We currently live in a two story home with a 9/12 pitch roof. There is a 1/2 " plywood deck covered by 15lb paper and 25 year shingles. I have 2 questions.
1. We are currently tearing off the old shingles and replacing with 50 year shingles. The contractor is not tearing off the old 15 lb paper and is covering with another layer of 15 lb paper. He tells us it is not necessary to tear off the old.
What do you think?
2. We are also installing ridge vent and tearing out the old "turtle head" vents. There is also one gable end vent at the peak. The contractor also advises that soffit or eave vents are in order. We did not have them before. What he says does make some sense.
Do we need the other vents in addition to the ridge vent?
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