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Old 01-07-2009, 05:16 PM   #16
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Ice dam prevention


Yes, nail through it anywhere but over the metal drip edge.

If there are gutters then yes, you need to heat them with self regulating cable to keep the water flowing to the ground.

As for stopping the melting of snow to prevent the issue, I'm guessing you live where snow doesn't melt, it only evaporates?

Beligerance is not necessary. I answered your question with the truth. There are too may variables to quote a min and max: Drip edge or valley's, How many square feet of coverage, how deep is the over hang, north or south facing, metal or asphalt, metal or asphalt valleys, automatic or manual or both, enough square footage to require separate activation, gutters included.... with zoned controls, ??? etc, etc...

If you don't want anything electric under your roofing, that's fine. The question I have is when you get a call from a potential client who has ice dams and water damage, do you tell them they should have contructed it to your liking and good bye? What's wrong with having an answer that fits the problem that actually works?

Where the problem exists, there is an answer, is all I'm saying.

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Old 01-07-2009, 05:35 PM   #17
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Ice dam prevention


no one`s belligerent,my customers have no problems with my solutions,the point is that with builtup snow,melting from the bottom up helps feed the water problem,NY gets about as bad as it gets in the US
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Old 01-09-2009, 06:47 AM   #18
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Ice dam prevention


Good website to understand ice dams and their cause...
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Old 01-09-2009, 09:55 AM   #19
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Ice dam prevention


i think its a better solution that zig zag heat cables clipped onto the roof if heating to get rid of ice dams is your only solution
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Old 01-15-2009, 06:48 AM   #20
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Ice dam prevention


better to staple foam channels under the roof,and spray foam the roof rafters full of foam to keep the roof cold,so the Ice dams don`t form,and they melt off from the sun,from the top down

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