Thinking of upgrading your front door? Whether you’re looking for better insulation, improved security, or a fresh new look, getting the size right is the first step. Here’s a simple guide to help you measure your door accurately for quoting purposes.

As always, we’ll carry out a professional survey before installation – but having some rough measurements upfront can help speed up the process.

What You’ll Need

• Metal tape measure (for best accuracy)
• Pen and paper or phone to note your measurements
• A step stool (if needed)
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Step-by-Step Measuring Guide

1. Measure the Width

• Measure the width of the door in three places: top, middle, and bottom.
• Measure from the inside edge of one side of the frame (jamb) to the inside edge of the opposite side.
• Use the smallest of the three measurements as your final width.
• Pro tip: Don’t include trim or architrave – just the frame opening.

2. Measure the Height

• Measure from the sill (or threshold) at the bottom to the underside of the head (top of the frame).
• Take three measurements: left, centre, and right.
• Use the smallest number for your final height.
• Note: If your door opens onto a step or external porch, ignore that and measure just the door frame opening.

3. Measure the Thickness (Optional)

• If possible, note the thickness of your current door.
• Standard doors are often 44mm thick.
• Composite doors can range between 44–70mm.

4. Note the Hinge Side and Swing Direction

• Stand outside your home facing the door and check:
• Are the hinges on the left or right?
• Does the door open inwards or outwards?
• Example: “Right-hand hinged, opens inwards”

5. Take a Photo (Optional but Helpful)

• A quick photo of the inside and outside of the door helps us understand your setup – especially if you have side panels, unusual frames, or a letterbox.