Why Getting the Measurements Right Matters

A sign panel is made to a size, not to a feeling. Once a printed aluminium composite panel or a foamex board has been cut and finished, it cannot be trimmed on site without ruining the print, the edge seal, or both. If the panel is 40mm too wide for the fascia, you are not looking at a quick adjustment — you are looking at a reprint. That is one of the most common reasons signage projects run over budget, and it is almost always avoidable with half an hour and a steel tape.

Brighton's frontages make this harder than it sounds. Regency and Victorian buildings have settled, fascia boards have been replaced piecemeal over decades, and very few shopfronts are genuinely square. Measuring as though they were is where errors creep in.

Start With a Sketch and a Walk-Around

Before you measure anything, draw the frontage. A simple elevation sketch on a sheet of A4 — roughly to scale, with the shop window, door, pilasters and fascia marked — gives you somewhere to write numbers. Without it, measurements on a scrap of paper become meaningless an hour later.

Walk the frontage and note anything that affects the sign:

• Security shutters and their housings or guide rails
• Alarm boxes, CCTV cameras, external lights and their cables
• Awning brackets, hanging basket hooks and condensate pipes
• Soffits, returns and any stepped or recessed sections of fascia
• Drainpipes that cross where the panel would sit

Photograph the whole frontage and then each obstruction, with a tape measure visible in the frame for scale. Those photos will answer most questions later without a second site visit.

Measuring Width and Height Properly

Use a steel tape rather than a cloth one, and a laser measure for long spans where a tape would sag. Work in millimetres throughout — mixing feet and millimetres is a reliable way to introduce an error.

Measure the width of the fascia in at least three places: near the top, through the middle, and near the bottom. Fascia boards bow, and older timber moves. Record the narrowest of the three as your working width, not the average. Do the same for height at both ends and at the centre, and again take the smallest figure.

Note whether the fascia is a single continuous board or divided by pilasters or decorative brackets, since a panel that spans a pilaster will not sit flat. If the sign is to sit within a recess, allow a small clearance — typically 5 to 10mm on each side — so the panel drops in without forcing. If the fascia has a visible return at each end, measure that depth too, as it affects how the panel is finished and capped.

Fixing Points and What's Behind the Fascia

The substrate decides both the panel and the fixing method, so record what the sign will actually be fixed to.

• Brick or stone: fix into the masonry, not the mortar, and note the joint positions
• Render: can be crumbly and may need longer fixings to reach a sound layer behind
• Timber fascia: check for rot with a probe; sound timber takes screws well
• Aluminium or plastic cladding: rarely load-bearing on its own and may need a backing frame

You also need to know what sits behind the fascia. Cables, pipework, gas meters and junction boxes are common, as are shop fittings and shelving mounted on the inside face. Where a heavy panel is planned, identify structural timbers or solid masonry. Near the seafront, insist on stainless steel fixings — salt-laden air makes short work of plated screws, and a sign that works loose in a winter gale is a problem nobody wants.

Access, Safety and Brighton's Street Realities

Reaching the fascia safely is part of measuring it. A fascia above a shop window is usually within reach of a small step ladder, but anything higher needs a tower or a platform. Check the pavement before you plan the access: narrow streets, heavy pedestrian flow, lamp posts, bins, cycle racks and bus stops all get in the way, and a parking bay may need suspending for a working platform.

Many frontages in central Brighton and Hove sit within conservation areas, and some are listed. Consent may be required, and fixings that avoid damaging historic fabric are often preferred. If in doubt, check before you drill.

Measure during a quiet period where possible, and use two people for anything above head height — one to hold the tape, one to read and write. It is far quicker than doing it twice.

Checking Everything Before You Order

Before the measurements leave your hands, take a second set on a different day if you can, and compare. Small differences are normal; large ones mean something was misread.

Check the following:

• Width and height recorded in millimetres, with the narrowest figures highlighted
• Fixing points marked on the sketch, with the substrate noted for each
• Panel thickness and any return depth confirmed
• Tolerance allowed for expansion and for the panel dropping into a recess
• Obstructions and access notes included alongside the photographs

Send the sketch, the numbers and the photos together, and ask the company making the sign to confirm the sizes back in writing before production begins. That single step catches almost every error while it is still cheap to fix — and it means the panel that arrives on the day is the one that fits.