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Spalling brick, dropped wall, want a new extension? Describe what you've got — the AI tells you whether it's a repointing job, a rebuild or a structural call.
A guide to crumbling mortar.
How to tell when joints need repointing, what damage waiting does, and what a fair repoint costs.
✓ Updated May 2026✓ Free quotes✓ Vetted pros
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Stretcher vs Flemish bond, NHL lime, cavity ties, weep holes, DPC heights. Know what good looks like before the first course is laid.
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Top tips
Hiring a bricklayer, without the regret.
Four moves that separate a smooth job from a nightmare.
Match the brick before they start.
On extensions and repairs, sourcing the right brick is harder than laying it. Insist on a sample wall — three courses, on-site, in your light — before they buy the pallet.
Get the mortar mix in writing.
Lime mortar, cement mortar, NHL grade — the wrong mix on the wrong brick spalls in five winters. Ask which mix and why.
Check the bond before pointing.
Stretcher, Flemish, English — the bond should match the existing wall, especially on period properties. Catch it at first course, not after pointing.
Insist on a damp-proof course.
Any external wall needs a DPC at the right height — 150mm above finished ground level. A missing or wrong DPC creates damp problems you'll be fixing for years.
Costs & timeline
Know what it costs. Know when it ends.
Indicative UK ranges and what affects price.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
Day rate
£200–£350/day
Brickwork (per m²)Inc. labour, ex. bricks
£80–£160/m²
Repointing (per m²)
£30–£70/m²
Garden wall (per linear m)1m high, single skin
£120–£280
Chimney rebuild
£1.8k–£4.5k
Brick arch (over opening)
£350–£900
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
InfographicThe Bricklayer briefing.
Infographic
Bricklayer quick-view
Mortar joints are the first part of brickwork to fail — they weather faster than bricks, and once they start crumbling, water gets behind the bricks and the damage accelerates. This guide covers when crumbling mortar means it's time to repoint, what waiting costs, and the schedule that protects your house.
Most UK brick walls need repointing every 30–80 years depending on mortar type, exposure, and original quality.
Signs Mortar Needs Repointing
- Mortar dust or grit at base of wall.
- Joints recessed below brick face significantly.
- Mortar can be picked out with fingernail or coin.
- Gaps visible between bricks.
- Water staining inside the house at junctions.
- Mortar visibly degraded compared to good areas.
The Damage Sequence
- Mortar joint weathers and crumbles.
- Water gets behind the brick face.
- Frost-thaw cycles damage the brick from behind.
- Bricks loosen and may fall.
- Eventually structural damage.
Cost to fix at each stage roughly doubles.
Cost of Repointing vs Waiting
| Stage | Action | Cost |
|---|---|---|
| Early degradation | Repoint (4 walls) | £2,000–£5,000 |
| Brick faces spalling | Repoint + brick replacements | £3,500–£8,000 |
| Loose bricks | Partial rebuild + repoint | £5,000–£15,000 |
| Structural damage | Major repair / rebuild | £10,000–£30,000+ |
How to Plan Repointing
- Inspect annually (spring after winter).
- Plan repointing 5–10 years before total failure.
- Repoint exposed walls first (north + west).
- Coordinate with painting or external works.
- Budget 1–2% of property value as recurring maintenance.
UK Regulations
- Listed properties: consent for repointing.
- Conservation areas: may specify materials.
Common Problems
- Delaying repair — costs escalate quickly.
- Patchy DIY repair — non-matching mortar.
- Wrong mortar type — cement on heritage = irreversible damage.
- Missing the cause — joint failure may indicate damp problems.
Frequently Asked Questions
How do I know mortar needs repointing?
Test with finger or coin — if you can scratch out 10 mm or more, it needs repointing.
How long can I wait?
Once visible degradation starts, plan repair within 2–5 years. Waiting longer doubles the cost.
Can I repoint in winter?
Avoid sub-5°C temperatures. Don't repoint in frost or rain.
Is repointing the whole wall always needed?
No — partial repointing of degraded areas works. But if 30%+ of joints are failing, doing the whole wall is more economical.
How long does new pointing last?
Cement: 30–50 years. Lime: 50–100 years. Depends on exposure and brick.
Will my insurance cover repointing?
Gradual deterioration usually not. Storm-caused damage may be. Check policy.
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.
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