Picture window install


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Old 03-04-18, 02:55 PM
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Exclamation Picture window install

Replacing two sistered double hung windows with one picture window.

The house has a brick facade, but we will be using a new construction window with nailing fins. I'll pull whatever bricks I need to.

My first question is about size. I measured the framed opening in three vertical and two horizontal locations and have the opening dimensions. It's out of square so obviously, I'll work off of the smallest horizontal and vertical dimensions. The dealer wants the window size and not the opening size. My question is: what kind of gap do I allow for around the perimeter? I've heard 1/4" on each of all four sides. Is that correct?

Thanks guys!
 
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Old 03-04-18, 03:45 PM
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For a new construction style window that has a nailing fin, the window should be a total of 3/4" to 1"smaller than the rough opening. That would be at 3/8-1/2" per side.
 
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Old 03-04-18, 04:47 PM
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Wow. It takes that much space to shim or why?
 
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Old 03-04-18, 05:12 PM
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Yes, shims and insulation. It's hard to properly insulate a tight space. And the fat end of a shim is 3/8".
 
 

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