I’m designing an in-law studio in my backyard with an unvented cathedral ceiling. In order to meet code, I’ll be filling the rafter cavities with cellulose and adding a layer of insulated sheathing above the roof decking. I’m not quite sure how to construct the roof at the eaves, where the added thickness of the insulated sheathing and extra layer of wood sheathing make the end far above the fascia and a potential stretch for the drip edge. Any ideas how to best construct this part of the roof? Thanks.
Replies
sj
clip the bottom of your rafter so the fascia isn't so tall and run it up to the roof sheeting. Then use regular or extended dripedge.
Like this? The gaps aren't pretty but I guess adding a 1x4 edge along the rake ends would hide it.
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sj
If you want a level return to the wall, then yes that would work.
If you want the overhang to follow the roof line, then cut upwards on the rafter tail parallel to the roofline and add blocking between the rafters to catch the siding or other finish material.
Seems like you'd want to cut the sheathing plumb. Either flush with the rafter tail and use a taller fascia, or flush with the finished face of the fascia.
Another option would be to rip a fillet strip to fill out the gap, but that would slightly increase rot potential if the drip edge, et al was not perfect.
But whatever, you may want to wrap the edge with rubber membrane, under the drip edge.