What wrap or spray insulation would be recommended for use on aluminum beams that will penetrate a building?
Exploring building a cantilevered balcony using aluminum beams in order to fit the beams between existing floors. Looking for a material to prevent heat loss and condensation without corroding the beams.
Asked by L. Walker
Posted Sat, 01/28/2012 - 09:52
Posted Sat, 01/28/2012 - 09:52
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L. Walker,
Just say no to cantilevered balconies!
Good luck on solving the thermal conundrum... it's not easy...
Posted Sat, 01/28/2012 - 10:20
It may not be easy or worth the trouble...but there are "ways"
One example.....if you look at the last photos in this gallery
https://sites.google.com/site/trekhauspdx/home/building-progress/buildin...
Posted Sat, 01/28/2012 - 10:35
Martin as usual is spot-on. Cantilever penetrations of the building wall should be considered a no-no for several very good reasons - in any case aluminum would be a poor choice because of its high thermal conductivity and non-optimal structural performance.
The trekhaus balconies are a good alternative to a cantilever, but if you have no building projections to take advantage of you could have your balcony designed as a self-supporting unit using the balustrades on each side as suspension brackets. Either way you'd still have minor structural fixings through the WRB but these would be no more than for a typical deck, and easily managed.
Posted Sat, 01/28/2012 - 11:38
In the middle of repairing a cantilever deck. never flashed well, and is not easy to flash period. After 20 years the garage door headers rotted completely away under this deck.
I used angled back posts on the last deck that the owners didn't want straight down posts.
Posted Sat, 01/28/2012 - 15:32