LinksHello, fellow DIYers!
I just wanted to pass this along, since I've tried it, and it works.
If your roof has overhanging tree limbs, or just plain doesn't get a lot of sun, you may end up with a moss problem. I didn't even know I had one until my insurance company sent me a very unfriendly note about getting rid of it "or else". In my case, they also insisted upon having me hire a contractor to certify the work, blah, blah, blah, etc, etc. Well, I wasn't too pleased with the whole idea. So I took a look at the moderately small amount of moss in question, and asked my friend the internet what I should do about it. Here's the short version:
1. Put on clothes that you wouldn't mind throwing away when you're done. I'll explain later... You should also take a look at what's at the end of your downspouts. If it's alive, you may not want to use this method, or you may want to find a way to direct them to somewhere that doesn't have living stuff.
2. Get your garden hose up there and give it a good spray! Be careful if you need a ladder for this. I wouldn't do the power-washer thing, but a fair amount of pressure will lift up a lot of the moss right away (without lifting up the shingles too much).
3. Mix household bleach and clean water in a sprayer. My sprayer was 10 bucks from Harbor Freight during the parking lot sale. Bleach is about $2 a gollon where I live.
4. Carefully climb up and get close enough to give the moss a REALLY good soak with the bleach and water. I mean really. The sprayer should have an adjustable nozzle. I set mine for "long stream", not "fine spray" so I wouldn't have to climb all the way up. You're likely to get a good deal of blow-back if it's windy. That's why you wanted those old, crappy clothes instead of your Sunday best.
5. Wait a few minutes. I gave it something like 45 minutes to sit.
6. Pull the garden hose back up, and rinse well. The rest of the moss came right off for me. At this point, you've probably guessed why we cared about what was below the downspout. All that bleachy water will be draining there as we hose her down. I'm no expert, but I'm guessing plants don't take well to that kind of treatment.
At the end of the day, I had no moss at all. I also had a new insurance company (one that never saw a hint of moss on my roof), and maybe I made some contractor out there buy his own lunch (no worries, I've got lots of stuff I'm happy to pay him for - just not this one).
That's the whole story, kids. Remember: Be careful when you're playing with bleach on a ladder.
I just wanted to pass this along, since I've tried it, and it works.
If your roof has overhanging tree limbs, or just plain doesn't get a lot of sun, you may end up with a moss problem. I didn't even know I had one until my insurance company sent me a very unfriendly note about getting rid of it "or else". In my case, they also insisted upon having me hire a contractor to certify the work, blah, blah, blah, etc, etc. Well, I wasn't too pleased with the whole idea. So I took a look at the moderately small amount of moss in question, and asked my friend the internet what I should do about it. Here's the short version:
1. Put on clothes that you wouldn't mind throwing away when you're done. I'll explain later... You should also take a look at what's at the end of your downspouts. If it's alive, you may not want to use this method, or you may want to find a way to direct them to somewhere that doesn't have living stuff.
2. Get your garden hose up there and give it a good spray! Be careful if you need a ladder for this. I wouldn't do the power-washer thing, but a fair amount of pressure will lift up a lot of the moss right away (without lifting up the shingles too much).
3. Mix household bleach and clean water in a sprayer. My sprayer was 10 bucks from Harbor Freight during the parking lot sale. Bleach is about $2 a gollon where I live.
4. Carefully climb up and get close enough to give the moss a REALLY good soak with the bleach and water. I mean really. The sprayer should have an adjustable nozzle. I set mine for "long stream", not "fine spray" so I wouldn't have to climb all the way up. You're likely to get a good deal of blow-back if it's windy. That's why you wanted those old, crappy clothes instead of your Sunday best.
5. Wait a few minutes. I gave it something like 45 minutes to sit.
6. Pull the garden hose back up, and rinse well. The rest of the moss came right off for me. At this point, you've probably guessed why we cared about what was below the downspout. All that bleachy water will be draining there as we hose her down. I'm no expert, but I'm guessing plants don't take well to that kind of treatment.
At the end of the day, I had no moss at all. I also had a new insurance company (one that never saw a hint of moss on my roof), and maybe I made some contractor out there buy his own lunch (no worries, I've got lots of stuff I'm happy to pay him for - just not this one).
That's the whole story, kids. Remember: Be careful when you're playing with bleach on a ladder.