Comments on: Joe Lstiburek’s Ideal Double-Stud Wall Design
https://www.energyvanguard.com/blog/joe-lstiburek-s-ideal-double-stud-wall-design/
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By: Thomas A. Peterson
https://www.energyvanguard.com/blog/joe-lstiburek-s-ideal-double-stud-wall-design/#comment-8316
Tue, 05 May 2015 20:37:46 +0000http://energyvanguard.flywheelsites.com/?blog_post=joe-lstibureks-ideal-double-stud-wall-design#comment-8316David,
David,
Your questioning the construction sequence for the outer wall, is why I recommend a slightly different procedure. 1. Frame from foundation to roof. 2. Install exterior sheathing & DP 3. Exterior siding = weather tight shell. 4. Install insulation in exterior framed wall. 5. Continuous insulation board attached to interior of studs. 6. 6 mil vapor retarder next attached to floor decking and cap vapor retarder (bit more difficult on multistory). Significantly reduces air infiltration between and under all plates & studs. 7. Next build second lightly framed curtain wall (studs offset)to hold all electrical & any plumbing inside of continuous vapor retarder with more insulation then sheetrock+.
This system allows for easier framer understanding (no insulation blowing in the wind) and much easier quality control.
Like Dr. Joe’s there is much more to this system.
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By: Thomas A. Peterson
https://www.energyvanguard.com/blog/joe-lstiburek-s-ideal-double-stud-wall-design/#comment-8317
Tue, 05 May 2015 16:37:46 +0000http://energyvanguard.flywheelsites.com/?blog_post=joe-lstibureks-ideal-double-stud-wall-design#comment-8317David, <br /> David, <br /> <br />Your questioning the construction sequence for the outer wall, is why I recommend a slightly different procedure. <br />1. Frame from foundation to roof. <br />2. Install exterior sheathing & DP <br />3. Exterior siding = weather tight shell. <br />4. Install insulation in exterior framed wall. <br />5. Continuous insulation board attached to interior of studs. <br />6. 6 mil vapor retarder next attached to floor decking and cap vapor retarder (bit more difficult on multistory). Significantly reduces air infiltration between and under all plates & studs. <br />7. Next build second lightly framed curtain wall (studs offset)to hold all electrical & any plumbing inside of continuous vapor retarder with more insulation then sheetrock+. <br /> <br />This system allows for easier framer understanding (no insulation blowing in the wind) and much easier quality control. <br /> <br />Like Dr. Joe’s there is much more to this system.
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By: Foster
https://www.energyvanguard.com/blog/joe-lstiburek-s-ideal-double-stud-wall-design/#comment-8314
Fri, 01 May 2015 00:08:13 +0000http://energyvanguard.flywheelsites.com/?blog_post=joe-lstibureks-ideal-double-stud-wall-design#comment-8314What’s the construction What’s the construction sequence for the outer wall?
1. Frame from foundation to roof. 2. Install insulation 3. Hope it doesn’t get windy or rainy. 4. Install exterior sheathing & WPABL. 5. Install exterior finish.
Is that it?
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By: Foster
https://www.energyvanguard.com/blog/joe-lstiburek-s-ideal-double-stud-wall-design/#comment-8315
Thu, 30 Apr 2015 20:08:13 +0000http://energyvanguard.flywheelsites.com/?blog_post=joe-lstibureks-ideal-double-stud-wall-design#comment-8315What’s the construction What’s the construction sequence for the outer wall? <br /> <br />1. Frame from foundation to roof. <br />2. Install insulation <br />3. Hope it doesn’t get windy or rainy. <br />4. Install exterior sheathing & WPABL. <br />5. Install exterior finish. <br /> <br />Is that it?
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By: David Butler
https://www.energyvanguard.com/blog/joe-lstiburek-s-ideal-double-stud-wall-design/#comment-8312
Thu, 30 Apr 2015 13:52:32 +0000http://energyvanguard.flywheelsites.com/?blog_post=joe-lstibureks-ideal-double-stud-wall-design#comment-8312Seems to be some confusion in Seems to be some confusion in the comments (and responses by AB).
First, I think Thomas D’s link did a good job explaining the not-often used term double-wall as a non-insulated wall where outer sheathing also serves as the inside wall — thus ‘single wall’.
OTOH, by that definition, a double wall is what we think of as conventional stud wall — with sheathing on outside and drywall (or whatever) on the inside, thus two surfaces or double wall.
That said, methinks building science terminology is confusing enough without imposing such a limited regional slant on everyone else.
As for Edgar’s question, I believe he’s asking why the insulation doesn’t fall in the gap between the two walls. If so, then the correct answer is that the insulation is supposed to fill the in-between gap (see 2nd diagram).
Finally, after reading the previously referenced article, I saw nothing to lead me to think Joe endorsed that wall. And after the postscript you added relating Joe’s phone call, no one else would have, either.
If Joe gave you a hard time for not spelling out a disclaimer on his behalf in your article, you should have told him to chill. I thought you did a fine job “reporting” on Kohta’s report.
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By: David Butler
https://www.energyvanguard.com/blog/joe-lstiburek-s-ideal-double-stud-wall-design/#comment-8313
Thu, 30 Apr 2015 09:52:32 +0000http://energyvanguard.flywheelsites.com/?blog_post=joe-lstibureks-ideal-double-stud-wall-design#comment-8313Seems to be some confusion in Seems to be some confusion in the comments (and responses by AB). <br /> <br />First, I think Thomas D’s link did a good job explaining the not-often used term double-wall as a non-insulated wall where outer sheathing also serves as the inside wall — thus ‘single wall’. <br /> <br />OTOH, by that definition, a double wall is what we think of as conventional stud wall — with sheathing on outside and drywall (or whatever) on the inside, thus two surfaces or double wall. <br /> <br />That said, methinks building science terminology is confusing enough without imposing such a limited regional slant on everyone else. <br /> <br /> <br />As for Edgar’s question, I believe he’s asking why the insulation doesn’t fall in the gap between the two walls. If so, then the correct answer is that the insulation is supposed to fill the in-between gap (see 2nd diagram). <br /> <br />Finally, after reading the previously referenced article, I saw nothing to lead me to think Joe endorsed that wall. And after the postscript you added relating Joe’s phone call, no one else would have, either. <br /> <br />If Joe gave you a hard time for not spelling out a disclaimer on his behalf in your article, you should have told him to chill. I thought you did a fine job "reporting" on Kohta’s report.
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By: Tim Lacey
https://www.energyvanguard.com/blog/joe-lstiburek-s-ideal-double-stud-wall-design/#comment-8310
Thu, 30 Apr 2015 03:30:36 +0000http://energyvanguard.flywheelsites.com/?blog_post=joe-lstibureks-ideal-double-stud-wall-design#comment-8310No mention that the moisture No mention that the moisture meters may have been installed incorrectly and gave false readings. Just saying.
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By: Tim Lacey
https://www.energyvanguard.com/blog/joe-lstiburek-s-ideal-double-stud-wall-design/#comment-8311
Wed, 29 Apr 2015 23:30:36 +0000http://energyvanguard.flywheelsites.com/?blog_post=joe-lstibureks-ideal-double-stud-wall-design#comment-8311No mention that the moisture No mention that the moisture meters may have been installed incorrectly and gave false readings. Just saying.
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By: Allison Bailes
https://www.energyvanguard.com/blog/joe-lstiburek-s-ideal-double-stud-wall-design/#comment-8308
Wed, 29 Apr 2015 23:28:04 +0000http://energyvanguard.flywheelsites.com/?blog_post=joe-lstibureks-ideal-double-stud-wall-design#comment-8308Mac S.: Mac S.: Thank you, sir! I have to make it simple enough so I can understand it. Here’s a direct link to the Galena page at the Cold Climate Housing Research Center:
Edgar: Unfortunately the BSC diagrams don’t show the bottom of the wall details, but there would need to be OSB or plywood at the bottom, connecting the outer double-stud section to the bottom of the structural wall, maybe using a ledger.
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By: Edgar
https://www.energyvanguard.com/blog/joe-lstiburek-s-ideal-double-stud-wall-design/#comment-8306
Wed, 29 Apr 2015 22:13:06 +0000http://energyvanguard.flywheelsites.com/?blog_post=joe-lstibureks-ideal-double-stud-wall-design#comment-8306Allison, what is holding the Allison, what is holding the interior wall insulation from falling into the 4.5 inch air space?
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