Roofing Info For Dummies: What things should I know about getting a new roof?
We already have two layers and they will have to be removed. There may be wood damage but I won't know until the shingles come off. I am new at this and I am trying to find out as much as I can. I found one contractor in CheckBook that looks good. What quality of tar paper or sheeting is good? What is a ridge vent? What about an ice dam? Thank you for your help.
WOW, that's allot of info required but I'll give it a go . . .
Yes the two layers HAVE to come off (weight issue). Damaged sheathing will have to be replaced, most roof sheathing made in the last 100 years are still readily available. I prefer 30# felt (tar paper)but my colleagues having been talking about this new product from GP, that's very light and seems to be okay. Ice and water shield should be installed on at least all out edges (eves and rakes). This keeps snow that melts in the sun and re-freezes at night from seeping under the shingles and into the wood(and for the last time people drip edges goes on top of ice and water). Ridge venting is a system that allows air to move in and out of the attic, thus letting the bottom of the sheathing breath. You may or may not need ridge venting, check to make sure you have soffitt vents, if not, you don't need ridge vent, provided you have gable vents (bottom of roof sheathing gotta breath). If not, you (or at lest should) have a venting system installed why replacing the roof.
The best way to tell if you have a god roofer is to see how he/she installs the felt: staples = bad; bottle caps and nails = good.
Hope this helps, please feel free to contact me with further info
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