It's important to understand how painting in cold weather can affect paint application, namely how it can change the drying pattern, characteristics and performance of the paint. Cold temperatures affect painting because alkyd and oil paints are based on natural oils and resins that at low temperatures become more viscous (they get thicker). So, when painting in cold weather, some paints will become very thick, therefore requiring thinners. Water-based paints are affected mostly by the slower evaporation rate of the water. Paint may begin to clump and even freeze in the can when the temperature falls too low. For ease of application, it is a good idea to submerge your cans of paint partly in warm water.
Most alkyd and water-based paints won't cure properly unless the temperature remains above 10oC (depending on the manufacturer this temperature could be even higher), resulting in a coat that will be susceptible to cracking, fading and chalking much sooner than expected. Lower temperature paints, however, are designed specifically to survive the rigors of winter weather, allowing you to paint all year round. Paint dries more slowly in cold temperatures, and until the coat is fully cured the temperature must remain above the minimum advised by the manufacturer. View IR Heaters to Quicken Drying Times
Cold weather will slow drying time and will extend your re-coat times. Re-coat time at 23oC, using water-based paints, requires a period of approx. 4 hours. If the temperature drops to 10oC, then the re-coat time will be extended to approx. 6 hours. Painting in cold weather using alkyd paints will require even more time, in some instances more than 48 hours before re-coating. It is important to note that the surface temperature can differ between various areas on the same structure, causing drying times to likewise vary.
Painting in Cold weather may prove more difficult, but with the right tools, there's no need to accept an inferior paint job. Follow this link to view a full range of heaters.
Why not get some help from our business specialists at Ultrimax who can advise on Painting in Cold Weather Conditions.
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