A lime plasterer is a specialist who applies traditional lime-based plasters internally and lime renders externally to historic and heritage buildings. On pre-1919 solid-wall construction, lime is the only appropriate plastering material - modern gypsum and cement products trap moisture and cause spalling, salt damage and structural harm to irreplaceable masonry. SPAB involvement and familiarity with Historic England guidance are the key quality indicators for a lime plasterer working on listed buildings.
What they do
- Apply lime render externally to stone, brick and earth walls
- Apply internal lime plaster in two- or three-coat systems
- Restore and repair ornamental lime plasterwork
- Specify lime mixes matched to the substrate
- Carry out sample panels for planning approval
- Advise on mortar analysis and specification
- Re-plaster after damp treatment using appropriate lime products
- Work to SPAB and Historic England guidance on traditional materials
When you need one
A lime plasterer is required on any pre-1919 solid-wall building and on all listed buildings where plastering or rendering work is needed.
Typical costs (UK, 2025)
| Job type | Typical cost |
|---|---|
| Lime render (external, per sq m) | £40 - £90 / m² |
| Internal lime plaster (per sq m) | £30 - £60 / m² |
| Ornamental plaster restoration (per sq m) | £100 - £300 / m² |
| Sample panels and specification advice | £300 - £600 |
| Heritage assessment and mortar analysis | £400 - £800 |
| Hourly rate | £35 - £65 / hr |
Lime work is more labour-intensive than modern plastering - the material requires longer drying times between coats and careful curing. Costs reflect this skill. Do not accept quotes based on modern plastering day rates for lime work.
Qualifications to look for
The Society for the Protection of Ancient Buildings identifies craftspeople who follow traditional repair principles. SPAB membership or a SPAB scholarship is a strong indicator of genuine lime skills. Find practitioners at spab.org.uk.
Historic England's Building Skills Register lists craftspeople with proven heritage skills including lime plastering. A useful additional reference alongside SPAB membership.
How to find a reputable lime plasterer
Frequently asked questions
Why must lime plaster be used on old buildings?
Lime plaster is breathable and flexible - it allows moisture to move through the wall and evaporate. Modern gypsum plasters and cement render trap moisture in the wall, leading to salt crystallisation, spalling and long-term structural damage to the masonry. For pre-1919 solid-wall buildings, lime is essential to allow the building to breathe.
What is the difference between lime putty and hydraulic lime?
Lime putty (non-hydraulic lime) sets slowly by carbonation and is very flexible - ideal for the softest stones and brickwork. Hydraulic lime sets by a chemical reaction with water and is harder and more resistant to wet conditions. The strength should always be matched to the substrate - a stronger mix than the masonry will cause damage.
Can I use ordinary building plaster on a listed building?
You should not use gypsum or cement-based plasters on solid-walled historic buildings - always use lime-based products. For listed buildings, your local planning authority may specify lime requirements as a condition of listed building consent. Using the wrong material risks both the fabric of the building and your consent compliance.