Spray foam and drainage space at sill pan cavity
The gap of the sloped sill pan and window was spray foamed to the back of window flange.
I’ve removed foam from some windows. Is it worth removing SPF from other windows and re-spraying with less foam.. or use backer rod/sealant for interior seal?
Or should I leave the rest like they are and have the blocked drainage gap.
I’m wondering if it is more important to insulate under window frame to improve performance of the outie windows.
I called the window company and they said insulation of this space is more important then drainage potential. Reason being, if you allow air into this drainage space, it could find a way into the window casing (if there was a crack) and leak into the window and possibly living space?
I apologize for asking too many questions in my last post. It does not promote clarity and no one wants to read a novel, I should know better 😉 Won’t happen again!
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