ice wires vs ice belts?

jeffw_00August 10, 2011

Hi - granted that either should be a last resort, I'm wondering what people think of these 2 options. From what i read, home-improvement-store ice wires are cr-p, and professional-grade/installed are pricer than the ice belts (which is a 3' strip of aluminum). My roofer likes the wires, I like the belts because the belts are passive. My roof, however is barely 1-4 pitch, so I'm not 100% sure the belts will work. (I have really BAD ice dams on my 24' overhangs - it's like the roof was -designed- for ice dams there).

thanks in advance!


Thank you for reporting this comment. Undo

Ice dams are always caused by warm air beneath the roof deck. The problem is not your overhang, it's above it. There snow melts, then runs down to the eaves and freezes, then backs up under the shingles.

Retrofitting attic insulation and putting an ice and water shield type product on the entire roof deck before shingling are possible solutions for the future. For now, I'd avoid any sort of electrical device and give the metal belts a try. They should help considerably if they receive some direct sun exposure. (There is a bit of danger from falling ice to consider). It's difficult work, but using a roof rake from the ground to remove snow can also make a difference.

    Bookmark   August 11, 2011 at 5:50AM
Thank you for reporting this comment. Undo

Yes,yes - roof has a low pitch. attic is insulated as best it can be (some areas can't be), ridge/soffit vents are in place, along with 12' of Ice/water barrier (which unfortunately, might have some places where they nailed -through- the boards (sigh)). Where the ice falls isn't a problem. I know I could rake, or do ice wires, but I prefer a passive solution (i'm too old to be raking 8-])


    Bookmark   August 11, 2011 at 9:43AM
Thank you for reporting this comment. Undo

Insulation will not address the air loss unless you have a thick blanket of cellulose or spray foam.

The attic needs proper air sealing and I would be willing to bet your ice damning issues will drop to nil.

Spray foam sealing of all the top plates, bypasses, ductwork, and other air leakage locations will go a long way.

Even with a low slope roof, you can spray foam that outside top plate in most cases and get a good enough R-Value on it that the attic ventilation will take care of any radiant heat loss.

    Bookmark   August 22, 2011 at 6:05PM
Sign Up to comment
More Discussions
Insulating an inaccessible crawl space?
My 1940s bungalow style house sits on a crawl space...
Settling crack been repaired by 6 people - any advice?
Our house is 25 years old. The foundation was put in...
Metal fence panels - steel or aluminum? Best brands?
I want to put up a fence to divide my side yard from...
Siding advice for chimney
Hello and thanks in advance for any advice. Yesterday...
2x8 Joists are 1.75x7.75 and 2x6 Joists are 1.75x5.75? why is this?
I know that lumber is smaller than actually stated...
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™