How to Paint Outside Walls

Secure scaffolding and ladders; ensure all safety precautions are in place. Protect nearby flowerbeds and lawns with drop cloths and move vehicles to a safe distance. Always wear a protective mask when sanding paint.

Prepare the surface according to its construction. Sand flaking paint on wood with an electric sander; use a wire brush on brick or stone. Clean the walls thoroughly with mild detergent and water. You can use a pressure washer, but be sure you follow the manufacturer's directions as they can damage surfaces.

Make any necessary repairs. Remove protruding nails. Fill holes and cracks with the appropriate filler. Re-point bricks if the mortar is loose in the joints. Pay attention to window frames; replace dry or missing putty. If you are repainting the frames, complete this job before starting on the walls.

Secure your paint bucket to the scaffold or ladder. Never try to hold a paint can, bucket or roller pan while painting outside walls. Apply primer to the walls. They may require more than one coat. Primer seals the surface and provides adhesion for the top coats. Work from the top of the building downward. If you are right-handed, start on the right side of the wall. If left-handed, begin on the left.

Cut in around windows and other features with a small brush as you go. Apply undercoat and top coat with brush or roller, working downward as described in Step 4. On refilling your brush or roller with paint, always start on an unpainted area and work back into the previously painted area. This will prevent hard lines appearing. Keep the leading edge wet for the same reason. Don't stop painting in the middle of a section of wall; if you need to take a break, complete the wall first, if possible. At least two applications of top coat will be required.