Standard window gap allowed for window size

Jimmy · **Joined:** Tue Nov 10, 2009 9:11 am **Posts:** 8

I have customer window install and one of the windows is about one inch smaller than the existing window. Is this normal? Shall I have them to remake the window exact size? What's the standard gap allowed? Thanks! By Jimmy

Windows on Washington · **Posted:** Tue Nov 10, 2009 9:37 am

1/8th inch on all sides.

prosteelheader · **Joined:** Wed Jan 20, 2010 6:38 pm **Posts:** 25

ive been with the same window company for the last 17 years. we've always used the 1/4 inch difference method. frame measures 1/4 inch less than the rough opening, on all sides. in my opinion, 1/8 inch doesnt allow for much manuvering or very tight applications.

Windows on Washington · **Posted:** Mon Jan 25, 2010 9:52 am

prosteelheader wrote:

ive been with the same window company for the last 17 years. we've always used the 1/4 inch difference method. frame measures 1/4 inch less than the rough opening, on all sides. in my opinion, 1/8 inch doesnt allow for much manuvering or very tight applications.

Depends how racked the opening is, however, we deduct one 1/4" from the width and the height of the RO. That is where I get the 1/8 on all 4 sides.

Standard window gap allowed for window size

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