There’s no denying that as the weather turns wetter and colder, we look for added protection from the elements for our homes. Rain, wind, ice and the drop in temperature can all affect the exterior of a home; both aesthetically and in more serious ways if there isn’t adequate protection. Weakened walls or roofs can let in rain and damp, weakening the structure and making your home more uncomfortable if it’s cold and draughty.. Rather than investing in costly roof replacement or spending a fortune on heating bills; consider exterior wall and roof coating to help maintain the appearance and energy efficiency of your home. Read on to discover exactly what it is, how it works and the benefits it could bring to your household.
What is exterior wall coating?
Exterior wall coating is a specialist waterproof coating designed to stop moisture from penetrating the bricks that make up the outer walls, which then provides added protection from the elements to both the exterior and interior. One of the most popular choices is ProPERLA, a hydrophobic coating which repels water, to provide the highest level of protection possible. Coating for external walls can be clear – and suitable for use on brick, sandstone, concrete and stone – or a two coat coloured facade for use on mineral substrates that need a coloured exterior wall coating. Exterior wall coatings are self cleaning and super hydrophobic, but still breathable.
For added protection you might also consider waterproof roof coating; a similar product designed to protect tiles from prolonged exposure to frost, sunlight and moisture. The coating used is a unique, micro porous, water based membrane, which is both wind and water tight for superb protection from the elements.
How does it work?
Exterior wall coatings help to insulate buildings by reducing how much water is absorbed into the bricks or other mineral materials. The coatings form a super hydrophobic surface, which in basic terms simply means they are extremely difficult to get wet!
A material is classed as super hydrophobic if it causes water to form droplets or ‘beads’ – the surface repels the water which means it ‘sticks’ to itself instead and runs off the surface, making it very difficult to absorb moisture. Something becomes super hydrophobic if the contact angle of the water hitting the material exceeds 150 degrees, which allows droplets to bounce back like an elastic ball. This has also been named ‘the lotus effect’, named in honour of lotus flower leaves, which are also extremely super hydrophobic.
Each job will depend on the building, but a reputable wall coating company should follow roughly the same process below when preparing to coat your walls.
First, all external building repairs will be dealt with, including fixing cracks, re-rendering or repairing loose bricks, so that there’s a lovely smooth surface ready to be coated. If your house is already painted then the old, flaky paint is usually removed before repairs are made, even if the coating being applied is clear. Some companies will also pressure clean your walls to make sure the surface is clean and fresh. The coatings are then applied in one or two coats by a trained applicator with professional spray equipment to ensure an even covering. Depending on the temperature, the coating will be dry in around 6-8 hours and will then need a second coat if required.
The process to prepare a roof for coating is very similar; the roof will also be pressure cleaned to remove any lichen, moss, dirt or other buildup from the guttering like leaves and sticks. This will be bagged up and removed so the team have a clean surface on which to apply the coating. Like the walls, any professional agency should include a restoration surface; fixing or replacing any broken tiles and replacing any loose or cracked mortar. In some cases a fungicidal treatment is applied before the roof coating to kill off spores and prevent any algae or similar regrowing on your roof. Finally, the roof coating is applied using specialist airless spraying equipment to ensure all tiles are covered.
There are so many benefits to gain from investing in protective wall coatings or a roof sealant, see below for just a few of the reasons why.
Wall coatings are designed to withstand even the harshest of weather conditions, and can protect your home from rain, wind, frost and snow – perfect for those living in the north of England or Scotland where the weather can be extreme during winter. As mentioned above, the application process also involves making any existing repairs that are needed, sealing any weak spots in your walls and ensuring your home is protected from the elements for years to come. Most coatings are able to penetrate up to 17mm deep into the brick or wall material, keeping damp out on a surface level but also preventing penetrative damp from seeping into the walls.
Tests have shown that a damp content of just 5% in a plain brick wall can lower insulation performance by up to 50%, so maintaining dry walls can make all the difference to how much heat remains inside your home. A damp wall acts as a ‘bridge’, enabling heat to transfer from the inside out twice as quickly, however some leading wall coating products can reduce water absorption by more than 95%, resulting in less heat loss.
External wall coatings can completely transform the exterior appearance of your house, even if you choose a clear option. The pre-treatment involved means that your brickwork will be cleaned and repaired, and some wall coatings are available in a range of colours to compliment your existing decor. The super hydrophobic material also repels water and dirt, so the walls are effectively self cleaning, as well as resistant to UV rays. All the above ensures that the facade of the building will remain clean and be slower to display age or general signs of wear and tear.
As discussed, the insulation benefits of wall or roof coating can lead to a reduction in heating bills – if less heat escapes then there’s no need to have the central heating on for as long or turned up as high. Waterproof roof coating is also a fantastic preventative measure; it could extend the lifespan of your roof by years, and is great value for money compared to the costly task of retiling your roof.
Adds value to your home
Even if you’re not planning on moving anytime soon, the 10 year guarantee on wall and roof coatings can add value to your home if you decide to sell in a few years. Waterproof roof coating extends the life of your tiles and ensures quality for added kerb appeal, whereas exterior wall coating can make your property look like new. The added protection and security that comes with exterior coating is very attractive to potential buyers, not to mention the money they’ll save on heating bills.
As mentioned above, exterior wall coatings also prevent penetrative damp, while still allowing the walls to breathe. This means that air and moisture can still escape out, and won’t become trapped allowing a build up of condensation or mildew. This clever technology allows your house to stay warm and dry without becoming stuffy. It also helps regulate the temperature so you stay cosy in winter but cool during the warmer months.
Resistant to mildew and other pollutants
The super hydrophobic surface makes it difficult for moss, lichen or algae to grow on the walls or roof of your property. This keeps the building looking presentable and attractive, as well as reducing the likelihood of structural damage or damp caused by adverse weather conditions.
If you want the best in energy efficient wall and roof coatings, Kingdom Coatings has you covered. Based in Scotland, we’ve developed our methods to protect your home against the very best and worst of the Scottish climate; from boiling hot summers to the harshest winter conditions. All of our coatings come with a 10 year guarantee for added peace of mind, so visit our website today to request a free quote and see how our friendly and professional team could help enhance your property today.