Common Exterior Paint Problems
When you are getting the exterior walls of your house painted, you should know that not all kinds of paints will last for long. There is a very good probability that any variety that you choose won’t even last as long as its expiry. There are several reasons why this is so. Below are a few common problems that indicate your house needs a repaint:
Chalking is one of the most common problems that occur. In this condition, a layer of the paint decomposes into powder. This is the normal way paint layers deteriorate. Increased erosion can result in heavy chalking. It also depends on the quality and type of paint used. If a low quality and highly pigmented paint is used then there are chances it may erode easily causing increased chalking.
House painters in Surrey, BC have, recommend using brushes with soft bristles to remove maximum chalk residue. Then, rinse the wall with the help of a garden hose or you can power wash it. Once it is dry, check if there is any chalk remaining. If there is, apply a layer of oil based or acrylic primer. If there is no chalk residue then you don’t need to apply a primer. In any case, use top quality exterior paint and never use interior paint on the outside walls.
There are several reasons due to which paint can become flakey or cracked. The most common reason is using low quality paints. These kinds of paints lack adhesion and flexibility. Another reason can be that the paint used was thin. It is very essential to prep your walls before applying paint; if they are not prepared properly it, can also result in flaking.
If the paint has not started chalking yet, you can minimize damage by scraping the loose and flaky paint, and sand the affected area. After that, use a primer and repaint the bare spots on the walls. In case any substrate is affected, remove all of the paint by scraping or sanding, or with a heat gun. But be very careful when using a heat gun as it can burn the paint too. In the end, apply a coat of primer and good quality exterior paint.
When the paint of the exterior walls starts to crack, it may look a lot like alligator scales; this is known as alligatoring. It is one of the most unattractive problems that can occur to the exterior walls. It is caused if the topcoat is applied while the undercoat is still wet. It is very essential to ensure that the undercoat has thoroughly dried before you apply the top coat. Another reason can be the constant contraction and expansion of oil based paints because of fluctuating weather conditions. Due to this, the paint layer loses its elasticity causing alligatoring.
House painters in Surrey, BC advise to scrape and sand the layer of paint until the layer is removed, you can use a heat gun to speed up the process. When the old paint is removed, apply a primer along with good quality latex or oil based paint.
These are some common exterior paint problems and their solutions.