Although interior and exterior paint may look the same, exterior paints have traits and chemical properties that are very different. For example, exterior paint needs to be flexible enough to withstand the strain of a shifting home, as well as expanding and contracting due to temperature change. To compensate for the ever changing conditions of a house’s outer surface, exterior paints contain pigment binding resins that are more flexible. Exterior paints also contain other additives that help to prevent fading, stop mildew, and resist tannin bleed. The flexibility of exterior paint, however, tends to make the paint softer and more prone to scuffing.
Interior paints, on the other hand, are less flexible and formulated with additives that make them easier to clean, scuff/stain-resistant and with good hiding ability. The inside of your home also experiences much less flexion than the outside, so interior paints can be lighter and more rigid when dry. Because people are directly exposed to interior paint on a daily basis, they contain less VOCs (volatile organic compounds) and have a lot less odor than exterior paints. Keeping all of these details in mind, it is very important to use the right type of paint in the right areas inside and outside your home.
If you have any questions regarding interior and exterior paint, please contact MTS Painting for further assistance.