How To Clean A Metal Roof From The Ground. Most services will give the roof a wash with a power washer and some gentle detergent to clean the debris without stripping the coating on the metal shingles. You only need low pressure on metal roofs, as it is enough to disturb and clean them.
From the ground, use a broom or leaf blower to remove leaves, branches and other loose debris. Turn the black dial to the “off” setting and you’re done! We recommend hot water because metal roofs can handle it and hot water is more effective.
There are instances where no cleaning tools other than water are necessary.
Start by spraying your roof with a hose or a normal wand attachment. Once you have all safety measures in place, follow these easy steps to clean your metal roof: But of course, if the roof is really bad i may have to walk the roof with a power washer, but set at very low pressure, about 400 psi about 12 inches away. To do this, you have to know the size of your roof first: