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Hi:
I have a remote cabin in Ontario. It is heated 6 to 7 times each winter for 2-3 days.
Pitch varies from 3:12 to 12:12. Shortest length of panel is 16'.
The existing roof is mineral face roll roofing over 30# felt over 2" rough sawn decking on log timbers.
I plan to place 2'x8'x2" rigid foam between 2" x2" stringers nailed parallel to the ridge line with metal panels perpendicular on top of that. I plan to face the eaves and gable ends with 2" x 4" strips. This leaves a flat surface bounded by 2" lumber with 24" OC stringers for fastening.
My questions:
1. Sound OK?
2. OK to leave the existing roll roofing in place?
3. Could I go to 48" OC stringers and increased space between fasteners?
Thanks for any help you can offer
Or copy this URL:
https://www.metalroofing.com/spirit/comment/11675/find/
There is no insulation at all on the roof at this time. The plan is to have this sequence from the interior out: 2" rough sawn planking, existing 30# felt, existing mineral face roll roofing, 2" pink foam, metal roof panels.
Or copy this URL:
https://www.metalroofing.com/spirit/comment/11677/find/
Do you want the 3:12 sections to be "walkable?" Does it make any sense at all to run the 2x2s perpendicular to the ridge to facilitate ventilation? I just insulated a 2:12 roof with 3 1/2" rigid foam w/2x4s on edge @ 16o.c.. However, if you are only heating it a handful of times... your plan with 2" foam should yield R13?
6/30/2008
Isaiah Industries, Inc.
7/13/2008
7/15/2008
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7/17/2008