Best Temperature To Paint Exterior Siding

Optimal relative humidity rh levels for exterior painting tend to be in the 40 to 50 percent range.

Best temperature to paint exterior siding. For an oil based paint the best temperature to apply is between 40 and 90 degrees fahrenheit. The best drying will occur when the relative humidity is 40 to 70. Cover plantings air conditioner s and exhaust vents with drop cloths. For latex based paints it s 50 to 85 degrees.

Tie back shrubs and tree limbs. Some humidity is desirable to perfectly calibrate the drying rate. Painting during hot weather can cause latex paint to dry too fast resulting in brush marks and clumps of paint on the paintbrush. The maximum and minimum recommended temperatures for exterior paint vary depending on the type oil or latex and specific brand of paint used but a general rule of thumb is that oil based paint can be applied when the temperatures are between 40 90 f and latex between 50 85 f.

Ideal temperatures the ideal time to paint your house is when you have a day with low to moderate humidity no wind and temperatures ranging between 60 and 85 degrees fahrenheit. Painting when it s too cold can cause the paint to not adhere well to the surface resulting in cracking and peeling. That s mainly for exterior painting. Prep before you paint.

As for humidity levels the best drying will occur between 40 and 70 percent humidity. As an extreme example a dark surface painted in direct sunlight will cure so fast that brush marks remain in place and uneven glossiness called paint flashing will occur. The best temperature range for painting outdoors with latex paint is from 50 to 85 f.