All about exterior painting

All about exterior painting



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When the hot season sets in, come decoration wishes outside the walls of the house. Inspiration takes off and takes over the garden, the garage and the terrace. Doors, fences, walls, shutters ... you are spoiled for choice provided you opt for a paint adapted to the support that will withstand heat, weather and pollution.

Outside, what do I paint?

Outside the house, you can of course paint the facades (plaster, bricks, cement, concrete, etc.), but also shutters, gates, fences, generally made of wood or metal. You can also paint the roof in galvanized sheet metal or in tiles for example.

Equipment for painting outdoors

The essential tools: - A high pressure cleaner - A wire brush - A roller, a paint brush - A paint tray - A mask, gloves and possibly a coverall - A bonding undercoat - Tarpaulins or newspaper - Adhesive tape Tools to provide (optional): - A filling coating - A scraper - A paint spray gun - A telescopic handle for your roller - Sandpaper - White spirit

What precautions before applying the paint?

Before you start, choose the right time: the support you are working on should ideally be in the shade during your work. In the sun, your painted surface may crack or blister as it dries. Similarly, find out about the weather: avoid painting when there is a risk of rain or strong wind less than 24 hours after your creation. Make sure the surface to be painted is healthy and clean to allow a lasting adhesion. To do this, you must clean it by removing all dirt with a high-pressure cleaner. If you don't have one, a garden hose is fine. Another precaution, control the humidity: the presence of saltpetre, rust, mold or fungi is proof. Remove them by scrubbing with a wire brush. If your surface is cracked, it is imperative that you fill the holes before applying the paint using a filler or cement. For safety, let dry for several days. Do you notice that the area is still not smooth? Sand it to unify it. If it has already been painted, check that the previous layer of paint does not flake off. Use a scraper to remove loose paint before sanding. Finally before starting, also make sure that all the necessary tools are at hand. Insulate the floor from any risk of stains by installing plastic sheeting, newspapers or boxes at your feet. Apply adhesive tape to the edges of each part to be protected. To fix the paint, take the time for a first pass with a special undercoat; they exist for any type of surface: metals, plaster, wood…

What type of paint?

For outdoor use, acrylic paint is the most common. Resistant, it is an aqueous paint (less polluting than those based on solvent or oil and your tools are then cleaned with water). It can be used on all exterior supports except metal. There are many colors with different effects: smooth or plaster for example. More expensive, paints in solvent phase are also more resistant. Be careful to protect yourself during application with a mask and gloves and even a combination because this paint is also much more toxic. To clean your equipment, you then need white spirit. Its microporous texture allows the paint to breathe as well as the moisture to evaporate. In addition, it does not absorb water when it rains. It is suitable for all types of support: concrete, metal, wood, plaster. Finally, there are also special PVC paints to renovate your plastic outdoor furniture.

Natural exterior paint

Painting outdoors is not necessarily synonymous with the use of toxic products for health and the planet. There is a much more ecological solution than aqueous paints and paints in solvent phase. Lime paint is a mineral paint that resists mold, humidity, weathering, UV. It is suitable for untreated substrates such as cement, concrete, porous stones and bricks.

How to apply the paint?

Start at the top of the surface and work your way down. Paint in thin layers, making sure to remove the excess paint using a paint tray. Do not pass several times in the same place if the surface is not dry and avoid interrupting your work at the risk of seeing traces of paint appear. To paint a large area, use a roller. For corners that are difficult to access (grilles or louvers), a gun is very practical and quick. As long as you protect the whole environment around the area to be painted because the gun expels the paint without you having the possibility of aiming at a specific point. Plan more paint than with a conventional roller. Finally, for finishes, narrow corners and surface, prefer a brush that will allow you to weave everywhere. If it is necessary to provide an undercoat followed by a coat of paint, especially on the outside, be aware that applying too many coats can have undesirable effects: the paint then loses its flexibility and can s chipping.