Cleaning moss off your roof not only improves it's appearance but also increases the life span of your roof. It is important to not only remove moss but to prevent further growth. This is a guide about removing moss from a roof.
I recently had my mossy roof sprayed with Spray and Forget and now have a roof covered with dead moss. How do I get this off? It looks worse than when it was green, even though I know this is better. I'd like to know how to get rid of it. Thanks.
By Joan from Rangeley Plantation, ME
This is from the Popular Mechanics website: www.popularmechanics.com/home/improvement/outdoor.../4217233
They suggested killing the moss then get on the roof with a pressure washer and starting at the top of the roof, spray down the roof
I need to add a warning on killing the moss. Do not use Tide or bleach as these will shorten the life of the roof considerably.
Bleach is what most, if not all, roofing shingle manufacturers recommend using on their products, what you don't want to use is elbow grease... and careful not to sweep away any granules which keep the shingles doing their jobs, if your not exactly sure on how to deal with moss on your roof, hire someone who does.
I have black streaks of mold on the shingles on the roof of my house. How can I clean it?
By Susan from TX
I have been in the roof cleaning business for years now and I can tell you that Sodium Hypochlorite (Chlorine, bleach) is safe for roof washing. The Asphalt Roofing Manufactures Association (ARMA) recommends a solution that contains bleach to remove the black streaks. It will not harm your roof. I have videos and before & after pictures on my web site as evidence.
When looking to hire someone to wash your roof, ask them these questions:
1) Do they have the proper insurance
2) What process will they be using? (soft wash or low pressure washing is the only way to apply the proper mixture to the roof. High pressure will not only void warranties but it will damage the shingles)
3) How long will it take before the black streaks are gone? (depending on the severity of the algae infestation, it should not take more than 1 hour)
4) How long before the algae returns? (the algae needs three things to survive, moisture, shade and a food source. If you have overhanging trees or tall building nearby, it will return sooner than later. Two to four years is average with many lasting longer.)
A few of the response have the answers right ARMA is the shingle manufacturer recommendations is correct. JiminNJ is right on target with his response. Here is what it looks like up close just to get a better idea.
I have a three tab asphalt composition shingle roof. If I use Tide with bleach and spread it by hand all over my roof, I understand it will damage my roof. However, how long will it take a week, month, year, or one to four days to get rid of the moss?
First of all in order to grow moss the roof must be staying damp and dark so I would trim up any trees hanging over the roof, especially on the north and east sides.
Second, moss requires an acid environment to live so your best bet would be to sprinkle some agricultural lime on the roof to cut the acidic condition.
Are you by chance mistaking mold for moss?
I have an outside shed that has one side covered with moss. Any suggestions about removing the moss without damaging the shingles?
By Peggygram from Maryland
Here's a tip I've submitted: (I don't think it's been posted on ThriftyFun yet).
Remove moss and algae without scrubbing: This product is amazing! You spray it anywhere you want to remove algae and moss, or to stop it from to growing. Just put it into a garden sprayer and spray it on once a year, then every time it rains, it binds with the rain and starts working. It's amazing stuff with no scrubbing required! It's called "Spray and Forget". You can buy it at Home Depot. I use it on my mobile home, my garage siding, and on our camper. I used to have quite the moss and algae problem, but no more. It also removes mildew, fungus, and lichen stains from roofs, siding, decks, brick, stucco, and other exterior surfaces with no scrubbing required.
Products Q and A:
I know that using bleach to kill, and zinc to prevent is OK. The problem I have, is that the roof I've got is huge. I bit off more than I can chew in buying this property, and it's getting quite a lot of moss growth. I know I must remove and prevent.
The problem is that I do not know what jet system to use to mix the bleach and water. Also, I can only do this from a ladder.
The zinc will have to wait.
Thanks in advance.
I have the same problem with my roof, so I contacted the manufacturer of my roofing shingles and they recommended a product called "Shingle Shield". I read that bleach can damage your roof, so even though it may be initially cheaper to treat, in the end if you have to replace your roof, it will be much more costly.
You can check out "Shingle Shield" at http://www.rainhandler.com. They also have a question and answer section that may be very helpful to you regarding application, equipment necessary, prevention, etc. The phone number is 1-800-942-3004 (06/10/2005)
I have used the same company for over 20 years, and there is nothing they can't fix. Totally trust worthy and reliable, prompt and professional. Apex Edinburgh 01314787175 (10/02/2008)