Choosing A Masonry Paint For Older Heritage Home

If you own an older heritage home, you’ve probably heard that limewash is the only suitable masonry paint option to use, as traditional buildings need to breathe. While breathability is essential in older properties, modern paint technology means that limewash isn’t always the only suitable choice.

In this blog, we will cover:

• Why do older heritage homes need to breathe?
• Limewash isn’t the only breathable option
• What does breathability mean?
• Limewash vs Emperor Masonry Paint

Why do older heritage homes need to breathe?

Many older properties were built using materials such as solid brick, natural stone and lime render, which naturally absorb moisture when it rains and release it again as it dries.

Unlike many modern homes, they often don’t have cavity walls to stop moisture from moving through the building. If a masonry paint traps moisture inside the wall instead of allowing it to escape, this can lead to issues, such as damp, peeling paint and structural damage.

Limewash isn’t the only breathable option

Limewash has been used on historic buildings for centuries due to its excellent breathability and ability to allow water vapour to pass through traditional walls.

However, advancements in paint technology mean that limewash is no longer the only breathable option available for older heritage homes. Modern breathable masonry paints, such as Emperor Masonry Paint, have been developed to provide a similar level of breathability while offering additional protection that traditional limewash cannot.

By combining modern technology with the requirements of older buildings, these paints can help maintain the movement of water vapour through the walls while also providing enhanced protection against rainwater absorption. Features such as super hydrophobic technology, self-cleaning properties and a longer-lasting finish help protect heritage properties from the effects of weathering, reducing maintenance while preserving the character of the building.

What does breathability mean?

Breathability describes how easily water vapour can pass through a building material.

Materials like brick, stone and render contain microscopic pathways, otherwise known as pores, that allow air and vapour to move freely through them and ensure moisture is regulated.

The breathability of a paint is measured using its SD value, which shows how easily water vapour can pass through. The lower the SD value, the higher the breathability is.

Comparing SD values is one of the best ways to assess whether a masonry paint is suitable for an older property.

Frequently asked questions

Is Emperor Masonry Paint Suitable for Older Homes?

Yes, for many older and period properties, Emperor Masonry Paint is a suitable choice when a breathable, long-lasting exterior paint is required. It’s ideal for homeowners who want to retain the breathability of their walls while upgrading from traditional masonry paints that require more frequent maintenance.

Can you paint over existing limewash with Emperor Masonry Paint?

Yes, Emperor Masonry Paint can be applied over existing limewash, provided the surface is sound and properly prepared. Before painting, any loose, peeling or flaking limewash should be removed to create a stable surface and ensure the paint adheres correctly.

What are some disadvantages of limewash?

It typically requires multiple coats to achieve an even finish and needs more frequent reapplication as it gradually weathers over time. Compared to Emperor Masonry Paint, limewash also offers less resistance to heavy rain and has a more limited range of colours.

If you have more questions, we are here to help with our in-house team of experts. You can chat to them by emailing [email protected] or give them a call on 01254 936121.

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Thinking about a project? Start yours by ordering your sample and see how Emperor Masonry Paint performs on your home.

This article was written by the Emperor Technical Team, a group of experts with an average of over 25 years experience in the building industry. They work daily with homeowners, tradespeople and specification professionals to deliver practical, expert guidance that promotes long-term results, supports wall health and helps create homes that are prepared for the future.