Call a roofer unless you're *really* a DIY kind of person. Get a Galvanized flashing installed that hangs out under the ridge. Somehow, the Galvanized stuff eliminates the moss/mildew by magic. (Look around your pipe vents,,,, no mildew under them, huh?)
I would recommend that you call a pressure washing company. They can Zip the Moss away in NO TIME. NOW if YOU want to do it I will tell you that it can be a Dangerous job. Moss is VERY SLIPPERY. If you have a 1 story or 2 story it can be even more dangerous. In HAWAII where I live we use s pressure with a lot of pressure rated yo the Machine. You can Rent this by the day or Week. In Hawaii we have Mildew so half a gallon of Clorox and half a gallon of water does just fine. I do not know what kind of moss you are talking about. You will have to call a Hardware Store and get the info. from then. Remember to wear gloves and good rubber boots, plus a Ventilator for the fumes. Some times these jobs are left best to the EXPERTS. Get at least 4 Estimates and do not take the CHEAP ONE. Call for References and License, YEARS in Business and Better Business Bureau. This is NOT AN EASY JOB. Find out what is Causing this problem. GOD BLESS YOU AND ALOHA - HAWAIIAN BOB!
Login using the form on the top of the page to post feedback (if you are a registered user). If you have not yet registered, click here to do so. It's FREE!.