You can typically complete all of these preparations for an entire house in a single day or over a weekend. If you're painting a porch or an outbuilding, it may only take an hour. If you're painting with latex, you can start the following day; solvent-base paint does not adhere well to moist surfaces so wait several days until all the washed surfaces are absolutely dry before applying this type of paint.
The best time of the year to paint your home is typically in late spring and early summer when it’s warm outside and moisture is low. This can change based on your geographic location. For example, fall can be a good time to paint in California when the difference between high and low temperatures is low. Your painter will select the optimal time to start your exterior painting project.