https://www.energyvanguard.com/blog/advice-to-architects-draw-those-attic-kneewall-sections-right/ Building science knowledge, HVAC design, & fun Mon, 12 Jul 2021 00:13:09 +0000 hourly 1 https://wordpress.org/?v=6.6.2 https://www.energyvanguard.com/blog/advice-to-architects-draw-those-attic-kneewall-sections-right/#comment-6422 Sun, 27 Oct 2013 03:51:25 +0000 http://energyvanguard.flywheelsites.com/?blog_post=advice-to-architects-draw-those-attic-kneewall-sections-right#comment-6422 kudos to Southface Inst for
kudos to Southface Inst for the clear detail of their air sealing kneewall pdf. 
I include the link to this in each of my recommendations of homes with kneewalls. 
 
fwiw…the sheetrock to the interior of the wall provides the fire rating required to seperate foam sheathing from living space..same for foam on roofline…or so the code  
officials in my area have come to agree with. 
 
nice article Alison.

]]> https://www.energyvanguard.com/blog/advice-to-architects-draw-those-attic-kneewall-sections-right/#comment-6421 Mon, 14 Oct 2013 16:36:28 +0000 http://energyvanguard.flywheelsites.com/?blog_post=advice-to-architects-draw-those-attic-kneewall-sections-right#comment-6421 All good points, but 2
All good points, but 2 questions. Looks like they are showing flooring in the attic knee space; if continuous to outside top plate, wouldn’t that suffice in place of blocking under knee wall? And the code detail: is foam board allowed in accessible knee spaces? Doesn’t it have to be fire-rated/at least covered, as in “8”…i.e. detail could show both the foam board & fire-rated and (albeit redundant) ‘air barrier.’ All the more, move it to roofline!

]]> https://www.energyvanguard.com/blog/advice-to-architects-draw-those-attic-kneewall-sections-right/#comment-6420 Mon, 07 Oct 2013 16:14:14 +0000 http://energyvanguard.flywheelsites.com/?blog_post=advice-to-architects-draw-those-attic-kneewall-sections-right#comment-6420 HA… we provide full
HA… we provide full detailed drawings, but half of the time details are not followed. Apparently its too hard to turn pages and read a full set (too many lines). Sad but true!

]]> https://www.energyvanguard.com/blog/advice-to-architects-draw-those-attic-kneewall-sections-right/#comment-6419 Mon, 07 Oct 2013 12:21:20 +0000 http://energyvanguard.flywheelsites.com/?blog_post=advice-to-architects-draw-those-attic-kneewall-sections-right#comment-6419 Surely the diagram just shows
Surely the diagram just shows nuttiness involved in trying to achieve the air tightness layer by following the knee wall and joists. Indeed the nuttiness argues heavily in favour of moving the enclosure to the roofline and keeping the storage-useful space behind the kneewall within the heated zone.  
 
Also, one point made on a PassivHaus course I was just on in Germany is that there they do not allow timber to be part of the air-tight layer ie. you cannot tape to it. Also, silicon caulk and foam are not acceptable as they do not provide long term air tightness compared to tape. (As for what the building science guys there were saying about using PU foam in many situations, well let’s say they were less than admiring.) 
 
Maybe Georgia should be paying you for some detailing Allison…

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