PSI and GPM are both equally important when choosing a pressure washer. The PSI indicates the amount of pressure and GPM indicates the flow. You must have the correct combination of PSI and GPM to have the most ideal pressure washing system for your needs.
When it comes to cleaning your roof, maker sure your technician is cleaning with low pressure/high volume. 1500 PSI is ideal with 8-10 GPM for actual cleaning power without damaging the roof material.
If you are looking to improve the look of your roof and remove dirt and moss from the shingles, pressure washing is a great option. We use the proper techniques to effectively wash the surfaces without causing damage to shingles or gutters.
Your roof, deck, sidewalks, driveway and more will look brand new and free of damage- causing debris. Hire a professional often to safely and effectively remove buildup of dirt and debris.