You ll want to measure the width of the door at the center running your tape measure from siding to siding stucco to stucco brick to brick whatever material outlines the sides of your sliding door.
How to measure a sliding door for replacement.
The height is usually 80 inches though it may vary from one manufacturer to another.
Your door actually attaches to this framing.
Run a tape measure along your door from the left corner to right corner and record this number.
Measure from stud to stud using a tape measure.
Go to your sliding glass door and take a measurement from the wall left to right of the door to the wall it is installed in.
Set the casing aside somewhere safe.
Again depending on the style of your home measure from the header to the bottom of the door sill siding to the bottom of the door sill or edge of the stucco to the bottom of the door sill.
Stud to stud refers to the 2 by 4 framing all around your slider door.
Then you will want to measure the height of the doors as well again do three measurements one from top to bottom on the left one in the middle and one on the right.
The height is determined by measuring at the top of the bottom track the center and the bottom.
Be sure to capture both width and height measurements.
If you want to measure it remove the wood trim first.
Measure the door starting at the inside of the side jamb and extend the tape measure to the center stile at the opposite end.
If it s 6 foot wide it measures up to 72 inches.
Jot dot the number as the door s height.
To measure the height of a sliding patio door extend your tape measure vertically.
Measure horizontally across the top and bottom sides of the opening starting from the studs.
Place the end of the tape at the bottom inside of the door frame and pull it up to underside of the top door frame.
Measure the width of the door.
Then place the tape measure over the top left corner extend it till the top right corner and note down the width.
Measuring stud to stud is known as the rough opening or ro measurement.
The smallest of the three measurements is the correct height.
This measurement is the width.
Remove the casing from the existing door frame to locate the studs.
Measure from the bottom of the sill to the underside of the top frame.
Do not include any other elements such as weather stripping.
Take measurements vertically on both sides.
Make sure to place it about 6 inches 15 cm from the opposite door jamb just in case the frame isn t true.