How is THIS High Performance, with 12-inch O.C. Framing and NO Cavity Insulation?!?!
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- čas přidán 25. 03. 2020
- How is this house high performance, if we're installing so much framing and absolutely no insulation in the wall cavities?!?! This video shows how and why we use 12" on center framing for the shear walls of the home, and insulate the entire building to the outside of the structure to prevent thermal bridging.
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Love the detail sketches!
Thank you for bringing us along! Great information 👍
Good information. Looks like we have some of the same spam bots on both of our channels. I actually watched one of their videos and they was some useful information.
Thanks, would love to see details like your fasteners for the external rockwool, your approach to outside corners, eve-to-wall and your coravent install. How's that for a punch list? Ha!
We are securing the insulation to the walls with 1x4 furring strips, aligned with every stud, and a 7" wood screw through the furring strip and into the wall framing. At the roof, we will use a 9" screw. Since all of the insulation is on the outside of the structures, we are using a triple stud at the corners. We don't need the space that a California corner allows for insulation. Check out this video about the roof/eve to wall detail. czcams.com/video/ITwTukfd-6U/video.html. Finally, we are attaching the cor-a-vent the same way we attach the 1x4 furring strips.
Smart
Great video! How will you finish the interior wall? Will you use drywall, or will the cavities be exposed?
MrsLilLady86 there will be a drywall finish on this project. We are getting drawings ready for another Off-Grid house in NC that will leave the framing exposed, and we will paint it
That's a radically new concept for me. Do you have some blower door numbers and building energy costs so we can compare it to an older structure built by common methods?
@Kenneth, the post-rough-in blower door result was 0.06 ACH50, and the house is still under construction. We will be installing exterior insulation starting next week. So, we don't have any energy consumption numbers.
@@LGSquared That's a great number. I can see it getting even better as the house progresses.
Do you find that the cost of extra exterior insulation is offset by not needing to install a vapor throttle (e.g. intello, membrane, impeccably taped and sealed drywall etc) ?
“10” inch long (wall sill plate) anchor bolts ? That is insane . You and your Structural Engineer should try drilling these yourselves. You will see how ridiculous this is!
No need, @Sue. All anchor bolts were set in place before the concrete was poured, using Simpson AnchorMate, so we can get the best of both worlds; no ridiculousness, and super strong and durable structure
When yo over design you are just spending money for no extra value. A good engineer diesnt overdesign just because he feels like it . There is an optimal design where is the most economical and durable.