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Repoint with lime mortar.
Heritage repointing for pre-1900 brickwork — soft lime joints that breathe, no Portland-cement damage.
✓ Updated May 2026✓ Free quotes✓ Vetted pros
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Wrong lime grade
— NHL 5 too hard for soft brick; NHL 2 too soft for exposed work.
Insufficient curing
— short cures don't allow lime to carbonate.
Frost damage during cure
— uncured lime washes out or freezes.
Wrong sand
— angular sharp sand needed; rounded plaster sand fails.
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
Natural hydraulic lime (NHL 2 or 3.5)Most common heritage spec
£70–£120
Hot lime (traditional)Pre-1900 properties
£90–£180
Specialist conservation mortarListed buildings
£120–£200
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
InfographicThe Bricklayer briefing.
Infographic
Bricklayer quick-view
Lime mortar pointing is the specialist heritage version of repointing — using lime (calcium hydroxide) rather than cement as the binder. It's essential for pre-1919 brickwork, soft heritage bricks, and listed buildings. This guide covers what lime mortar pointing costs in 2026, what makes it different from cement work, and how to find a specialist.
Lime is more expensive, slower to cure, and weaker than cement — but that's actually the point. Soft mortar moves with brick expansion rather than cracking the brick.
What Does the Work Involve?
- Raking out old mortar (whether cement or original lime) to clean void.
- Cleaning the joint with brush and water.
- Mixing lime mortar — natural hydraulic lime (NHL) plus sharp sand, ratios per situation.
- Pointing joints firmly, building up in layers if deep.
- Long curing under controlled conditions — 4–8 weeks minimum.
- Protection from rain and frost during cure.
Typical Costs
| Item | Low £/m² | High £/m² | Notes |
|---|---|---|---|
| Natural hydraulic lime (NHL 2 or 3.5) | 70 | 120 | Most common heritage spec |
| Hot lime (traditional) | 90 | 180 | Pre-1900 properties |
| Specialist conservation mortar | 120 | 200 | Listed buildings |
| Scaffolding (if needed) | +£500 | +£3,000 | Per project |
Premium reflects skilled labour and slower work pace. Worth it for the right buildings.
How Long Does It Take?
- Pointing rate: 30–50% slower than cement.
- 30 m² wall: 5–7 days for pointing.
- Cure: 4–8 weeks under sheet (cement is 7 days).
- Avoid winter pointing — frost destroys uncured lime.
DIY or Professional?
Specialist conservation pointers only. The wrong technique, mix, or curing destroys both the mortar and potentially the bricks.
Choosing the Right Tradesperson
- Look for SPAB (Society for the Protection of Ancient Buildings) trained masons.
- Past lime work portfolio aged 5–10 years.
- Discuss specific lime type (NHL 2, NHL 3.5, NHL 5).
- Confirm protection plan during cure.
UK Regulations
- Listed properties: lime mortar often a planning condition.
- Conservation areas: may require traditional mortars.
- SPAB and Historic England publish guidance.
Common Problems
- Wrong lime grade — NHL 5 too hard for soft brick; NHL 2 too soft for exposed work.
- Insufficient curing — short cures don't allow lime to carbonate.
- Frost damage during cure — uncured lime washes out or freezes.
- Wrong sand — angular sharp sand needed; rounded plaster sand fails.
- Application in wrong weather — too hot or too cold both fail.
Frequently Asked Questions
What's NHL?
Natural Hydraulic Lime — graded NHL 2, 3.5, or 5 by strength. NHL 3.5 is the most versatile heritage mortar.
What's hot lime?
Traditional lime made by slaking quicklime on site. Used for pre-1900 work. Higher skill needed, requires specialist supply chain.
Can I use lime in winter?
No — frost destroys uncured lime. Specialist masons protect work or schedule for spring-autumn.
How long does lime mortar last?
Properly applied and cured: 100+ years. Many original lime mortars are still serviceable after 200+ years.
Will it match my existing mortar?
Yes — sand colour, lime type, and finish can be matched. Bring samples to specialist supplier.
How do I find a SPAB-trained mason?
SPAB website lists trained members. Heritage suppliers can also recommend local specialists.
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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