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Old 01-18-2012, 07:04 PM   #1
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What is proper amount to take off for retro fit windows?


I am replacing windows at my home. The windows are currently the old double hung single pane wood windows from the 1950's. I want to replace with milgard alumnium windows with low e as a cost saver. There is a slope on the sill.

I have read some sites state take a 1/4" off the narrowest width and height. Others state, 1/4" off the width and 1/2" off the height.

Which is correct?

I appreciate the input.

Regards,
Jim

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Old 01-18-2012, 07:56 PM   #2
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What is proper amount to take off for retro fit windows?


Take what off of what?

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Old 01-18-2012, 08:03 PM   #3
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What is proper amount to take off for retro fit windows?


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Take what off of what?
Sorry, I wasn't clear.

I meant to take off the original measured rough opening for a new window.

For example, if my window height measures 54" would I order a new window with a height of 53 1/2" or 53 3/4"?

I am not sure if the width and height of the new window should be 1/4" or a 1/2" less than the rough opening measurement?

Thanks.
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Old 01-18-2012, 08:29 PM   #4
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What is proper amount to take off for retro fit windows?


A rough opening should be 1/2" bigger both ways.
Find out what the window measures and adjust the opening accordingly.
Make sure it is plumb and square.
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Old 01-18-2012, 08:38 PM   #5
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What is proper amount to take off for retro fit windows?


Is this new constrution windows or replacement windows?
I'd never order aluminum windows, or even aluminim clad windows.
The cold or heat transfers into the house through the aluminum.
I've seen way to many times there clad windows leak behind the clading and the frames rot out.
I've replaced many an Anderson and Pella window because of this.
A vinyl window will not do that.
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Old 01-18-2012, 10:31 PM   #6
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What is proper amount to take off for retro fit windows?


+1

Totally depends on what the installation methodology is.

If the opening is relatively square and it is a pocket install, we usually do a 1/4" cut back.
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Old 01-19-2012, 07:19 AM   #7
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What is proper amount to take off for retro fit windows?


+2... It depends on the home. If the openings are very square, 1/4" is ideal. Most are not around here, so my default is 3/8 off the width, and 1/2 off the height. Typically that allows plenty of room to get the window square, add foam, and still get coverage from all of the interior stops ( without using a head expander or anything).
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Old 01-20-2012, 01:33 PM   #8
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What is proper amount to take off for retro fit windows?


Thanks everyone. I took a 1/4" off the width and the height for the new replacement window per the suggestions. My windows measured out almost all square with the exception of an 1/8" off on only a couple windows.

Since I already have one newer aluminum window, I decided to replace the one adjacent to it with the same aluminum window and the rest with vinyl.
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Old 01-20-2012, 01:54 PM   #9
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What is proper amount to take off for retro fit windows?


Both lowes and Home Depot offer free In-Home Window Installation Consultation. I believe both will measure all your windows for you, and spec out the windows and give you a quote. You might have to listen to a sales pitch, but you are not obligated to buy, and you'll have all the proper measurements you need to order your windows should you want to do them yourself.
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Old 01-20-2012, 06:22 PM   #10
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What is proper amount to take off for retro fit windows?


In the end it won't make that much difference. Do you know the rough opening measurements? If you do, just give whoever you're ordering from the measurements of the rough opening and their system will do that for you. Same if you give them the actual window measurements. I don;t think I have ever had to subtract anything.

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Old 01-20-2012, 06:29 PM   #11
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What is proper amount to take off for retro fit windows?


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Originally Posted by jimmyfloyd View Post
Both lowes and Home Depot offer free In-Home Window Installation Consultation. I believe both will measure all your windows for you, and spec out the windows and give you a quote. You might have to listen to a sales pitch, but you are not obligated to buy, and you'll have all the proper measurements you need to order your windows should you want to do them yourself.
As much as I dislike the "installed services" of those two companies, that suggestion is poor form. It may be a "free" estimate, but it still costs money to send someone to your home. What you have suggested would be no different then if you walked into HD and walked out without paying your merchandise. It is stealing. Secondly, I'm not sure how they work, but many companies only get general measurements on the initial appt, and then send someone more qualified back to get the exact measurements.
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Old 01-20-2012, 08:13 PM   #12
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What is proper amount to take off for retro fit windows?


Quote:
Originally Posted by jimmyfloyd View Post
Both lowes and Home Depot offer free In-Home Window Installation Consultation. I believe both will measure all your windows for you, and spec out the windows and give you a quote. You might have to listen to a sales pitch, but you are not obligated to buy, and you'll have all the proper measurements you need to order your windows should you want to do them yourself.
as far as home depot, the sales guy said they wouldn't give out the measurements. i asked already. makes sense they would not for a free quote.

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