Retrofitting: Z-bar or Block frame?

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Joined: Sat Oct 02, 2021 5:20 am

Retrofitting: Z-bar or Block frame?

#1 Post by Lifelonglearner »

I'm having a Milgard aluminum window installed (XOX horizontal sliders). My current window has a wood frame (casements and picture window). The house exterior is stucco.

One dealer says he'd definitely use a block frame (H-bar for slope sill); another says a Z-bar is necessary.

My priority is to protect against water damage; I'm less concerned with the cosmetic appearance of the window.

Which method of installation would you recommend, and why? Thank you!

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