Step-by-Step Guide to Measuring Internal Doors in the UK

Step-by-Step Guide to Measuring Internal Doors in the UK

Measuring internal doors accurately is crucial for ensuring a proper fit and smooth installation. Whether you’re replacing an old door or installing a new one, this guide will walk you through the process, step by step.

Step 1: Gather Your Tools

Before you begin, make sure you have the following tools:

• Tape measure
• Pencil and paper
• Spirit level
• Step ladder (if necessary)
• Measuring stick or straight edge

Step 2: Measure the Door Height

1. Remove the Old Door
   If you’re replacing an existing door, start by removing it from the frame. This gives you clear access to the frame for accurate measurements.
2. Measure the Opening
   Measure the height of the door opening from the floor to the underside of the door frame. Take measurements at three points: left, middle, and right.
3. Record the Smallest Measurement
   Write down the smallest measurement to ensure the new door will fit into the shortest part of the opening.

Step 3: Measure the Door Width

1. Measure the Width of the Opening
   Measure the width of the door opening at three points: top, middle, and bottom.
2. Record the Smallest Measurement
   Again, write down the smallest measurement to ensure the new door fits into the narrowest part of the frame.

Step 4: Measure the Door Thickness

1. Check the Door Frame
   Measure the thickness of the existing door frame or the door itself if you’re using the same frame.
2. Standard Thickness
   Internal doors typically come in standard thicknesses, usually 35mm or 40mm. Ensure your measurement aligns with these standard sizes or adjust accordingly if you need a bespoke door.

Step 5: Measure the Door Frame Depth

1. Frame Depth
   Measure the depth of the door frame to ensure the new door fits snugly within the frame. This includes the width of the rebates (the part of the frame where the door sits).
2. Account for Architrave
   If your frame has architrave (the decorative molding around the frame), make sure to include it in your measurements if it will affect the door fitting.

Step 6: Consider Door Swing and Hardware

1. Door Swing
   Determine the direction your door will swing – inwards or outwards, and to the left or right. This is crucial for ordering the correct type of door and hinges.
2. Hinge Position
   Measure and record the positions of existing hinges if you’re replacing a door. This ensures the new door can be hung with minimal adjustments.
3. Handle and Lock Position
   If you’re using existing handles and locks, measure their positions on the old door and ensure the new door can accommodate them.

Step 7: Double-Check Your Measurements

1. Re-measure
   Double-check all your measurements to ensure accuracy. Mistakes can be costly, especially if you’re ordering a custom-made door.
2. Cross-verify
   If possible, have someone else verify your measurements to avoid any errors.

Step 8: Choose Your Door

1. Standard vs. Custom
   Based on your measurements, decide if you need a standard-sized door or a custom-made one. Standard sizes are often more cost-effective and readily available.
2. Material & Style
   Select the material (wood, MDF, glass, etc.) and style (panel, flush, glazed, etc.) that suits your interior design.

Step 9: Ordering and Installation

1. Order Your Door
   Place your order with us, ensuring all your measurements and specifications are clearly communicated (if you are looking at custom doors, you can input your sizes on the product page)
2. Installation
   When your door arrives, follow the manufacturer’s instructions for installation. If you’re not confident in your DIY skills, consider hiring a professional to ensure the door is hung correctly and functions smoothly.

By following these steps, you can ensure that your new internal door fits perfectly and enhances the aesthetic and functionality of your space. Accurate measurements are the foundation of a successful door installation, so take your time and measure carefully.

Dan Maiden