How to Measure a Door: Trade Installers’ Guide to Fitting

November 4, 2024

For trade installers, accurate door measurements are the foundation of a successful installation. Whether you’re fitting one of Dekko’s premium uPVC doors, sophisticated Räum entrance doors, or high-performance composite doors, precise measurements are crucial for achieving that perfect fit.

This comprehensive guide will walk you through the essential steps of measuring a door, helping you deliver professional results every time.

Understanding the Basics of How to Measure a Door

When measuring for a new door or replacement door, you’ll need to consider three crucial dimensions:

• Width of the door
• Height of the door
• Thickness of the door

These measurements form the foundation of your installation project, whether you’re fitting external door systems or internal bifold doors.

Step-by-Step Measurement Guide

Measuring Door Width

• Measure the existing frame at three points: top, middle, and bottom
• Record the widest measurement
• For replacement doors, measure the door leaf itself
• Don’t forget to account for door jamb clearance

Measuring Door Height

• Take measurements from the top corner to bottom corner on both sides
• Record the longest length
• Ensure measurements account for floor covering
• Consider threshold requirements for exterior doors

Frame Depth Measurements

• Measure the thickness of the door
• Check vertical sides of the frame
• Account for any architectural details

Why Do Some Doors Fail to Fit Properly?

The most common reason for poor door fitting is inadequate measurement technique. Taking multiple measurements of the width and height of the door frame, rather than relying on a single measurement, helps ensure accuracy and accounts for any irregularities in the opening.

Best Practices for Professional Installers

• Measure each dimension a couple of times
• Document all measurements clearly
• Verify rough opening dimensions
• Fire doors need precise clearances
• Pocket door systems require additional measurements
• Handle height specifications must meet regulations

Dekko’s Door Solutions

At Dekko, we understand the importance of precise measurements in achieving the perfect fit. Our comprehensive door range includes:

• Premium uPVC Doors: Engineered for precision, our uPVC doors offer excellent thermal performance and security features.
• Infinity Composite Doors: These doors combine style with durability, offering superior weather resistance and security.
• Solidor Composite Doors: Premium composite doors featuring advanced security features and customisable designs.
• Räum Entrance Doors: Contemporary aluminium entrance doors offering exceptional performance and aesthetics.

Advanced Measurement Considerations

Different door types require specific measurement approaches:

Standard Internal Doors

• Check standard door sizes
• Measure existing frame
• Account for architraves

External Doors

• Consider weather sealing
• Account for threshold requirements
• Check building regulations compliance

Bifold Doors

• Measure track requirements
• Check opening configurations
• Consider stacking requirements

Professional Installation Support

At Dekko, we understand that accurate measurements are just the beginning. Our technical team is available to support trade installers with:

• Detailed product specifications
• Installation guidance
• Technical consultations
• Custom solutions for non-standard situations

Getting the right measurements is crucial for a successful door installation. As a leading UK manufacturer of premium doors, Dekko is committed to supporting trade installers with superior products and technical expertise. Contact our team today to discuss your next project or request detailed product specifications.

Remember, precise measurements lead to perfect installations, and with Dekko’s support, you can ensure every project meets the highest professional standards. Let us help you deliver excellence in every installation.

More From Dekko

Why condensation on the outside of windows is a sign of high performance glazing

The installer’s guide to Solidor composite doors

A complete guide on how to install sliding external doors