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Home » Customer Support » How to Measure for a Loft Ladder
EnviroFold Timber Folding Loft Ladder

The SureFIT Measuring Guide for a Loft Ladder

Many people choose to install a loft ladder to make it easier to access their loft space. Loft ladders can provide convenient and safe access to your attic and can be installed relatively easily. TB Davies makes it easy to install a loft ladder correctly using our SureFIT guide and ensures you buy the right size. All you have to do is follow our easy, step-by-step guide below.

Before measuring up, get a quality tape-measure, e.g., Stanley or other named brand. A 5m tape-measure will be plenty long enough, and will enable you to measure the floor-to-ceiling height accurately.

For a SureFIT step-by-step guide of what you need to measure to ensure you buy the correct size, keep scrolling down.

1. Measure the Loft Opening

Measure the opening in your ceiling where you’ll be installing the loft ladder. You’ll need to know the length and width of the opening and the floor-to-ceiling height so that you can purchase a ladder that fits correctly. For example, our loft ladder range fits floor-to-ceiling heights up to 2.8m.

Ensure that you measure the narrowest point in the loft opening to ensure that the loft frame fits.

You’ll need to check that your loft opening is level and square, i.e., with 90 right angle corners, making it suitable for our loft ladder. All you need to do is measure the opening diagonally from corner to corner on both sides. Then, compare the two measurements. They should be the same.

2. Complete & Submit Form

Complete the form below and enter your measurements. Send this, remembering to attach an image, if necessary, and we’ll work out what fits.

Depending on the size of your loft opening, you may require spacer blocks to ensure a tight fit. Ensure that you have these to-hand when you come to fit your Loft Ladder.

3. We’ll Tell You What to Buy

We’ll get back to you in 2-working days with details of the right loft ladder you should buy to fit your loft space. We’ll also tell you the closest stockist to your home/office, to save you looking.

Use this diagram to work out what you’ll need to measure

The above measurements are required to correctly work out the right size loft ladder to install

Measure each of the following dimensions

Dimension to MeasureMaximum Dimensions
A- Floor-to-ceiling heightHeights up to 2.8m
B-Minimum landing space requiredAt least 550mm clearance
C-Minimum swing clearance requiredAt least 550mm clearance
D-Vertical clearance requiredAt least 400mm clearance
Loft opening, length x widthOur loft openings are from 1200 x 550 up to 1200 x 700mm

Now complete the form with your measurements and include a picture of loft space

Please enable JavaScript in your browser to complete this form.

Customer Details

Name *
Address *

SureFIT Loft Ladder Dimensions

The following dimensions are all: *
Drag & Drop Files, Choose Files to Upload You can upload up to 3 files.
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After submitting the form, we’ll be in contact with the loft ladder we thinks best fits

To see what the loft ladder looks like to install, watch our Installation Video below.

Video Installation

This handy video guide will walk you through the steps in fitting your TB Davies Loft Ladder.

Please note, video shows how to install a loft ladder, in this case a TB Davies EnviroFold is being installed, however many of the steps are common across the TB Davies range of Loft Ladders. Features may vary from model you will purchase.

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Copyright © 2026 TB Davies (Cardiff) Ltd, Lewis Road, Cardiff, CF24 5EB. +44(0)29 2132 0000. Registered in England No. 00534073, VAT Reg No. GB134144207. TB Davies (Dublin) Ltd, 9 Exchange Place, Dublin 1, Ireland. Investors in People Silver Award Since 2018. An ISO 9001 Registered Company. Members of the Ladder Association and PASMA. Ladders-Online.

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