Stainless steel flashing for exterior basement insulation
I'm looking to insulation a basement on the exterior with 4.5" EPS. This is a retrofit application. It's in Halifax, NS, Canada (zone 6 I believe).
I'm looking at stainless steel L flashing with drip edge. Stainless for durability and appearance as the house is about 1000ft from the sea and we get a fair amount of rain even in the winter. We also get a fair amount of snow too. :)
(1) What is the minimum gauge of stainless steel you guys would recommend? The 2010 Canadian building code requires a minimum of .33mm (13 thou) for galvanized steel for flashing. That's thin for galvanized. It doesn't say anything about stainless. One good link from SSINA (http://ssina.com/download_a_file/roofing.pdf) says you can use a thinner gauge stainless than galvanized.
(2) How do you join the flashing end to end? Does each piece have to be mechanically fastened to each other or can I use sealant to seal the seams between pieces. How do you account for expansion in the joining?
(3) What is a good method of adhering the flashing to concrete. We don't have termites in Nova Scotia but there are carpenter ants. I'd like to use it as a bug guard as well by attaching it to the top of the concrete wall. Again this is retrofit so I can't insert it under mud-sill.
Posted Thu, 03/27/2014 - 14:28
Edited Thu, 03/27/2014 - 19:45
Other Questions in Green products and materials