Marvin essential casement installation, drip cap and BMC

3 years ago

last modified: 3 years ago

I have some casement windows to install and have some questions related to the essential brick moulding and installation with dripcap flashing

the instructions for the brick moulding BMC show no fashing over the head trim and the gap caulked. i think it would better to add a rigid drip cap extending under the house wrap and over the head trim. The gap not caulked. would this be a better way and worth the time? The BMC is fiberglass and would not be effected by water but i thought it would be better.

The window has a build on pvc drip cap flashing. Should i remove it and add a rigid cap? Would the thickness of the trim coil effect the BMC installation if i add it?

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Comments (3)

Seabornman
3 years ago
That built-in flashing is your nailing fin so I wouldn't remove. I agree, flash over the brick mold. I don't see what benefit caulking from window to brick mold gives you. You are using self-stick tape flashing over the nailing fin, right?
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Harold Buckner
Original Author
3 years ago
Yes I’m using the butyl tape to flash the sill and the nailing fin. They did not say to caulk the window to brick mould just the brick mold on all four sides to siding which i agree with the three sides put the top i wante to add the flashing and not caulk it
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Seabornman
3 years ago
Yes, no caulk at flashing over trim at head.
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