When repairing older brickwork, the challenge is often to make the new blend seamlessly with the old. Colour, mortar, and texture must harmonise so that the repair looks natural rather than patched. Achieving this requires patience, an eye for detail, and an understanding of the building’s history. Here’s a guide to repairing older brickwork with new bricks – discreetly and sympathetically.

Understand the Age and Character of the Brickwork

Before starting, take time to understand the age and type of the existing brickwork. Bricks have changed significantly over the centuries in size, colour, and firing method. A Victorian wall, for example, will usually have smaller, softer, and more irregular bricks than one built in the 1960s. Mortar types also vary: older buildings often used lime mortar, while modern ones rely on cement-based mixes.

Check the following:

• Brick size – measure height, length, and depth carefully.
• Colour and surface texture – is it smooth, rough, glossy, or matte?
• Mortar colour and composition – lime mortar is softer and lighter than cement mortar.

The better you understand the original materials, the easier it will be to find suitable replacements.

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Finding the Right Bricks

Sourcing new bricks that match old ones can be tricky, but there are several options available in the UK. Many brick manufacturers still produce traditional sizes and colours, and some specialise in heritage or conservation projects.

Consider:

• Reclaimed bricks – available from demolition yards, they already have the weathered look that suits older buildings.
• New handmade or “weathered” bricks – many British brickworks offer ranges designed to replicate historic styles.
• Subtle ageing techniques – in some cases, new bricks can be toned down with limewash or a light slurry to blend better.

Always take a few sample bricks home and compare them against the existing wall in natural daylight. Even small colour differences can become obvious once the bricks are laid.

Mortar – the Invisible Link

Even the best-matched bricks can stand out if the mortar doesn’t match. Mortar colour and texture make up a large part of a wall’s overall appearance. Take time to mix a mortar that matches both in tone and consistency.

• Lime mortar is ideal for older brickwork because it allows the wall to breathe and move naturally.
• Cement mortar is harder and should only be used if the original wall was built with it.
• Colour adjustment can be done with natural pigments, but always test on a small area first.

When repointing, ensure the joints match the existing depth and profile. This is often where the difference between old and new becomes most visible.

Carry Out the Work with Care

When removing damaged bricks, work carefully to avoid harming the surrounding ones. Use a hammer and chisel with precision, and remove all old mortar so the new bricks sit firmly in place.

Lay the new bricks with the prepared mortar, ensuring they align with the existing courses. Repoint once the mortar has started to firm up, shaping the joints to match the original style.

It’s best to work in small sections so you can continually assess how well the repair blends in.

Finishing and Patination

Even with careful work, new bricks may initially look too fresh. Over time, weathering will soften the contrast, but you can help the process along.

• A light limewash can tone down bright colours.
• A thin lime slurry can create a more uniform appearance.
• Avoid paint or sealants, as they can trap moisture and damage the wall.

The goal is for the repair to look natural – as though it has always been part of the building.

Preserve the Building’s Character

Repairing older brickwork is not just about technique; it’s about respecting the building’s original character. A discreet repair preserves the charm and integrity of the property, ensuring it remains both beautiful and structurally sound for years to come.

With the right materials, patience, and attention to detail, you can achieve a result that is durable, harmonious, and almost invisible.