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vegas0105

05:53PM | 09/11/04
Member Since: 09/10/04
1 lifetime posts
Bvhvac
Hello, My ceiling rafters for the vaulted ceiling are 2x6's how much insulation can I put in?

sbreger

03:57PM | 11/08/04
Member Since: 11/07/04
1 lifetime posts
R-19 Insulation sold in rolls or batts are design to fit into available space.

Use R-19 with kraft paper face (paper to inside of room) Because insulation is right up to roof sheething, don't forget to add rafter venting.

rough estimate is :

R11-R13 is for a 2 by 4

R19 is for a 2 by 6

R25 is for a 2 by 8

R30 is for a 2 by 10

If you Stuff R25 designed for a 2 by 8 into the space of a 2 by 6 you will effectively reduce your R25 into R19.

Look at the package on the insulation it will tell you what it was designed to fit in.
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