Inline Windows shear blocks
I am strongly considering Inline Windows for our home in Lincoln, NE (zone 5). The Inline rep informed me that the shear blocks (see attached JPG) Inline uses to mechanically secure their frames are made of PVC.
Wouldn’t this shear block introduce a potential point of failure in the window? Since the shear block is constructed from PVC, it will expand and contract at a much higher rate than the fiberglass frame. I’m thinking this could potentially lead to leaking corners as these shear blocks experience multiple heating/cooling seasons each year. Using PVC in this mechanical joint seems like it could greatly diminish the value of fiberglass frames.
I asked the Inline rep about this and an awaiting a response, but I was curious what others’ opinions are on this. Anyone have firsthand experience with these windows?