How to Paint the Outside of Your House

Step 1: Check the Weather

Choose a dry spell with temperatures between 10°C and 25°C. Avoid painting in direct strong sunlight as this causes the paint to dry too quickly and can lead to brush marks and poor adhesion. Ideally, work on an overcast but dry day. Check the forecast for at least 24 hours after painting to ensure no rain.

Step 2: Prepare the Surface

This is the most important step. Pressure wash the entire surface to remove dirt, algae, and loose paint. If you do not have a pressure washer, use a stiff brush and soapy water. Let the walls dry completely, which may take 2-3 days in summer.

Scrape off any flaking or peeling paint with a scraper. Fill cracks and holes with exterior filler, let it dry, and sand smooth. If the surface is powdery or chalky, apply a stabilising solution before painting.

Step 3: Protect Everything

Mask windows, doors, drainpipes, and any areas you do not want painted with masking tape. Lay dust sheets on the ground below your working area. Remove or cover light fittings, house numbers, and letterboxes.

Step 4: Apply Primer

If the walls are bare render, previously unpainted, or heavily repaired, apply a coat of masonry primer. This helps the topcoat adhere properly and gives a more even finish. One coat is usually sufficient.

Step 5: Paint

Use a long-pile masonry roller for large flat areas and a masonry brush for cutting in around windows and edges. Start at the top and work down. Apply two coats for the best finish, allowing 4-6 hours drying time between coats. One 10-litre tin typically covers 12-15 square metres per coat on textured render.

Step 6: Scaffolding Safety

For two-storey houses, scaffolding is strongly recommended over ladders. It is safer and allows you to work much more efficiently. Hire from a local scaffolding company and expect to pay £200-500 for a week. Always wear non-slip footwear and do not overreach from the scaffold.