It is essential to measure both sides as the frame may not be completely level therefore the door may have to be taller on one side than the other to ensure a proper fit with no gaps.
How to measure a door frame for replacement.
Learn how to properly measure.
Measure the door frame measuring the frame of a door is similar to measuring the door itself.
Carefully measure from the top of the door to the center of the lockset keeping the measuring tape flat.
800mm divided by 2 gives 400mm minus 4mm equals 396mm.
Internal width divided by 2 less 4mm e g.
Just to be safe measure the area where your door will go too.
Wooden and timber doors.
Across the top middle and bottom sections.
The chart below includes hardware locations for the most popular manufacturers of hollow metal doors and the most common door heights.
Measure the height and width of the framed door space.
You are going to measure the hole within which the door was just sitting.
When replacing a hollow metal door on an existing steel door frame precise measurements are needed to ensure that the new door will fit properly.
Record the backset distance the length from the door edge to the center of the lockset.
This will help ensure that you select the exact right replacement door.
We recommend taking three measurements in the width top middle and bottom and two measurements in the height left and right.
Successful installation of a replacement entry door starts with accurate measurement of the door opening and accompanying trim.
Always go with the larger measurement.
Measuring for a new front door.
Use the smallest figure as your measurement.
To measure the height run the tape measure up the inside of the door frame from top to bottom and then take 3 measurements of the width.
Open your existing door towards you.
Measure the width of the door in 3 locations.
Double doors fitted in a frame each door needs to be 4mm less than the internal width to allow for the hing action door panel should be approx 5mm less than the height.