What Is Aluminium Flat Bar Used for in Joinery Projects?

If you're working on a joinery project and wondering where aluminium flat bar fits in, the short answer is almost everywhere. From edging worktops and cabinets to reinforcing joints and patching up damaged sections, aluminium flat bar uses span nearly every stage of a build. It's one of the most versatile sections in a joiner's toolkit: strong enough to reinforce, thin enough to shape, and easy to cut to exact measurements.

Whether you're finishing a kitchen, repairing a workshop bench, or fabricating something entirely custom, understanding what it can do (and which grade suits your job) makes all the difference to the result. But what is aluminium flat bar? For the uninitiated, let’s start there.

What Is Aluminium Flat Bar?

As the name suggests, flat bar is a flat, rectangular length of aluminium, supplied in a range of widths and thicknesses to suit different jobs. At Click Metal, thinner sections are supplied in 6063 grade, while anything from 1/8 inch (around 3mm) upwards is supplied in 6082 grade, which offers greater strength for structural or load-bearing uses.

Both grades are available in mill finish, which is the natural, unpolished surface straight off the mill. This suits most workshop and fabrication jobs where appearance isn't the priority. If a cleaner, more decorative look is needed, an anodised finish gives the bar a smoother, more durable surface, ideal for visible trims, edging or fittings where looks matter as much as strength. Once you know the right grade and finish, you’re ready to learn more about where flat bar actually gets used.

What Is an Aluminium Flat Bar Used for in Joinery Projects?

So, what is an aluminium flat bar used for in joinery? In practice, it's one of the most flexible materials in a joiner's kit, and its aluminium flat bar uses often cover several jobs on the very same project:

• Edge Trim: Finishes cut edges on worktops, shelving and panels cleanly, protecting them from chipping while giving a neat, professional finish.
• Joining Strip: Bridges two sections of board or panel, holding them flush and level wherever they meet.
• Repair Plate: Reinforces a cracked or weakened joint, screwed or bolted across the damage to restore strength without replacing the whole piece.
• Bracket: Forms simple, strong brackets and supports for shelving, worktops or fixed furniture, cut and drilled to your exact size.

Each of these jobs relies on the same qualities: the bar cuts cleanly, drills easily and holds its shape under load, which is exactly why it turns up so often on site.

Other Everyday Uses for Aluminium Flat Bar

Joinery is only part of the picture. Beyond fitted furniture and cabinetry, aluminium flat bar uses extend into general DIY, renovation and light fabrication work around the home, garden and workshop, wherever a strong, easily shaped strip of metal is useful:

• Reinforcing garden gates and fencing frames
• Edging steps, decking or raised beds
• Trimming shelving units and workshop benches
• Supporting greenhouse panels and cold frames
• Patching worn sections on trailers or sheds
• Strengthening the frame of a garden shed or outbuilding

Because it cuts, drills and bends easily, flat bar tends to become the go-to material for jobs like these: practical, cost-effective to buy exactly to length, and always useful to have some spare in the workshop.

Working With Aluminium Flat Bar: Drilling and Bending

Getting the most from aluminium flat bar uses in your workshop comes down to two basic techniques, and these are drilling and bending. Drilling is straightforward with a standard HSS or aluminium-specific drill bit. Mark your hole centres clearly, use a centre punch to stop the bit wandering, and keep the speed moderate to avoid overheating the metal or clogging the flutes with swarf. Use a drop of cutting fluid, or even a squirt of WD-40, to keep the cut nice and clean.

When it comes to bending, this can often be managed at home, provided you work within the bar's limits. Thinner 6063 sections bend more readily than the thicker, stronger 6082 grade, and a gentle curve is always safer than a sharp, tight fold, which risks cracking the metal along the bend line. For added control over the angle without stressing the material, use a vice and mallet or proper bending brake for repeat jobs.

Whichever technique you're using, patience and the right tool make all the difference to the finish.

Choosing the Right Aluminium Flat Bar Sizes

Picking the right flat bar sizes for your project starts with the job it needs to do. For decorative trims and edging, a narrower, thinner section usually gives the cleanest finish without adding unnecessary bulk. For structural jobs like brackets, repair plates or load-bearing supports, go thicker and choose 6082 grade for the extra strength.

Note that thickness matters as much as width because a bar that's too thin will flex or bow under load, while one that's too thick can be awkward to drill, bend or fit into tight spaces. If you're unsure, it helps to measure the gap or component you're working around first, then work out the thickness and width from there, rather than guessing and adjusting later.

At Click Metal, every flat bar is cut to your exact measurements rather than sold in fixed lengths, with a cutting tolerance of up to 2mm. That means you order precisely what the job needs, with no extra trimming once it arrives.

Aluminium Flat Bar at Click Metal

We've supplied aluminium flat bar to trade and DIY customers for years, backed by over 70 years' combined experience in the metals industry. Every order is cut to size rather than sold off the shelf, so whatever your aluminium flat bar uses, from a single repair plate to a full set of custom brackets, you get exactly the flat bar sizes your project calls for, in 6063 or 6082 grade, mill finish or anodised.

Most orders are processed and despatched within 48 hours, and there's no minimum order charge, so it works whether you need one short length or several metres. If your project calls for something beyond our usual range, our parent company, Doré Metal Services, is on hand to help with larger or more specialist requirements.

Order Your Aluminium Flat Bar, Cut to Size

Whatever you're building, aluminium flat bar cut to your exact measurements takes the guesswork out of the job. Browse our range online and order the size, grade and finish you need. If you can't find exactly what you're after, get in touch through our contact form and we'll do our best to help.

You can also call our team directly on 01794 526090 for advice on grades, sizing or anything else before you order. Precision cut, despatched fast, ready for your next project.