How to Measure for Your New Roller Garage Door

Are you considering upgrading to a new roller garage door? One of the first steps is getting the right measurements to secure an accurate quote. We know this can seem daunting, but don’t worry, our Garolla experts have streamlined the process to make it as simple as possible.

You’ll only need to take a few basic measurements to get an estimate using our online door builder. From there, professional engineers will handle everything else, ensuring precision and peace of mind.

Fixing Types: Reveal vs Face Fixing

First things first, let’s talk about fixing types. This refers to where the top box and guides for your roller garage door will be installed: either within the reveal of your garage opening or behind the face wall of the garage.

Reveal Fixing

This option involves fitting the top box and guides within the structural opening of your garage. You will see the full door from the outside, however this fitting choice is perfect - or indeed the only option - for those with limited headroom on the inside of their garage which won't accommodate a top box.

Considering that it lowers the entrance height, we would advise choosing a face fit if your garage already has restricted clearance at the entrance but ample headroom height inside.

Reveal fitting a garage door can often be cheaper than face fitting as you'll require slightly shorter slats.

Face Fixing

Face fixing your new electric roller garage door involves installing it on the inside of your garage. Your top box and guides are attached to the internal brickwork, which means from the outside all you will see are the slats of your garage door.

Over 75% of Garolla garage doors are fitted in this way as it maximises the access space into your garage - something that could be particularly important if you park your car in your garage. Face fixing might be the better option if your garage has limited headroom or width.

Head Height Room for the Top Box

Head height requirements are critical in determining the best fixing type for your new roller garage door. The top box houses the rolling mechanism and needs adequate space for smooth operation. 

If your garage has a low ceiling or limited headroom, face-fixing the top box inside the garage is often the optimal solution. Check out the detailed headroom specifications required for each Garolla garage door model to make an informed decision.

Measuring the Structural Opening

Now, let’s get down to the nuts and bolts: measuring your garage’s structural opening. Here’s a step-by-step guide:


Measure the distance between the two side walls of your garage at the widest point. Take measurements at multiple heights to ensure accuracy and use the smallest measurement as your final width.


Measure the distance from the floor to the lowest point of the ceiling or lintel. Again, measure at multiple points and use the smallest height.


Measure the distance from the top of the opening to the ceiling or any obstruction. This will help determine the fixing type and whether your garage can accommodate the top box.

Once you have these measurements, enter them into our online door builder to get an instant estimate. This tool is designed to give you a quick and convenient way to explore your options and see what fits your budget.

Guaranteed Precision

Feeling overwhelmed? No problem. Here at Garolla, we pride ourselves on making the process as easy and stress-free as possible. That’s why we offer a free, no-obligation survey with one of our expert local engineers. 

During this visit, our engineer will take precise measurements, assess your garage and walk you through all available options to ensure you get the perfect roller garage door for your home.

Your Local Garolla Engineer

With our nationwide network of engineers, you can be confident that a professional is never far away. Our engineers not only conduct the initial survey but also handle the installation, ensuring a seamless and efficient process from start to finish. Trusted by over 100,000 homeowners, Garolla is your go-to provider for quality roller garage doors.

Ready to get started? Visit our website to use the online door builder or book your free survey today.