Ok, shorter question: does it make sense to lop off the eaves to achieve
an airtight seal with exterior rigid foam if I can't do the rest of the
wall assembly right away? All the rest below is detail....
Hi, I'm tackling the whole house planning and trying to figure out what sequence I can do it in. So far, roof first. Roof will have insulation on top of the deck and we'll dense pack to help air seal (the entire house is almost all cathedral ceilings).
While we have the roof off, we have to seal the top of the walls. The roof slope is 4:12 with a 3' overhang, 2"x10" rafters extending to that distance, which is a lot of eave/soffit area with no room to work near the top of the wall from inside. Our current thinking is to take out a strip of plywood from the roof and do all the sealing work from above. That, of course, leaves me with tricky timing with my roofers and the roof open to the elements while we do it.
I was curious about doing a chainsaw retrofit, doing work, and then bolting an eave back on. Does this make any practical sense at all? I'm thinking this might allow me to wrap the continuous membrane from the roof directly onto the side of the house, give me access to seal the walls, and allow me to do this work prior to ripping off the rest of the roof and coordinating dense pack install + roof install. Those reasons obviously are operational vs. financial.
I know rebuliding the eaves will not be free, but I was hoping someone could give me an idea of what we might be spending vs. the benefit. I thought a)we could
DIY a good part of this and b)we wouldn't be as dependent on scheduling with the
roofers and insulation installers for the critical wall/roof air sealing part.
I can't afford to do the walls the way I'd like at this time (rigid foam on exterior with new siding). If I go this route, should I go ahead and put some tiny bit of rigid foam on the wall on the outside of the house? Of course, the rigid foam on the outside would only be ~ a foot before it hit siding, but I was curious if there was any merit in consider so that once I figure out what we're doing with the siding (cedar right now), it's already started? I was hoping it might a offer a skosh more air sealing support since it's outboard of the wall?
FYI, Price quote for dense pack in the walls was around $5000, but the biggest problem is either the siding is destroyed (cedar; we have been assured it would look funky) or the inside of the house is a wreck. If only air sealing were free.....
Thanks so much.
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