I need some advice on the best way to add insulation to an existing roof made from 2×4’s and how would be the best way to vent it ? The house is in western Mass. so it gets very cold.The attic also is a bedroom.What about SIP’s? Is there a product out there to create a vent channel under the SIP’s? Or can you just use a 4 in. foam panel with 2×2 sleepers underneath for a vent channel.And how would you shingle that? I have a budget(like every other person in the country rite know) so I need some creative solutions that will meet local codes. Help is appreciated, thanks ,Bco
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you can get "vented" sip (sorta) panels that lay on top of an existing structure, are "asphalt shingle friendly"... which in and of itself is a little bit confusing.. but anyhow:
check out http://www.jm.com/roofing_systems/literature/rs5167_vented_nailboard.pdf