Remove pollen and other stains from metal roof

David Wrighter
4/22/2012
I have green colored metal roof that is about 3 years old. the roof is in great conidition but it has what appears to be pollen (lite-yellow) and old chalk line stains on the roof. Soaking theses areas with a detergent/ bleach mix then hitting it with a pressure washer (from a distance) doesn't seem to be removing the stains. My roof is high-pitch and several ares that are very high to the ground so we can not hit these areas directly with the preasure washer. Do you have any reccomendation on some cleaning solutions that will remove these stains? (spray and light rinse removal)
Todd Miller
Classic Products, Inc.
4/22/2012
Opening this up for input. Thanks David.
Info @windowsonwashington.net
An informed customer is our best customer.
4/23/2012
I would first check with the manufacturer on the metal/panel and see what is permissible first and then see what they recommend. I would also make sure that the roof is good and free of the whatever has previously been applied so that there are no chemical reactions between old and new cleaning solutions.
Guest User
8/16/2012
just installed galvanized steel roofing and it had red mud stains whats the best way to remove stains
Todd Miller
Classic Products, Inc.
8/16/2012
They might just weather away naturally. If you want to clean them, I would start with detergent, add TSP if necessary. If this does not work you might gently try some Soft Scrub cleanser.
Guest User
4/15/2015
I have the same problem with pollen. I had to climb on the roof last year and brush off with water- very dangerous. I cannot find anyone willing to clean the roof this year. This problem is not published anywhere when researching the benefits of a metal roof over asphalt shingles. I never had this issue on our old asphalt shingle roof. I am ready to take the metal roof off and put asphalt shingles back on as I do not want to risk falling off the roof and getting hurt. I guess I could just live with it, but the dried pollen looks really bad. Any help would be apprecitated.
Todd Miller
Classic Products, Inc.
4/15/2015
Products like RoofWash and Wet-N-Forget I have heard can work well for removing pollen that builds up. The pollen issue does not happen in most areas of the country, which is good. It is mainly an aesthetic issue but I can see every reason to want to remove it. The products I mentioned can just be sprayed on and then left.
Jeff Cook
5/10/2015
We have heavy pollen here each spring. The best way I have found to remove it is with soap and a soft bristle brush, on an extension handle. You can find the brush and handle at Home Depot or Lowes, and I apply the soap with a hose end sprayer. I work off of an 8' step ladder.

If you would like to reply to this thread, please log in. If you do not have an Ask the Experts forum user account, create one here.

Find a Contractor

Get Started Today

Take the first step to increasing the value of your home with a great looking, durable, fire resistant and energy efficient metal roof. Browse our list of qualified MRA Member Roofing Contractors in your area for a free consultation and estimate.