Don’t forget to take precautions to protect yourself and your roof. We’ll guide you through everything you need to know about how to pressure wash a roof so you can tackle it with confidence. We’ll ask the experts for their top tips. You’ll want to ensure your pressure washer is suitable for the surface of your roof. Check out our guide to the best pressure washers (opens in new tab) that eliminate grime and allow you to fast-track your way to a cleaner home.
How to pressure wash a roof
So, why pressure wash your roof? Not only can pressure washing spruce up your roof, but it can also lengthen its lifespan. If left untreated, moss and algae can spread underneath your roof and cause damage. First, you want to check if your roof material is suitable. Concrete, ceramic, and metal roofs can withstand high pressure and are excellent candidates for pressure washing. If, however, you have an asphalt shingle or a wooden roof, you’ll need to exercise caution as these materials are more delicate. You may need to use a low setting or wash these surfaces with a hose to avoid damage and costly roof repairs. Check your pressure washer manual before you start. Think safety first. A ladder is a no-no with all that slippery water. Instead, use a wand attachment for those hard-to-reach spots. Don’t forget to wear eye goggles and sturdy boots to protect against flying debris. Allow the water to run for a minute to even out the pressure. Rinse the surface of your roof with low pressure (about 1200 PSI). For more brittle materials like asphalt shingle, opt for a fan nozzle, which is gentler than a concentrated jet. Next, apply a detergent to tackle tough grime. Finally, wash away the residue with your pressure washer and admire your handiwork. Discover more guides for the garden… Best chainsaws (opens in new tab) Best leaf blowers (opens in new tab) Best patio heaters (opens in new tab) Best inflatable hot tubs (opens in new tab)
