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Roof Painting – Is It A Good Idea?

Painting a roof a roof coating

Maintaining the integrity of your home is one of the most important aspects of being a homeowner and can be one of the most stressful. We all want to keep our home protected, by how do you do this, and especially without breaking the bank.

This is where roof paints & coatings come in, as one of the many products that are designed to improve your home. But are they a good idea? Our team of experts have put together this guide in order to give you all the information you need, so you can decide whether are not they are for you.

What is a roof paint or coating?

Firstly let's establish what exactly a roof paint, also known as a roof coating is. These are specially designed treatments for roof tiles that aim to enhance the beauty of the roof tiles, while providing added protection from the tough weathering that they endure.

These paints & coatings, as with any product, come with varying technology and quality, which is where confusion is often caused.

Why would you use a roof paint or coating?

When it comes to painting a roof, the basis premise is to create a water impermeable barrier on roof tiles to prevent moisture from damaging the roof, and to provide a beautiful, like-new finish to the roof that can give a huge boost to the property's curb appeal..

You may be thinking, surely roof tiles are waterproof already? Well, this is not always the case, as roof tiles are porous, meaning they absorb small quantities of water. This water can cause a number of issues;

  • When a roof is left untreated, moisture can find its way into any gaps between roof tiles, which when it freezes expands, causing hairline cracks in the roof tiles to grow larger.
  • High moisture conditions are perfect for moss to grow, which lifts roof tiles away from each other when it grows, increasing the likelihood of damage.
  • UV degradation can cause discolouration of the roof tiles

These are all key reasons why preventing moisture from entering roof tiles can significantly enhance the longevity of roof tiles, helping to maintain your property's integrity.


Are roof paints & coatings damaging?

As with any waterproof treatment for properties, the ability for a waterproof roof coating to breathe is paramount to its ability to protect a property. If a building material such as roof tiles are sealed completely, meaning water cannot enter or escape, moisture from inside the property will build up, both causing significant damp and damage to the material.

This is why a waterproof treatment must be breathable, allowing moisture to breathe through the coating. To be breathable, a waterproof treatment must have an SD rating of below 1. If a roof paint or coating does not have this, then you must avoid these completely!

If a waterproof roof paint or coating remains breathable, it will prevent water from soaking into the roof tile, while ensuring that moisture can escape and keep the roof tile dry.

Do roof paints & coatings insulate homes?

We often get asked whether roof coatings help to insulate homes. The truth is, although dry building materials transfer heat slower than wet materials, which is why wall coatings can save energy, roof coatings do not work in the same way.

Roof tiles are designed to allow air to flow freely through the roof and there is no evidence to suggest painting a roof could improve your home's thermal efficiency. Roof paints & coatings are designed to protect roof tiles and to enhance their beauty, not to serve as an energy saving measure.

The reason wall coatings can insulate a home is that they prevent moisture from creating a thermal bridge that allows heat to quickly pass out of a property. Roof tiles are only thin, and therefore do not form an insulating barrier, whether painted or not. This is why spray foam insulation is used on roofs to prevent energy loss.

Do roof paints & coatings insulate homes?

We often get asked whether roof coatings help to insulate homes. The truth is, although dry building materials transfer heat slower than wet materials, which is why wall coatings can save energy, roof coatings cannot!

Roof tiles are designed to allow air to flow freely through the roof space and there is no evidence to suggest painting a roof could improve your home's thermal efficiency. Roof paints & coatings are designed to protect roof tiles and to enhance their beauty, not to serve as an energy saving measure.

What is the best roof paint or coating?

Here at ProPERLA, we offer a range of super hydrophobic coatings and treatments for a range of surfaces, including roofs, exterior walls, wood & paving. 

Our super hydrophobic is the most advanced waterproofing technology in the UK, as it completely repels water while maintaining complete breathability.

This ensures that while moisture can freely escape a property, our roof treatments prevent moisture from causing damage to roof tiles, causing growth of moss & algae and helps to extend the lifespan of roof tiles.

We offer two roof treatments, a coloured roof coating and a clear water repellent, which both contain our super hydrophobic technology, but either allow you to maintain the natural beauty of your roof tiles, or transform the roof in a new, modern colour that will completely change your home for the better,

Another key advantage of our roof treatments is that they are self-cleaning. Yes, self-cleaning, as due to water being repelled off the roof tiles once treated, any dirt or grime cannot attach to the roof tiles. This means that your roof tiles stay looking pristine new for years to come, dirt and moss free.

Both of our roof treatments come with a 10 year manufacturers guarantee, that ensures they will perform for years to come without changing in appearance or reducing in waterproofing ability.

RENOTEC Roof coating
 

The ultimate waterproof paint for roofs

  • Available in a range of popular exterior colours
  • Super hydrophobic
  • Highly breathable
  • Self-cleaning
  • Discourages moss, algae & lichens
  • Helps to extend the lifespan of the roof tiles
  • 10 year manufacturer's guarantee
Renotec Roof Coating
ProPERLA water repellent
 

The ultimate clear roof waterproofer

  • Creates an invisible protective barrier
  • Super hydrophobic
  • Highly breathable
  • Self-cleaning
  • Discourages moss, algae & lichens
  • Helps to extend the lifespan of the roof tiles
  • 10 year manufacturer's guarantee
Water Repellent
Moss on roof

Before

moss on roof tiles

Before

moss removed

After

moss on roof tiles removed

After

What roof coating colours are available?

RENOTEC is available in seven popular colours that are designed to match any property. Our Red Brown & Rustic shades are two of our most popular colours, as they provide a beautifully traditional look to any property. For something more modern, Anthracite & Black Blue also prove extremely popular. These shades work perfectly with white rendered properties, and can really provide a huge kerb appeal. 

Renotec Roof Colours


How to paint a roof

We do not advise that you attempt to paint your roof using a waterproofing treatment as there are countless things that can go wrong, and if done incorrectly can be a disaster.

We have a number of Approved Installers who have completed our ProPERLA training course, that ensures they can expertly apply our roof treatments treatments to your home. Please see our Approved Installers page to find an installer in your area who can assess your property and provide a quotation.

We hope this guide has answered any questions you may have had regarding moss & how to prevent it!

No matter whether you are a homeowner or a roof coating company. We are on hand to assist you with any question you may have.

Want to speak to one of our technical advisers for further advice on our range of roof paints & coatings? They are always on hand to answer any questions you may have. Send them an email - info@properla.co.uk
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