How to Measure a Rough Opening for Replacing French Doors

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What are some ways to replace garage doors with French doors? - Quora

The French patio door installed at my house was too small for the rough opening, so there is a gap between the concrete slab and threshold of about 1.5”. What is the

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Builders Choice 60 in. x 80 in. 15-Lite Clear Wood Pine Prehung

2- PANEL 8'0'' ROUGH OPENING HEIGHT (FRENCH STYLE) SLIDING DOOR / LOW-E 270 GLASS