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Old 04-22-2014, 08:08 AM  
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Default convert a bow window into patio door

I am looking to convert an existing “bow “ window into a sliding patio door. The bow window is a what they call a “walk around window “ (floor to header ) with an opening
approximately 80 “ x 113 “ . Because of the size , the window ( arc) at its greatest distance protrudes about 20 inches from what would be the “inside” wall if it were a straight window.
So in a sense , if I were to use the existing opening, I would lose the square footage that the walk around portion of the window creates.

The current window is in the front of my home under a covered “raised “concrete porch. The step down to the porch is approximately 6 inches from the inside and then 96 inches to the top of the covered porch. In addition, the face of the house is brick . I want to “bump the doors out “ approximately 24-30 inches.

On the install,
I plan on using a lime stone slab (4” thick x 8” wide x length) as a base for the patio door and the side frame build out . This will be placed directly on the concrete porch in a cement “pool “ to level. I don’t want to lose any width on the window / door , so I would extend the frame approximately 6 inches on each side ( the “new length “ would then be about 125 inches) I would then come back 90 degrees and attach to the house going through the brick and into the vertical portion of the current header . Would then build a “ new header” approximately 24-30 inches out from the current one . Any exposed wood would be wrapped in window installation tape and then covered with exterior vinyl siding.
I am looking for comments, suggestions , or criticisms. Thanks in advance

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Old 04-22-2014, 09:24 AM  
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Welcome to the site. The header above the window now is to short and will have to be changed and depending on the load above may have to be engineered.

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Old 04-27-2014, 09:01 PM  
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And if you live in a freezing climate, you'll need a footing and stemwall installed under the new door's location. Not doing so will cost you big-time, and will be likely to cause you (and your heirs) all sorts of problems.

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