Understanding the metal roof form
It's important to know what kind of metal roof you have before we discuss how to use a pressure washer to clean your metal roof. For the purposes of this tutorial, there are two primary choices. The flat metal roof with a slight slope comes first. This does not actually indicate that it is absolutely smooth, but it is flat enough to be able to walk on it. Just make sure you are using extreme caution because it can be very slippery for this sort of roof.
The second option is a metal roof with a moderate to high pitch. These are not safe for walking on at all. You'll need accessories instead that allow you to spray the roof from a ladder.
You need the right safety facilities
You have to make sure that you have the necessary protection equipment before you can get on a roof and clean it. Second, you need hardness and you need to fall safely. These can be used for getting on any roof, but because of how slippery they are, they are particularly crucial on metal roofs. As metal roofs have coatings to cover them, make sure that the ladder you have has padded stabilizers. You do not want this coating to be scratched or harmed, which is why you need padded stabilizers.
The right equipment is required
Once you have the required protection equipment, then it is time to make sure you have the necessary pressure washing equipment. Start off with a 40-degree hot water pressure tip. This is very effective at eliminating algae and mildew, both of which grow on metal roofs frequently. On metal roofs, you just need low pressure as it is enough to disrupt and clean them. Since metal roofs can handle it and hot water is more effective, we recommend hot water.
Then get a sprayer with 12 volts or gas-powered detergent. This makes it easy for you when you are on the ladder to coat your metal roof with detergent. As mentioned above, it is still slippery when wet, even if you have a flat metal roof, so a sprayer that can operate from the ladder is the best choice.