Getting R49 with Exposed Beams & Vaulted Ceiling (Pictures)
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I’ve got a late 60’s house with nice beamed/vaulted ceilings. Doing full remodel and going to need to pass energy audit. What are the approaches to getting high R value without destroying the look? It does need a new roof (condition of decking TBD) and the budget is good. Just trying to scope the whole remodel and I am no insulation expert.
Thanks!
JD
Replies
SIP Panels. Very Expensive process though.
Yeah- and completely redoing the fascia- looks like 14" needed- the void in there is only about 11" tall. Thanks
Outsulation- rigid foam boards sized to the R value you need placed over the outside of the roof deck and then covered with plywood or OSB and really long screws to anchor them.
Yeah, similarly looks like I need 13-14" for Outsulation. Thanks.
Any spray foam solution? Spray foam can get R-7 per inch which fits the existing space but I've never seen it used on a roof- just walls. Any reason you couldn't use it here?
With rigid polyiso board is also a 6.5 to 7 R value per inch thickness at less cost than sprayed closed cell foam. You could do 3 - 2 inch layers of board product with seams offset and taped and the layers screwed to the deck. You should also do exterior foam board insulation.
Check out some of the builds on The Build Show. If you are really curious check out the videos put together by Matt Risinger in Austin, Texas He has some videos on YouTube that have all the details on some of the roofs he has built. It is eye opening and doable. Part of the process is redoing your overhangs. The top of the wall and the edge of the roof are sealed and insulated together. The overhang is added later. Look at some of the Risinger videos and you can see how it is done.
Cool- I will def check out polyiso and that show.
On the overhangs- Are you assuming everything above the exposed beams gets replaced? I'm trying to work with existing rafters & ceiling. There is asbestos in the joint mud so taking down the rafters & drywall is a VERY expensive proposition. Thanks.
Looks like closed cell spray foam may be a good option too- got a price of $13 per SF for R60. Not cheap but the rafters, ceiling and fascia can stay in place. 6.5 R/Inch so it fits. Not sure what the roof assembly would then rate R-wise but seems good enough to not be a burden on the overall energy model output.
Thanks for help everyone!