Ty-Mawr Limewash

Limewash- mineral paint from lime putty

'Limewash has been used for thousands of years as a decorative and protective finish for internal and external wall applications. It has gained popularity again because it is 'technically' correct for use on old buildings (i.e. it allows moisture to evaporate) which helps to protect the building fabric and maintain a healthy environment. It is also 'kinder' to the environment than modern alternatives.

Limewash is made from slaked quicklime and water. It sets through a natural process known as carbonation i.e. it absorbs carbon dioxide given off during burning gradually returning to its original form (CaCO3), it then naturally weathers and degrades, returning to the ground, hence creating a cycle - the Lime Cycle


• is vapour permeable and so allows the wall to ‘breathe’ i.e. to control moisture levels

• gives the building a lively texture and has a soft matt finish

• has some antiseptic and antibacterial properties

• is VOC-free so does not contribute to indoor air pollution

• made in Wales using British lime

Suitable for:

• all stable porous backgrounds – masonry, brick, lime plaster and old limewash paints.

Not suitable for:

• modern gypsum plasters, synthetic paints, cement renders or concrete.

Colours available:

• download brochure below for colour chart.


• Keep out of reach of children.
• Wear protective gloves/protective clothing/eye protection/face protection
• A Safety Data Sheet is available from Ty-Mawr Lime Ltd on request.'


(Text provided by manufacturer)

  • Ty-Mawr Limewash
  • LImewash

Environmental metrics

Company credentials
British Standards Institute - Integrated Management System (9001:2015 and 14001:2015),
Ethical Accreditation,
RIBA Accredited CPD'S

Non-hydraulic lime

Element application(s)
Walls & Ceilings

Element application zone
External and internal wall finishes

Functional advantage(s)
Vapour permeable

Recycled content

Country of manufacture
Wales (UK)

Manufacture details

Ty-Mawr Lime

Unit 5 & 12, Brecon Enterprise Park, Brecon, LD3 8BT

01874 611350

Selection Criteria

PASS endorsement is based upon a distinguished performance in these categories:

Raw material acquisition

  • Resource efficiency: Abundant and accessible material

Product use

  • Occupant health / comfort: Facilitates indoor air quality
  • Whole life costing: Easy / inexpensive maintenance

Construction properties

  • Facilitates 'Breathing' (vapour-open) construction
  • Facilitates moisture permeability
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