18 Feb '12, 11pm

Green Building Q&A: Best way to insulate attic that will have storage space

I live in a 1921 brick and stucco house in climate zone 5a. It has a gable roof with 2 large shed dormers (1 front, 1 rear). Attic floor joists are 2x4 with blown insulation which is spotty in areas, meaning none. Roof rafters are 2x6. There is an air handler with one large return and 3 ceiling grills (1 in each bedroom ceiling) Gable end walls are clay block with stucco on exterior. Dormer walls are framed with stucco on exterior, plaster/lathe interior and no insulation. Dormer walls on gable ends are balloon framed. I need what little attic space there is for storage. Existing max. height is 5 ft. at the peak. I was thinking of removing blown insulation and air sealing all wall plate penetrations and ceiling electrical boxes. I want to construct a rigid foam box around bath vent fan. After air sealing, I plan on insulating 2x4 joists with Kraft face fiberglass and then ...

Full article: http://www.greenbuildingadvisor.com/community/forum/gener...

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