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Is anyone living in a passive solar home? Or is an architect?
Blanka:
No matter what you plan to do, invest at least in the latest insulation. 5W/m2K is possible in 8cm today, for example with Kingspan Kooltherm. Ridiculous high isolation, much thinner than old fashioned rockwool or fiber-glass cloth.
spystyle:
--- Quote from: Blanka on January 23, 2010, 12:17:32 pm ---No matter what you plan to do, invest at least in the latest insulation. 5W/m2K is possible in 8cm today, for example with Kingspan Kooltherm. Ridiculous high isolation, much thinner than old fashioned rockwool or fiber-glass cloth.
--- End quote ---
Thanks for your input Blanka :)
I am not very concerned about wall thickness - unless you think I should be.
What do you think the least expensive way to reach an R-value of 80 or 100 is?
I wonder how much it would cost in Kingspan Kooltherm to make a small A-frame house super insulated?
I hear good things about that spray in cellulose used in the deep energy retro fits :
Thanks,
Craig
SavannahLion:
The A-frane I grew up in was spec'ed for 8" thick walls. Plenty of space to pack in insulation, especially with modern insulation materials.
Technically a well designed solar home should never require any sort of additional heat, but if don't get any sun, you might as well live in an icebox. Plan on installing a supplemental heat source at least.
drventure:
That one pic above doesn't look like spray in cellulose. Looks more like expanding polysterene foam, which is good stuff, but god awful messy to install, and it sticks like heck to EVERYTHING!
ideft:
The spray foam is a good insulator and is air tight, but is crappy at insulating sound because of the density of it. Just something to consider if you live by a noisy road and don't want to hear every car drive by. In one house that I worked on they did the whole house like that and the expanding of the foam kicked the window frames, and therefore twisted alot of the windows out of level. It even put so much pressure on the windows that some of them cracked. Also it costs more then regular insulation. One way I have seen it done around here is to have a higher R value on the inside and then put 2" pink board on the exterior walls to give it some more R value.
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