Common Reasons Why Your Painting Project Is FailingCommon Reasons Why Your Painting Project Is Failing

Problems with good paint are experienced with one out of every one hundred painting projects. Out of the one percent of substandard painting jobs, about 20 percent can be traced to causes such as a poor choice of paint products for a specific purpose, excessive or thinning of the paint that isn't required or poor workmanship in the application of the coating. The remaining 80 percent, of the unsatisfactory painting jobs are likely caused by trapped moisture. This moisture can come from either outside or inside the building structure. Each source aggravates the other. Moisture in the form of water vapour is the root cause of 80% of paint failure.

There are many different instances where paint failure is present. Peeling paint on siding may be caused when water coming up the nail line on the studs. Contact with the wet, green lawn below is where this water comes from. If stained areas are detected between the studs, you will know that the condensed water has had a chance to drain itself out. Construction that doesn't allow for any breathability will have a higher chance of paint failure. By having the studs and siding a few inches above ground, peeling paint, blistering and staining can be avoided.

Water can penetrate into a wall from the inside as well as from the outside. Painting failure on kitchen and bathroom walls and ceilings can be caused by high humidity due to cooking, washing and showering. Installing a ceiling fan or a suction-type window fan that suits the size of the room will elevate most this problem. Another option is leaving the window open during and for 30 minutes after any of these activities.

Faulty plumbing is another cause of paint failure, usually with interior painting projects. To fix this type of problem, the leak must be located and fixed, and then the drywall should be repaired and primed with a stain blocking primer where any water stains have occurred before repainting.

Insulation in a wall is designed to keep warm inner walls warmer and the cooler outer walls cooler. Consequently, some insulation favours the dew point in the cold outer walls by allowing water to condense sooner than it might if such insulation weren't present. When insulation is installed correctly for its primary purpose, to conserve heat, more provisions should be taken to avoid the chilling of too much water vapour. The space in the room and in the wall should both be ventilated with cooler, drier air that will remove excess moisture as the air begins to warm up. A healthy humidity can be retained within the warm living area by installing a vapour barrier.

A vapour barrier is any material that successfully retards moisture vapour from passing through the stud space into the outer wall. A roll of black asphalt or other kinds of impregnated papers can be installed by tacking to the studding before the drywall is installed. This kind of vapour barrier forms part of the improved batt type of insulation. It is not recommended to use sheathing paper as it will allow the water vapour to escape outwards. There is also a paint that acts as a vapour barrier which is a great way to protect your walls against paint blistering due to excessive moisture. These special types of paints are applied as a primer before painting your walls.

Paint failures can be avoided on your next painting project by the proper "know-how" on the part of home owners, professional painters and painting contractors.
by Mike Ponych
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