Choose the Best Exterior Paint: Type, Sheen, and More

Just like interior paint, exterior paint is divided into 2 types: water-based (latex/acrylic) and oil-based (solvent/alkyd). In general, water-based paints are more user-friendly than their solvent-based counterparts. However, solvent-based paint does have its benefits for certain applications. Let’s compare: 

Recommended primer. Oil-based primers often provide better adhesion to the surface. However, a water-based primer means you will not be restricted in terms of paint choice. 

Recommended paint. For vinyl siding, we recommend water-based paint in a satin finish. For hardboard or aluminum, both types work. Finally, for steel siding, use a rust-inhibiting water- or oil-based paint. Either option will require 2 coats. 

Other considerations. Vinyl, steel, aluminum, or hardboard siding can all be repainted. 

Application. 

Vinyl siding:

1. Sand all surfaces.
2. Wash the siding with a concentrated solution of trisodium phosphate.
3. Apply 2 coats of paint.

Other types of siding:

1. Scrape away any peeling paint.
2. Sand to smooth out.
3. Metal surfaces: Apply an anti-rust primer.
4. Apply 2 coats of paint.

1. Ensure plastic is clean.
2. Paint in a well-ventilated area in temperatures between 10–25°C.
3. Apply several light coats for the most even coverage. Drying time is quick, so plan accordingly.

The surface must be contaminant-free and dry. 

Before beginning a painting project, it is important to first prepare the surface to allow the new paint to adhere to the surface evenly and properly:

1. Remove dirt with trisodium phosphate (TSP).
2. Remove mould with a chlorine-based cleaner.
3. Remove old paint with a scraper and sandpaper. (If you get down to raw wood, be sure to apply primer before painting.)

Make sure to use primer. 

Primer plays a critical role in painting.

• Protect both the paint and the wood by first applying a primer.
• The primer will give the paint a smooth and even surface to adhere to, creating a watertight seal between the wood and the paint.
• Sometimes dry wood can suck the paint in, creating an uneven or splotchy paint application.
• By priming the wood first, you won’t have as many coats of paint to apply, saving you both money and time.

Don’t let the elements interfere with your painting project. 

Wind

• Can blow debris onto your wet paint.
• Can cause the paint to dry too quickly, resulting in marks.

Temperature and Moisture

• Colder temperatures (below 10°C) may prevent paint from drying.
• Humidity and rain can prevent paint from drying properly.
• Check paint label for recommended temperature ranges.

Sunlight

• Direct sunlight can make it difficult to see what areas have been painted during application.
• Can cause the paint to dry too quickly, resulting in marks.

Paint large surfaces first. 

Paint from top to bottom. 

If you are painting a house, follow this plan:

1. Cornices
2. Sidings (from top to bottom)
3. Windows and doors
4. Balconies and patios
5. Shutters, storm windows, and removable screens can be saved for painting in the garage on a rainy day.