Paint application


Some basic rules will help ensure good results for painting exteriors.


  • Paint tray
  • Clean, moist and dry rags
  • Ladder, stepladder, scaffolding
  • Rubber gloves
  • Goggles
  • Cap
  • Comfortable clothes
  • Extension handle
  • Sandpaper (120 to 320)  Masking tape
  • Electric sander
  • Sanding block
  • Shop vacuum cleaner
  • Container of water
  • Water or thinner (depending on paint)
  • Paintbrush
  • Roller
  • Compressed air gun

Some basic rules will help ensure good results for painting exteriors.

Before painting

  • Check the temperature outside. Ideally, it should be between 15 °C and 25 °C (60 °F and 77 °F). Make sure coating solvents will have at least 2 to 3 hours to evaporate before it is likely to rain or freeze or before dew will form, as such events could damage the appearance of the coating. In some cases the coating could whiten and the appearance could become patchy (flatter and glossier in spots). If using a water-based product for floors, wait at least 8 hours.
  • Avoid painting in direct sunlight. The following illustration shows the order in which to paint depending on the sun’s position. For example, paint surface 1 if the sun is in position 1, paint surface 2 if the sun is in position 2, and so forth.

  • Check surface temperatures. They should be the same as outside temperatures. If it is 30 °C or 35 °C (85 °F or 95 °F) outdoors, surface temperatures could reach 49 °C or 60 °C (120 °F or 140 °F). Check surface temperatures by placing a surface thermometer on the surfaces to be painted with masking tape. You should also not paint if moisture content of the wood is greater than 12%.
  • Select paint cans with the same batch numbers to make sure you are applying the same shades of colour, especially if you are using a premix colour, from start to finish. If batch numbers are different, mix paint from all the cans together.
  • If using a previously opened can of paint, check condition before mixing. If a skin has formed, remove with a knife. Stir with a stick, a paint paddle or a mechanical paint mixer. Properly stirred paint will have a consistent appearance in the can. The colour and appearance of poorly stirred paint will be uneven after it dries. Also check how long the paint will take to dry by applying a test patch to an out-of-the-way portion of the surface to be painted.
  • Check colour by applying the same number of coats you plan to apply on material of the same type you intend to paint. That way you will be sure to get the colour you want.

During painting:

  • Apply coating generously. Use the widest possible brush for speed but make sure it is no wider than the surface you are painting.
  • Paint along with the grain. Paint the six surfaces of the wood and saturate the edges of the boards in paint. This will keep the wood from soaking up too much moisture, which impairs adhesion of the coating.
  • Apply the recommended amount of coating. If the coat is too thin, it will provide inadequate protection. Too thick, and it will not form a solid film because the coating dries faster on the surface and more slowly below it.
  • Read the waiting time between the first and second coats. There are indeed significant differences between the products because some must be reapplied after 15 minutes, while for others you must wait 24 hours. If the temperature is low or humid, wait a little longer because the cold and humidity slow the drying of the coatings.
  • In addition to the waiting time between coats, read the other information on the label or the technical data sheet of your product. The drying time, the spreading rate and number of coats to be applied may vary from one coating to another.