Ice Dam Prevention?

[ecduzitgood]

Ice and water sheild from drip edge up full width of roll any less is a wast of time. Facia should extend about an inch beyond soffit acting as a drip edge. No ice and water sheild on either just the roof. If your not re-roofing it really isn't worth doing unless your comfortable splicing the row of shingles into the existing shingles mid roof to replace the 4'+ of shingles fellt etcetra down to plywood sheathing (ice sheild must adhere directly to the sheathing). you remove to install the ice sheild. I went with better insulation in the attic and installed the ice dam cable. Measure the length and roof overhang so you can check the chart for proper length of cable on the box or web. Frost king
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