A lime mortar specialist repairs and repoints historic masonry using traditional lime mortars matched in composition, colour and texture to the original - maintaining the breathability and flexibility that solid-wall historic buildings depend on. Cement repointing on old stone and brick is one of the most common forms of heritage building damage: the harder cement traps moisture and salt, causing the softer masonry face to spall away. A lime mortar specialist removes cement pointing by hand and reinstates compatible lime mortar.
What they do
- Rake out failed, inappropriate or eroded pointing by hand
- Carry out mortar analysis to match original composition
- Mix and apply lime mortars matched to the original
- Repoint rubble stone, ashlar, brick and flint masonry
- Remove harmful cement pointing from historic masonry
- Prepare sample panels for conservation officer approval
- Advise on appropriate lime mortar specification
- Carry out conservation repointing under listed building consent conditions
When you need one
A lime mortar specialist is needed for any repointing work on pre-1919 masonry buildings, listed buildings and heritage masonry of any age.
Typical costs (UK, 2025)
| Job type | Typical cost |
|---|---|
| Traditional lime repointing (per sq m) | £40 - £85 / m² |
| Mortar analysis and matching | £200 - £500 |
| Heritage masonry assessment report | £300 - £700 |
| Sample panel for approval | £150 - £350 |
| Specialist conservation repointing (ashlar) | £80 - £150 / m² |
| Hourly rate | £35 - £65 / hr |
Costs rise significantly where cement must first be removed by hand before lime repointing can begin. Removal of inappropriate cement from large areas is very labour-intensive but essential.
Qualifications to look for
The Society for the Protection of Ancient Buildings is the primary reference for craftspeople working with traditional materials. SPAB membership or a SPAB scholarship indicates a commitment to conservation principles. Find at spab.org.uk.
Guild membership for specialist lime mortar contractors requires evidence of quality and professional standards. A useful secondary indicator of competence.
How to find a reputable lime mortar specialist
Frequently asked questions
How do I know if my pointing needs replacing?
Pointing that is soft, crumbling, missing or has been replaced with hard cement mortar is in need of attention. Cement mortar can often be identified by its grey colour and hardness - if it is harder than the surrounding masonry it must be removed before it causes further damage through moisture entrapment and freeze-thaw cycles.
How is lime mortar removed without damaging the masonry?
Only hand tools - raking chisels and specially shaped raking tools - should be used. Angle grinders and mechanical tools are never appropriate on historic masonry as they inevitably damage the irreplaceable faces of stones or bricks. Removing failed cement pointing by hand is slow work but essential to preserving the masonry.
What is hot mix lime mortar?
Lime mortar made from freshly slaked quicklime mixed immediately with aggregate - historically how all lime mortar was made. It produces a mortar with exceptional bond and workability. Specialist contractors can source and prepare hot mix lime on site for high-quality conservation work where maximum authenticity and performance are required.