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My question is very similar to "How can I fit a door in a frame that is too small?" except my house is made of concrete block. I bought a used patio French door to replace my sliding door. The sliding door measured 71 1/2 x 80. The French doors measured the same. After taking out the frame for the sliders, I need at least 1/2 inch on the top and sides. Help!

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Wait... Is the frame a 1/2" too large, or is the door 1/2" too large? Is it a 1/2" on each side, or 1/4" on each side for a total of 1/2"? – Tester101 Jan 26 '12 at 12:49
The opening is too small for the door and frame. 1/4" on both sides. The door is an exterior door so it is made of steel. I believe my only option is to buy new doors :( – Kim Jan 27 '12 at 0:00

It depends on the construction of the door, but if it's a wood door, you should be able to take off 1/4" from the top and bottom without any problem.

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