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Repoint stonework.
Lime mortar repoint of stone walls or façades — heritage-grade, breathable, period-correct.
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Cement mortar on old stone
Cement is harder than soft stone — frost forces brick face to spall instead of mortar. Massive heritage damage.
Power-tool grinding
Angle grinder racks open joints and chips stone. Hand-raking only on heritage.
Wrong sand colour
New mortar visibly different from old. Local sand for true match.
Pointing recessed too far
Deep-recessed joints collect water and look "tooth-like". Flush or struck-back flush is correct for most heritage.
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
Hand-raked lime repointing per m²Heritage specification
£60–£140/m²
Cement mortar repointing per m²Post-1919 buildings only
£40–£90/m²
Whole-house repointing (terraced)50–70 m²
£2.5k–£6.5k
Detached house repointing100–150 m²
£4.5k–£12k
Listed building repointingHeritage rate
£4.5k–£15k
Scaffold hire (1–2 weeks)For elevated work
£500–£1.5k
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At a glance
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Stone repointing replaces failed mortar in stone walls — essential maintenance for heritage buildings. Wrong mortar (cement on old stone) causes irreversible damage. Expect to pay £40–£140 per m² for UK stone repointing.
What Does the Work Involve?
Existing mortar raked out by hand (no power tools on heritage stone) to 25–40mm depth. Joint cleaned. New mortar mixed to match original — typically lime mortar (NHL 2 or NHL 3.5) for pre-1919 buildings; cement mix for post-1919. Mortar pressed into joints in two passes. Brushed back to flush or recessed finish to match existing. Cures over 2–4 weeks.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Hand-raked lime repointing per m² | 60 | 140 | Heritage specification |
| Cement mortar repointing per m² | 40 | 90 | Post-1919 buildings only |
| Sand colour matching | +£10 | +£30 | Per m² for exact match |
| Whole-house repointing (terraced) | 2,500 | 6,500 | 50–70 m² |
| Detached house repointing | 4,500 | 12,000 | 100–150 m² |
| Listed building repointing | 4,500 | 15,000+ | Heritage rate |
| Scaffold hire (1–2 weeks) | 500 | 1,500 | For elevated work |
How Long Does It Take?
Single elevation (50 m²): 1–2 weeks. Whole-house: 3–5 weeks. Plus scaffold time.
DIY or Professional?
Professional only — particularly for lime mortar work. Wrong mix or technique damages stone permanently.
Choosing the Right Tradesperson
SPAB-accredited heritage stonemason. NHL mortar experience required. Test panel before full job. Get warranty in writing (10+ years on workmanship).
UK Regulations
Listed buildings need consent. Conservation areas may require lime mortar. SPAB guidelines de facto standard.
Common Problems
- Cement mortar on old stone: Cement is harder than soft stone — frost forces brick face to spall instead of mortar. Massive heritage damage.
- Power-tool grinding: Angle grinder racks open joints and chips stone. Hand-raking only on heritage.
- Wrong sand colour: New mortar visibly different from old. Local sand for true match.
- Pointing recessed too far: Deep-recessed joints collect water and look "tooth-like". Flush or struck-back flush is correct for most heritage.
Frequently Asked Questions
Lime or cement mortar?
Pre-1919 buildings: NHL lime mortar (2 or 3.5 grade). Post-1919: cement mortar acceptable. Cement on old stone causes irreparable damage.
How long does repointing last?
Quality lime mortar: 50–100 years. Cement mortar: 20–40 years. Both vulnerable to weather exposure on south-west elevations.
When does my house need repointing?
Mortar joints raked out by finger or coin: yes. Visible water staining below joints: yes. Frost-spalled stone faces: urgent.
What's NHL mortar?
Natural Hydraulic Lime — graded 2 (softest), 3.5, or 5 (strongest). NHL 2 for softer stones; NHL 3.5 most common; NHL 5 for exposed marine locations.
Cost of whole-house repointing?
Standard semi-detached: £3,500–£8,500. Detached: £4,500–£12,000. Heritage listed: £4,500–£15,000+.
Can I DIY a small area?
Cement repointing on modern brick: yes. Lime mortar on heritage stone: no — requires apprenticed skill and the right mortar mix.
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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