How to Paint Slate Roofing

Select the color of paint that you are going to use on the roof. Use this paint color to select the primer that you need. Choose a light gray or white primer if you are going to use a light or bright color, or choose a dark gray primer if you are going to use dark or dull colors.

Climb to the roof and use the pressure washer to clean the roof tiles. Start at the peak of the roof and spray downwards to clean. Try to avoid spraying the high-pressure water upwards, as this will force water underneath the tiles.

Allow the cleaned tiles to dry for 1 to 2 days to ensure that they have dried completely.

Open the can of primer and mix thoroughly. Once on the roof, pour some of the primer into the paint tray. Cover your brush or roller and begin to paint from the peak of the rook. Be certain to paint the edges of each tile on the end and sides. Ensure that you do not paint between yourself and the ladder so that you can get off of the roof. Continue to apply the primer until the entire roof is covered. Allow time for the primer to dry -- most commercial primers dry in 24 hours.

Mix the exterior paint. Follow the same process that you used to apply the primer.