Standard Size of Glass Sliding Door
Because size dictates cost. A standard 6-foot door costs around $800 to $2,000 installed. A custom 10-foot door? That’s $4,000. You are paying for the sheet of glass, not the frame. Glass is the expensive stuff.
Also, size matters for your dog. If the clear opening is 34 inches, your Great Dane might not fit. You’ll need a bigger door. That’s how pet owners justify splurging on custom sizes. “But Fluffy needs to feel the breeze.”
The “Patio Door” Comedy of Errors
People measure their sliding doors wrong all the time. They measure the glass instead of the rough opening. The rough opening is the hole in the wall. It is always bigger than the door. This is the number-one reason for DIY disaster.
Always measure the width at the top, middle, and bottom. They are never the same. Walls are crooked. Houses settle. It’s physics playing a prank on you.