Any advice for installing skylights in an unvented cathedral ceiling, other than don't do it?
Hi I'm getting set to install 2 velux skylights in the roof of my addition. Its a shed roof style addition that I built using 2x 12 rafters that will be dense packed with cellulose and on top of that I have a SIP of 2 layers of 5/8 advantec sheathing and 2 layers of 1.5" blue foam.
I'm concerned about condensation issues and this will be my first attempt at installing skylights so any advice in general beyond the manufactures instructions will be appreciated. I live in climate zone 5 and yes I am now aware that 3" of foam is not the recommended amount, but I was unaware of this before the roof went on. Would I be wise to add interior storm windows over the skylights for the winter months or would an airtight window box be a terrible idea?
Also since the roof is unvented but I have eves that overhang 2' should I put vents in the eves with no way to vent the air up and out, or should I just box them up tight? Thanks -Chris
Posted Sat, 08/17/2013 - 13:12
Edited Mon, 08/19/2013 - 09:50
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