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learn about how temperature and humidity can ruin a paint job

Published in: Self Improvement
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  1. 1. There are more weather conditions to consider when starting a painting project than whether or not it’s going to rain. Even a clear day might not be a good day to paint if the temperature and humidity aren’t right. These are some of the ways temperature and humidity can affect a fresh coat of paint. Keep them in mind when planning your next painting project. TEMPERATURE & HUMIDITY VS. PAINT HUMIDITY ►► Painting in high-humidity environments can create multiple issues, including increasing drying time by introducing more moisture into the paint. ►► Humid conditions also hurt the adhesion of paint to wood surfaces because the moisture can be absorbed into the wood, causing bubbling or peeling. ►► In some cases, humidity can cause surfactant leaching, which results in a white or brown discoloration on the paint’s surface. ►► When high humidity is combined with low temperatures, condensation can occur on the paint’s surface, which creates more difficulties in terms of the paint’s drying and adhesion, compromising its protective qualities. TEMPERATURE ►► Temperatures on either extreme can have wildly different effects on how fresh paint dries. Always check the weather forecast before beginning any painting project so you know what to expect. ►► Extreme cold can prevent paint from drying properly because moisture inside the paint can freeze before it cures completely. ►► Make sure the temperature will be at least 45 degrees Fahrenheit for at least 48 hours if you are using oil-based paints, or at least 50 degrees Fahrenheit for latex and acrylic paints. Some paints are formulated for lower temperatures, however, so check with the manufacturer. ►► Time your work for when temperatures are expected to remain at a suitable level for at least two or three hours after application. ►► Extreme heat can cause problems with drying paint by evaporating moisture in the paint too quickly. This can cause the top layer of paint to skin over before the layers underneath dry sufficiently. It also can produce blisters, cracking and other imperfections.