Start at the side jambs at the widest accessible portion.
How to measure rough opening for sliding patio door.
Cut away all the old silicone and paint attached to the 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.
Do this across the bottom middle and top.
How to measure for replacement sliding glass patio doors.
To measure for your sliding patio doors you will want to first step outside.
Be careful not to damage it.
Measurement b measure from the subfloor to the bottom of the header above the door.
The measurement reflects the rough opening of the existing door.
Add 2 1 2 frames generally measure 1 1 4 thick each x2.
Measure the thickest part of the jamb.
To get started you will need a tape measure a pen and your measurement guide.
Measure the jamb hump to hump.
The final sum will be your opening width.
The jamb is the outermost portion of the frame on the sides and top of a door system.
To ensure accurate measurements first remove the interior casing on the sides and top of your single or double door to reveal rough opening frame.
Depending on your style of home extend your tape measure horizontally from brick to brick siding to siding or one edge of stucco to the other edge of stucco.
Pull out any.
Remove the slider door trim with a crowbar.
Measurement a measure from inside the face of one stud to the inside of the face of the other stud.
The door width is measured at the top the center and along the bottom of the door opening.
Using a tape measure determine the width of the door from stud to stud.
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.