Guest User
Thanks in advance for any help. I have an old apartment building (1930s) that is going to need a new roof. Design is such that there is no room for soffit venting and I have ice dams. Current roof is asphalt shingles. 10/12 0r 12/12 pitch. Would vertical 2x4s with horizontal striping of 1x4s give enough venting to prevent ice dams? I would need venting at bottom and at ridge. Has anyone done this and had it function? Thanks Charley
Eric Novotny
An informed customer is the Best Customer!
That certainly would vent the roof. If the dams are that bad, I would look at incorporating some rigid foam over the current roof sheathing to further mitigate the heat loss.
Guest User
I am currently researching metal roofs as I want to have metal installed over my architectural shingle roof. Do I need both furring strips (if the system requires furring strips) and underlayment? My roof decking is nearly 30 year old OSB, does this present a problem for a metal roof? I have heard some nightmare stories about condensation rotting the roof if a metal roof is not properly installed, what is the best way to avoid moisture related problems. Where can I find specific instructions? How do I know if the roofing contractor is installing correctly and in accordance with manufacturer's specs? Is a standing seam roof more durable than a thru-fastened system? The contractor that provided an estimate plans to use 29 gauge galvalume that is unpainted (galvanized look). Is this as durable as painted metal and should I have an option for heavier gauge? I am feeling a bit overwhelmed and will be buying a book to help answer some of my questions. Any suggestions for a good book that will help me to learn the basics of what I need to consider and watch for? I feel I need to be educated enough to know if the contractor is blowing smoke or shooting straight. Thanks!
Todd Miller
Isaiah Industries, Inc.
Hello. I understand your feeling overwhelmed. I actually do have a book I can send you (no charge), published by the Metal Roofing Alliance. Please email me with your address if you'd like it. I can also send you an article I have written. My email is [email protected] Additionally, here is a link to a blog post of mine about this question of whether the old shingles should be removed:

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