Older properties have charm, character, and architectural features that modern buildings just can’t match. Thick stone walls, traditional woodwork, and stunning cornice work combine to give period properties a unique look.

However, keeping older houses in good condition means understanding the original construction materials and how those are integrated with the structural integrity of the property. Although building methods were sometimes questionable, many aspects of construction were designed to help keep homes ventilated and dry.

Breathable exterior paint was one of those design elements that have often been overlooked with the advent of modern plastic based paints. A true breathable paint is a vital requirement for old houses which tend to be constructed with solid walls rather than the modern cavity wall method.

In this guide, we’ll explain what breathable paint is, why it matters outside as much as inside, and which breathable exterior paints are the best for old houses.

What Is Breathable Paint and Why Does It Matter Outside?

A breathable paint allows water vapour to pass through the structure of the building. Without it, moisture gets trapped, damp builds up, and both the walls and the paint itself can suffer damage.

The performance of breathable paints is measured using an Sd value. The lower the Sd value, the more breathable the paint is, meaning moisture can pass through it more easily and escape the structure of the building. For old houses, an Sd value below 0.5 is recommended.

On exterior walls, breathability is vital. Old houses rarely have damp proof courses, and rely on porous stonework or breathable external renders (or both!) to regulate moisture. Many older homes have sadly seen issues with damp and structural damage after being renovated, with traditional finishes being replaced with non breathable cement based renders and plastic based paints. The result is trapped moisture which can lead to blown plaster, cracked render, peeling paint, or all of these issues.

That’s why breathable exterior paint is the best option for lime render, stone, brick, and heritage listed homes.

Choosing the Best Breathable Exterior Masonry Paint

Most big brand masonry paints on DIY store shelves are cheap for a reason: they’re loaded with solvents, plastics, and synthetic chemicals. They may look fine for a few years, and they might even claim they’re breathable on the packaging. 


If paints contain plastic binders they will always trap moisture. On lime plaster and solid walls, this leads to damp, peeling, and mould. The term “breathable” isn’t regulated, so don’t be misled by marketing.

True breathability comes from natural paints. These allow vapour to pass freely, keeping walls dry and protected while avoiding the long term problems caused by plastic coatings.

So what do we think the best breathable exterior masonry paints are? Here’s some of our top picks!

Graphenstone GCS Exterior 

For most old houses, Graphenstone GCS Exterior is a great choice. It’s suitable for lime render, brick, stone, concrete, and even previously painted walls. Reinforced with natural graphene fibres, it resists cracking and peeling better than most paints and provides excellent coverage with a smooth matt finish.

With around 65 colour options available, GCS Exterior combines heritage-friendly shades with modern durability. For strength, breathability, and ease of use, this is a great breathable masonry paint for exterior walls.

Auro 344 Lime Paint

Auro 344 is a traditional mineral paint made from aged slaked lime. It’s breathable, durable, and completely plastic free. Unlike plastic paints that claim to be “breathable”, this is genuinely vapour permeable, allowing moisture to escape and protecting lime plaster and solid walls from damp, mould, and peeling.

Suitable for both interiors and exteriors, Auro 344 creates a matt, slightly textured white finish with excellent coverage. Its natural alkalinity resists mould, while the VOC-free, eco-friendly formulation makes it safe for your home and better for the planet.

Check out our exterior grade masonry paints – many are suitable for indoor and outdoor use.

Breathable Paint for Exterior Woodwork – Is It Worthwhile?

Exterior woodwork including window frames, doors, and cladding, needs just as much care as walls. Wood naturally expands and contracts with the weather, and using a plastic paint can trap moisture, leading to peeling and rot.

Paints like Auro 517 are suitable for use on exterior wood and metal, and are fully breathable. I provides a flexible, semi-matt finish (around 10% sheen) that protects timber while allowing it to breathe. It’s tough enough for exterior use yet natural and eco-friendly.

Check out our range of exterior wood paint.

Exterior Paint Colours for Old Houses

Graphenstone GCS Exterior offers one of the broadest colour selections, with around 65 shades which are suitable for heritage homes. Off whites are consistently the most popular choice for period houses, especially in conservation areas.

If you’re unsure, always try a tester pot or swatch before buying. Natural pigments can look quite different in changing daylight.

Breathable Paint for Lime Render and Stone Walls

If your home has lime render or solid stone walls, breathable paint isn’t optional – it’s essential. Old walls regulate moisture naturally, and sealing them with plastic paint will only lead to damp problems later.

Graphenstone GCS Exterior is suitable for most types of render, whether lime, cement, or silicate. For a more traditional lime and mineral base, Graphenstone Ambient Pro is another excellent option, especially for heritage conservation projects.

By choosing breathable masonry paints, you’ll avoid the problems of peeling, blown plaster, and trapped damp that so often come with conventional coatings.

Why Natural Breathable Paints Are the Best Choice for Old Houses

Natural breathable paints are the modern version of the paints that were originally applied to period properties. They’re not only authentic, but they’ve got the properties your building needs to stay healthy and structurally sound.

Not only that, but natural paints are free from microplastics, don’t off gas toxic chemicals into your home, and are good for the planet. They’re often no more expensive than premium petrochemical based brands.

Whether you’re painting masonry, render, or woodwork true natural breathable masonry paints are the smart longterm choice for period properties.

Read more: What is breathable paint? | Low VOC vs VOC free paint

Next Steps – Grab a Free Colour Chart

If you’re planning to repaint your old house, the best place to start is with colour. Order a free paint chart or buy one of our colour swatches to see how shades look on your walls.

If you need specialist advice, contact us to chat about your project. Our highly knowledgeable team is here to help!