Brickwork is the backbone of most UK homes, providing structural integrity and protection against our unpredictable weather. Over time, exposure to rain, frost,...
Addressing brickwork issues early prevents expensive structural repairs later. Whether it is simple repointing or replacing "blown" bricks, maintaining your masonry preserves both the value and the safety of your property.
What Does the Work Involve?
- Site Assessment: Identifying whether damage is superficial (spalling) or structural (stepped cracks).
- Raking Out: Removing old, decayed mortar to a depth of roughly 15mm-20mm using a traditional hammer and chisel or a mortar rake.
- Brick Removal: Carefully cutting out individual damaged bricks without disturbing the surrounding masonry.
- Sourcing Matches: Finding bricks that match the existing colour, size, and texture, which is particularly vital for period UK properties.
- Mortar Mixing: Preparing a mix that matches the strength and breathability of the original wall (e.g., lime mortar for pre-1920s buildings).
- Laying and Pointing: Bedding new bricks and finishing joints with the appropriate profile (flush, weathered, or bucket-handle).
- Cleaning: Removing excess mortar "snots" and cleaning the brick face to ensure a seamless finish.
Typical Costs
Prices for brickwork repair vary significantly based on access requirements and the age of the property. Expect to pay more for lime mortar work or if scaffolding is required to reach chimneys or upper storeys.
| Item | Low £ | High £ | Notes |
|---|---|---|---|
| Repointing (per m2) | £45 | £85 | Lime mortar is at the higher end. |
| Individual Brick Replacement | £25 | £60 | Price per brick; minimum call-out applies. |
| Crack Stitching (per metre) | £180 | £350 | Includes helical bars and resin injection. |
| Chimney Stack Repointing | £600 | £1,500 | Highly dependent on scaffolding costs. |
| Day Rate (Bricklayer) | £200 | £350 | Excludes materials and waste removal. |
Pro Tip: Always ask if the quote includes "making good." A cheap quote might leave you with a pile of rubble and dusty windows that you have to clean yourself.
How Long Does It Take?
- Small Patch Repairs: 3–5 hours. Ideal for replacing 5-10 "blown" bricks at ground level.
- Single Gable End Repointing: 2–4 days. This depends heavily on the condition of the existing mortar.
- Structural Crack Stitching: 1 day. Typically involves installing stainless steel bars across a crack.
- Chimney Repairs: 2–3 days. This includes the time needed to safely erect and dismantle access platforms.
DIY or Professional?
Small, non-structural repairs like repointing a garden wall are manageable for a confident DIYer. However, any work on the main dwelling should usually be left to a professional bricklayer.
Using the wrong mortar (such as modern cement on a Victorian lime-built house) can cause the bricks to suffocate and crumble within a few seasons. Furthermore, structural cracks require a professional eye to determine if the house is still moving or if the issue is historic.
Choosing the Right Tradesperson
- Check Qualifications: Look for NVQ Level 2 or 3 in Trowel Occupations or City & Guilds certification.
- Experience with Age: If you live in a period property, ensure the tradesperson has specific experience with lime mortar and traditional bonds.
- Insurance: Verify they hold valid Public Liability Insurance (minimum £1 million).
- Questions to Ask:
- How will you match the existing brick colour and mortar texture?
- Does the price include the cost of scaffolding or specialist access?
- How do you intend to dispose of the old mortar and brick debris?
- Will you be using a dust extraction system while raking out joints?
UK Regulations
- Building Regulations (Part A): Generally, minor repairs don't require notification. However, if you are rebuilding more than 25% of a wall, you may need to comply with thermal insulation standards (Part L).
- Listed Buildings: If your home is Grade I or II listed, you must obtain Listed Building Consent before changing the appearance of the brickwork or mortar.
- Party Wall Act: If the repair is on a wall shared with a neighbour, you may need to serve a Party Wall Notice under the Party Wall etc. Act 1996.
Common Problems
- Mortar Mismatch: Using a mortar that is harder than the brick (e.g., strong cement on soft red bricks) causes the brick face to pop off, known as "spalling."
- Colour Banding: Failing to mix enough mortar for the whole job can result in different shades across your wall once dried.
- Ignoring the Cause: Repairing a crack without fixing the leaking gutter or subsided foundation that caused it will result in the crack returning.
- Poor Weather Timing: Fresh mortar can be ruined by heavy rain or "blown" by frost if not properly protected with hessian.
Frequently Asked Questions
Can I just paint over cracked bricks?
No. Painting over damaged brickwork traps moisture behind the paint film. This accelerates the decay of the brick and can lead to severe damp issues inside your home.
What is "spalling" and why does it happen?
Spalling is when the face of the brick flakes or crumbles away. It is usually caused by water entering the brick and freezing, or by using a mortar that is too hard, forcing moisture to escape through the brick rather than the joint.
Do I need scaffolding for first-floor repairs?
Usually, yes. For safety and precision, bricklayers need a stable platform. While some small jobs can be done from a tower or ladder, most reputable tradespeople will insist on scaffolding to meet Health and Safety (HSE) standards.
How do I know if a crack is structural?
Generally, cracks wider than 5mm, or "stepped" cracks that follow mortar lines and are wider at the top than the bottom, suggest movement. You should consult a structural engineer or a specialist bricklayer immediately.
Why is lime mortar more expensive?
Lime mortar requires more skill to mix and apply, and it has a much slower setting time. It often requires protection from the elements for several days, increasing the labour time and material costs.
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
