Two important reasons for repainting a home is the desire to beautify and preserve the property. Between the added curb appeal and the extended surface life of the substrate, the value of painting your home pays off in many ways over a long span of time when done correctly. Doing so also keeps up the value, protects against moisture infiltration, and even helps to deter pests.
However, there is another factor that is a really big deal when we are considering the right time to paint our home, mold and mildew. Unfortunately, simply repainting a home with mold on it will not eliminate it. Before any new coating can be applied, the surfaces must be cleaned thoroughly, whether the mold and mildew is visible or not. Attempting to paint over it without removing it first will lead to many problems down the road. It can prevent the paint from bonding and will grow through the new paint, which will shorten the life of the latest paint application significantly.
Since mold is a parasitic fungus, its web-like body can eat through and into porous painted surfaces. Because mildew destroys the integrity of the paint film, moisture can enter the painted surface causing masonry to crumble and wood to rot.
Aside from its unsightly appearance, mold and mildew can make it impossible for paint to adhere properly. As you read in the beginning of this text, to achieve a smooth, even paint finish, the surface must be clean, dry and free of mildew. If even a small amount of mildew is left behind, it can grow underneath the paint and cause it to chip or peel. It is always better to call professionals for mold inspection and remediation to be safe and sound.
Use mildew resistant paint
Once the mildew is gone, you can paint the area. To prevent a recurrence, you may want to select paint with a mildew inhibitor. Mildew inhibitors such as the biocide, barium, and borate prevent the growth of new fungus. They are commonly found in popular brands of exterior paint, such as Sherwin Williams Duration. Each situation is different, so be sure to ask the your painter of the rep at your paint provider for the specifics on which paint is best to suit your needs.