Repainting a roof is a good way to give it a makeover, as long as the cover is sound, in good condition, and non-porous. In other words, repainting a damaged roof will not save you from making repairs and cleaning / defoaming beforehand.
The roof paint will restore your tile a stunt, and if you choose a waterproof painter, strengthen the protection of your roof covering. But don't rely on paint to “plug” infiltrations and hide mould, that's not its function.
Let's find out here what you need to know about roof painting.
There are paints for slate, paint tiles,
paint for zinc, the water-repellent paints, fungicides paints, UV paints, coloured, of colourless varnish roof ... Most roof paintings are waterproofing or water repellent: they allow water to run off your blanket faster.
You will not be able to repaint your roof with any exterior paint: you must choose a paint suitable for your roof covering. They will adhere perfectly to the support and protect your materials.
Roof Paints And Their Use
Here are the main categories of roof paint :
The clearcoat roof: to improve the hydrophobic qualities of a roof without changing its appearance. To be applied in a single coat.
The acrylic roof: highly resistant to external conditions, limits water penetrations and renovates.
The resin roofing polyurethane: essentially for terraces and flat roofs, limits the penetration of water.
Just as cleaning, defoaming and treating your roof is essential; applying a water repellent treatment is often a good idea. There are water repellent paints, but we believe it is better and more effective to apply a water repellent treatment first, then a roof paint. Certain paints can also help reinforce the thermal insulation of your roof by reflecting the sun's rays and helping to protect the attic from strong heat. Once again, be careful: a paint will never replace insulation or a screen under the roof!
Beware Of Cheap Paints
Be careful; do not be seduced by “low cost” paints: although they are waterproof, roof paints must imperatively be microporous. They protect while allowing the support they cover to breathe. Inexpensive paints won't and will tend to smother your material and create moisture and mould problems in your frame. Compare the rates of roofers near you.
The rainfall, sun and weather damage and pollution, weaken or wither cover your roof.
This can cause porosity, foam and leakage problems. Against which you will first have to carry out roof renovation work. But roof paint can help your roof guard or delay specific problems and ensure the longevity of your roof.
Paint For Metal Roofs
Corrosion that attacks metal roofs can be fatal to your roof. If the roof is rusty, applying two to three coats of metal roof paint is recommended. After sandblasting and degreasing with acetone, it will provide your roof with lasting protection.
The paint for metal roof suit the cladding organic coated, aluminium and galvanized steel. This type of roofing may require the prior application of an anti-corrosion primer coat before receiving the final coat of paint.
Solar Reflective Roof Paint
Reflective roof paint is resin-based, available in several colours, although white is more effective. These paints also have the advantage of being waterproof, mould resistant and durable.
They also have significant qualities in terms of thermal insulation. Thanks to its properties, this roof paint can reflect the heat of the sun. This makes it possible to maintain a pleasant temperature inside the building.
Acrylic Roof Paint
It is the most used, made from acrylic resin. Easy to mix and clean with water. Once applied to the roof, it hardens quickly on contact with the open air.
This paint also offers an excellent level of adhesiveness with various materials (wood, plaster, plastic, etc.). You can therefore use it, as well, to paint a roof as the walls of the house. Also, it is odourless and offers a wide choice of colours.
Paint For Flat Roofs
It is composed of a solvent mixed with polyurethane resin and oil. The level of toxicity of this paint requires special precautions. It takes a while to dry.
Paint For Steel Or Concrete Roofs
A resin-based paint is generally well suited for painting a metal or fibre cement or concrete roof. This paint is anti-mould. Also, it is resistant to sunlight and bad weather.
- It can be used on roofing materials such as concrete tile, clay tile, fibre cement or steel roofing. It can also be used on metal roofs after the use of a suitable primer.
This resin-based paint comes in a wide variety of colours. It is advisable to apply an anti-corrosion coating first. This helps to strengthen the waterproofing of the colour.
Tile Roof Paint
To paint a tiled roof, you can use a ready-to-use product. The paint chosen must be of good quality, opaque and weather-resistant.
Slate Roof Paint
Painting a slate roof restores shine to an old top to refresh it. Slates are daily subjected to cold, snow, hail, frost, rain, thunderstorms or other precipitation. They are also subjected to the sun, high heat and intensive ultraviolet rays. These bad weather conditions strongly weaken the roof covering
This fact can lead to a loss of waterproofing, leaks from the roof and ultimately water infiltration problems. It is, therefore, better to ensure that the roof is well maintained to avoid costly renovation or repair work.
To prepare a slate roof before painting:
- Prepare the support: make sure that the non-adherent particles are all removed from the surface to be painted. This step is important if you want to find good adhesion of the paint on the slate roof.
- Remove the foams: manually brush all loose material. Apply a defoamer. Spray to saturation to fully impregnate all the foams
- Clean with water
- Leave to dry for at least 24 hours.
- Mix the paint
- Apply the paint: it is recommended to work as uniformly as possible
- Let dry