How do I measure for steel and glass doors?

Measure the width of the opening at the bottom, middle and top, and the height on both sides from the finished floor to the head. Give us the wall thickness and tell us whether the floor is finished. For a sliding door, also measure the wall beside the opening that the leaf will run along and tell us what it is built from. Include a photo of the opening and we will confirm the frame dimensions with you before production. Follow the opening survey guide.