In the event that the damage caused by water only causes a stain, without affecting the integrity of the plaster, there is no problem in priming the stained area with a stain blocker, such as a Kilz sealant, and then painting. Professionals recommend using a high-quality latex paint on plaster. As stated above, you should not paint on roofs damaged by water. You have to dry it and fix it first before proceeding to paint on it.
Otherwise, painting over it would be counterproductive. Do your walls get soaked every time it rains? Are unsightly water stains building up? If so, you might be wondering if you can paint on them. Water damage comes from a surprising number of sources and the exact location of a leak can sometimes be difficult to identify. You can use latex paint for a water-damaged ceiling, since they are inexpensive and durable, as far as paints on the ceiling are concerned.
Before painting over a water-damaged ceiling, it's always a good idea to identify and address the underlying cause of water damage. As with the plaster ceiling, you need to determine the root cause of water damage in order to be able to paint on it. If the damaged piece of plaster is just a water stain and there are no underlying leaks that repeat, use a stain-blocking primer, such as a Kilz sealer. Another reason why you should repair damaged plaster before painting over that damaged area has to do with the paint itself.
Obviously, the water will keep coming in until the leak is fixed and you don't want the water to spoil a new paint job. The first step in addressing the cause of water damage is to stabilize the area surrounding the leak. If you have water damage to the roof, you have probably wondered if painting over the problem area is a practical solution. Using a bucket of clean water and a sponge, wash the surrounding area as a final cleaning exercise, and then let the water-damaged plaster wall dry completely.
For example, if the damage is caused by a slow leak or a broken pipe behind the drywall, you are likely to suffer ongoing damage until you repair the cause of the leak. If your home has recently suffered water damage, Williams Professional Painting will be happy to help you get everything back in order. If you have water on the floor, you can use a water vacuum or a shop vacuum for faster and more efficient removal. If you have water damage and are looking for a paint company to repaint your wall or ceiling, Southington Painting Company will be happy to help.
Latex is fine for a topcoat over the primer, but it can bubble if applied directly to the previous water damage. If the damage to your wall is excessive, call someone who knows how to repair plaster walls damaged by water.