Pressure Wash Flat Roof

Use low pressure to spray it clean.

Pressure wash flat roof.

This environmentally friendly method has become increasingly popular as no chemicals are required. By comparison a fire hose sprays at 150 to 300 psi. Instead soft washing with a garden hose is least likely to chip dent or crack the tiles or panels. The cost to pressure wash roof starts at 0 33 0 40 per square foot but can vary significantly with site conditions and options.

Use a 20 or 24 inch pressure washer for this task. Pressure washers use 1 300 to 2 800 pounds per square inch to strip dirt moss and even paint from a surface. The power of a pressure washer can damage the shingles on your roof so it s important that you select the proper spray tip. Pressure washing is unlikely to be successful on a flat roof as the membranes used on flat roofs are often very easy to tear and water tends to puddle on a flat surface rather than flowing off.

See typical tasks and time to pressure wash roof along with per unit costs and material requirements. An industrial strength washer will have a long wand that will allow you to pressure wash from the safety of the ground below. Get fair costs for your specific project requirements. However it can take some time to wash and clean the entire area.

You may want to use a pressure washer to clean your flat roof. Otherwise you will need to stand carefully on the roof or a nearby ladder during washing. The average garden hose sprays water at 40 to 80 psi. Always stand on a dry area of the roof as wet shingles can be very slippery.

Start with a medium pressure spray pattern and adjust from there accordingly.