Breathable Paint for Interior Walls & Lime Plaster

Breathable paints are designed to allow moisture or water vapour to pass through the surface, rather than trapping it inside your walls. In homes where damp is present, particularly solid wall traditionally built properties, breathability is essential. It allows moisture a clear route to escape, avoiding damage to walls and paint finish.

You'll see plenty of products labelled as breathable paint, but the term is often used loosely confusing customers. True breathability is measured by SD value, the lower the number the easier it is for moisture vapour to pass through the paint.

When damp prone walls are painted with conventional paints the moisture can build up behind the paint (due to most paint being made from plastic) which eventually destroys the plaster, which can cause no end of issues. Damp walls cause mould and mildew, which using breathable paint can help avoid.

Breathable paint for lime plaster: If painting over lime plaster, Auro 344 is ideal as it is a lime based paint, although Auro 555 is compatible if you want colours. Bare plaster? Use this plaster primer.

Among the most breathable finishes are the mineral paints from Graphenstone.

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Showing 16 products
Air Purifying Interior & Exterior Paint, Colours | Graphenstone Ambient Pro
From £36.00
Air Purifying Interior & Exterior Paint, Colours | Graphenstone Ambient Pro
Rating: 4.6 out of 5 (5)
For all surfaces - from £27.90 per litre.
⭐ TOP for Indoor air quality - 🎨 14 Colours
THE top end option! Naturally purify your indoor air, decontaminate the pollutants in the air, and reduce odours. Lime based natural paint that decomposes organic compounds and inorganic gases. Suitable for even the novice DIYer,...
£36.00
Interior Wall Paint, Lime & Silicate, Colours - Heritage Graphenstone GCS Interior
From £34.50
Interior Wall Paint, Lime & Silicate, Colours - Heritage Graphenstone GCS Interior
Rating: 5.0 out of 5 (9)
For over all paints, lime or gyspum plasters. From £24.90 per/L.
✅ Top selling lime paint - White & 🎨 Colours
Universal Interior lime based natural paint for normal plaster, lime plaster, gypsum, brick, stone, tiles, as well as old paints and even unpainted wall paper. GCS Exterior is also available for all exterior walls. This...
£34.50
Natural Mineral Based Breathable Interior Paint, Graphenstone Grafclean
From £26.00
Natural Mineral Based Breathable Interior Paint, Graphenstone Grafclean
Rating: 4.88 out of 5 (68)
For use over existing paints & plasters, from £19.60 per litre. Next Day Delivery
✅ TOP SELLING - 🎨 120 Colours & White
I love this paint!  Universal interior wall paint for overpainting existing paints, plasters and most surfaces. Easy to use. Grafclean is our hero paint & top selling premium eco paint for walls & ceilings. Staff...
£26.00
Earthborn Claypaint, Colours - Breathable & Non Toxic
From £59.95
Earthborn Claypaint, Colours - Breathable & Non Toxic
Rating: 4.86 out of 5 (66)
From £19.20 per litre. (3-5 Day Delivery)
✅ TOP SELLING - Colours & White
Top selling eco friendly gorgeous clay paint for interior walls. Ultra matt, breathable and suitable for all rooms. Virtually VOC free. 
£5.50
Natural Lime Paint - Breathable & Very Low VOC - Auro 344 White
From £65.00
Natural Lime Paint - Breathable & Very Low VOC - Auro 344 White
Rating: 5.0 out of 5 (21)
From £12 per litre
✅ Top selling lime paint
Auro 344 is a traditional mineral paint based on aged slaked lime. This high grade lime paint offers breathability, helps prevent mould growth and absorb odours for a healthier home environment. Suitable for use as...
£65.00
Natural Emulsion Paint, White, Breathable Interior - Auro 524
From £55.00
Natural Emulsion Paint, White, Breathable Interior - Auro 524
Rating: 4.93 out of 5 (28)
From £14 per litre | Next Day Delivery
✅ TOP SELLING - WHITE
Our top selling white paint. A highly breathable, with only trace VOCs (There is no such thing as VOC free) technically superior matt emulsion in brilliant white. AURO’s highest quality natural white interior emulsion paint....
£90.00
Exterior Wall Paint, Lime Silicate, Colours - Heritage Graphenstone GCS Exterior
From £36.00
Exterior Wall Paint, Lime Silicate, Colours - Heritage Graphenstone GCS Exterior
Rating: 4.5 out of 5 (4)
For over all paints & renders - universal
🎨 Lots of Colours available
Universal exterior lime based natural paint for lime render, brick, old paints, brick, mortar, concrete and many others. Ideal for walls with multiple surface types or tricky substrates. Graphenstone GCS Exterior is perfect for restoration...
£36.00
Natural Clay Paint, White - Breathable & Non Toxic - Auro 331
From £53.00
Natural Clay Paint, White - Breathable & Non Toxic - Auro 331
Rating: 5.0 out of 5 (14)
From £17 per litre
✅ TOP SELLING - WHITE
This highly breathable Natural Clay paint is a specially formulated and beautiful paint, especially suitable for older properties and lime walls.High grade Auro Clay Paint has a thick, creamy consistency which makes application easy. The...
£5.50
Natural Anti Mould Paint for walls and ceilings - Auro 327 White
From £27.00
Natural Anti Mould Paint for walls and ceilings - Auro 327 White
Rating: 5.0 out of 5 (14)
From £15.80 per litre
✅ Standard Anti Mould
White anti mould paint for walls & ceilings. Breathable, non toxic with a slight texture. A lime-based anti mould emulsion paint by Auro with a higher pH value to effectively prevent the growth of mould...
£27.00
Natural Mould Resistant Silicate Paint - Auro 303 White
From £110.00
Natural Mould Resistant Silicate Paint - Auro 303 White
Rating: 5.0 out of 5 (4)
From £19.50 per litre
✅ Premium Anti Mould
Our top performing natural anti mould emulsion paint by Auro Paints. The silicate based problem solver for interior walls prone to mould growth. It has a fungicidal and algicidal effect thanks to its alkalinity. A...
£110.00
Photocatalytic Lime Paint That Breaks Down Air Pollutants - Auro 328 Airfresh
From £110.00
Photocatalytic Lime Paint That Breaks Down Air Pollutants - Auro 328 Airfresh
Rating: 5.0 out of 5 (4)
From £18 per litre
Breaks down indoor air pollution
A scientifically developed white natural paint by Auro Paints that breaks down airbourne pollutants and odours through a photocatalytic effect. Proven to remove 95% of formaldehyde within 2 hours - this doesn't absorb pollutants it...
£110.00
Natural Chalk Paint - Economical Breathable Paint for Historic Buildings - Auro 326
£85.00
Natural Chalk Paint - Economical Breathable Paint for Historic Buildings - Auro 326
Rating: 5.0 out of 5 (6)
An economical, off white super matt paint. Hygroscopic to allow good breathability for walls; this is perfect for older, historic buildings. Zero VOC. A bit like old fashioned distemper. This paint first looks semi transparent...
£6.00
Earthborn Ecopro White Matt Emulsion
On Sale from £61.50
Earthborn Ecopro White Matt Emulsion
From £8.90 per litre
✅ TOP SELLING - WHITE
Earthborn Ecopro Matt Emulsion is a low odour, environmentally sound alternative to conventional emulsions. Suitable for internal walls and ceilings and can be used on dry, porous and grease-free surfaces i.e. wallpaper, wood, plaster and...
Up to -7%
£61.50 £62.50
Economy Natural Emulsion Paint, White - Auro 321
From £55.00
Economy Natural Emulsion Paint, White - Auro 321
Rating: 5.0 out of 5 (30)
From £9.50 per litre
Economy white natural emulsion paint for walls and ceilings. Not quite as bright white and thick as the Auro 524, but much cheaper. High quality, emission-free emulsion wall paint in matt finish. Great all-round emulsion...
£55.00
Quiet White - Natural Matt Wall Paint by Soil & Sky
From £50.00
Quiet White - Natural Matt Wall Paint by Soil & Sky
Rating: 5.0 out of 5 (1)
From £16.50 per litre
❇️ NEW for 2026!
A calm, flawless matt emulsion, bound with linseed and safflower oil instead of acrylic plastic. Made from 99% renewable and mineral raw materials, solvent-free, with barely any VOC, and class 1 coverage (the highest), so...
£50.00
Mineral White – Natural Silicate Paint for Damp & Mould-Prone Rooms
From £28.00
Mineral White – Natural Silicate Paint for Damp & Mould-Prone Rooms
From £19.50 per litre
❇️ NEW for 2026!
Mineral White is a true silicate paint (potassium silicate, chalk and mineral pigment, not plastic) that bonds into your wall for a deep, flat, stone-like matt. A natural high-grade silicate, and the breathable choice for...
£5.50

How is paint breathability measured?

Fundamentally, breathability is measured using an SD value, which is known also as “equivalent air layer thickness”. The lower the SD value, the more permeable the paint is for water vapour to have the ability to pass through. This is a good thing, we want moisture to be able to exit the walls (through the paint), as this stops mould and mildew growth.

Does breathable paint prevent mould?
Yes, breathable paint helps prevent mould by letting moisture evaporate through the paint layer. This reduces the presence of damp, which is a key driver of mould growth. Lime based paints are particularly effective due to high breathability and naturally alkaline ph which provides natural mould resistance.

Are clay paints breathable?

Clay paints are also very breathable and a common choice.

What is a good SD value?

Anything below 0.5 is great, and more than enough for most homes. This 0.5 Sd value means that the paint “has the same vapour resistance of 0.5 metres of still air”. SD values are put into classes, and SD Class 1 shows the highest level of breathability (SD value of less than 0.14m)

SD Classes of Breathability

SD Class 1 - Highly Breathable - 0 to 0.14m

SD Class 2 - Moderately Breathable - 0.14 to 0.5m

SD Class 3 - Limited Breathablity - 0.5 to 1.5m

SD Class 4 - Low Breathability - 1.5m+