC: I Have An Existing Metal Roof and Have A Question
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Now that the snow has come off of my roof and taken out my deck railing, I guess it is time to look at snow guards.
I have an Everlast II, exposed fastener metal roof.
Roof pitch 4/12
Rafter length- 18'
Eave length- 48'
Panel ridge spacing 9"
The roof overhangs the perimeter wall by 3'
Location- N. central NH
I thought when I installed the roof this past fall that, with a 4/12 pitch, the snow would come off gradually. My house is well insulated and the snow only slid off once early in the winter. The rest of the winter's snow came down last night.
I have been looking at various snow guards and Have a couple of questions-
Will putting 100's more screws in the panels have a negative effect with expansion and contraction of the roof?
Do the snow blocks with individual gaskets seal as advertised?
I am worried that if I use the snow blocks that the snow will stay on the roof for the whole season. I put on a metal roof so I wouldn't ever have to shovel it again if the snow gets really deep. Is this a concern?
Would there be an advantage to using snow rails instead of blocks?
I also noticed that my stink pipe has been pushed into a leaning position. would putting snow blocks above it be a good idea?
Thanks for any info you can send my way!
Could have taken out more than the railing.
I would start with the manufacturer of the panel and call them on Monday AM to see what type of snow retention that they either supply or recommend.
I will second Eric's thoughts. Snow often "lets loose" when the sun comes out. If it stays cloudy and dark, this may not happen for awhile. However, the sun comes out and radiant heat passes through the snow load and reflects back out when it hits the metal, creating a slippery situation. I often think of snow management as looking for a way to cause the snow to slide in chunks rather than all in one fell swoop. That said, there are occasions you want to hold it up there until it melts. Yes, snow guards above a pipe can be helpful. I believe your roof already has exposed fasteners? In that case, I'd suggest snow guards mounted to the flats of the panels. Like Eric said, though, see what everlasting has to say.
I reached out to Everlast and am waiting for a reply.
Sounds good. They should get you pointed in the right direction.
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