If your walls could talk, they’d probably tell you when they’re feeling damp. And in homes made with brick, one of the most common complaints is hidden moisture making its way through cracks and joints. Over time, even well-built brickwork can become vulnerable—especially if the mortar starts to break down. That’s where brick repointing comes in: a vital fix that many homeowners overlook until it’s too late.
Understanding how moisture gets in—and what you can do about it—can save you money, hassle, and potential structural issues down the line.
Why Brick Walls Let Moisture In
Brick itself is surprisingly good at handling moisture. It can absorb and release small amounts of water without much trouble. But the real problem usually lies in the mortar—the material between the bricks that holds everything together. When mortar starts to crumble, crack, or fall away, it leaves tiny pathways for rainwater to seep into your walls.
If left unchecked, this can lead to:
- Internal damp patches
- Mould or mildew
- Timber rot behind the walls
- Damage to insulation or plaster
Moisture may start outside, but it doesn’t stay there for long.
Signs Your Mortar Needs Attention
You don’t need to be a builder to spot the signs of damaged mortar. Take a slow walk around your home and look for:
- Cracks or gaps in the mortar lines
- Powdery or flaking mortar
- Discoloured bricks or streaks on the wall (a sign water is running through)
- Damp spots on interior walls, especially after rain
These are early indicators that water is finding a way through—and action is needed.
What Is Repointing, Exactly?
Repointing is the process of removing old, damaged mortar and replacing it with new material. It might sound like a basic patch-up job, but when done right, it:
- Seals the wall against moisture
- Reinforces the structural integrity of your brickwork
- Improves energy efficiency
- Enhances your home’s appearance
It’s one of those small investments that pays off in both protection and value.
DIY or Call the Pros?
For small sections or low garden walls, confident DIYers can tackle repointing themselves with a bit of prep. But for large areas—especially walls on multi-storey homes—it’s usually worth calling in a professional. A good mason knows how to match the existing mortar, protect the bricks, and apply the new joints in a way that’s both strong and neat.
Getting it wrong can do more harm than good, so weigh up the risk before starting.
Preventing Future Moisture Issues
Fixing your mortar is a great first step—but you can go further to keep moisture out for good. Here’s how:
1. Inspect Regularly
Make it a habit to check your external walls once or twice a year. Spotting damage early is the best way to avoid expensive repairs later.
2. Maintain Gutters and Downpipes
Overflowing gutters or leaking pipes can soak brickwork over time. Keep them clean and pointed away from your walls.
3. Avoid Painting Over Brick
Some paints trap moisture inside the wall instead of letting it breathe.
If you want a clean look, use breathable coatings made specifically for masonry.
4. Watch the Landscaping
Soil that sits too high up the wall, or plants that grow close to the bricks, can trap moisture where you don’t want it. Trim back and give your walls space to stay dry.
When to Act Fast
If you see moss growing on your walls or notice that internal paint is peeling or bubbling, don’t wait. Moisture damage accelerates quickly—and once water gets behind your walls, it becomes harder and costlier to fix.
Repointing might not be the flashiest renovation project, but it’s one of the most important when it comes to preserving the health of your home. Addressing the problem before it escalates is the difference between a simple patch job and a full-blown repair.
Brick homes are built to last—but only if you help them stand up to the elements. Moisture might be sneaky, but with the right care and attention, you can keep it exactly where it belongs: outside. A bit of maintenance today could save your brickwork for decades to come.
