 roof shingles & algae (by Chris [VA]) Nov 2, 2012 11:00 AM
 roof shingles & algae (by Steve [MA]) Nov 2, 2012 2:47 PM
roof shingles & algae (by V [OH]) Nov 2, 2012 5:46 PM
roof shingles & algae (by BRAD 20,000 [IN]) Nov 2, 2012 8:40 PM
roof shingles & algae (by Chris [VA]) Nov 3, 2012 4:15 AM
roof shingles & algae (by TIM [IN]) Nov 3, 2012 5:26 AM
roof shingles & algae (by TIM [IN]) Nov 3, 2012 5:26 AM
roof shingles & algae (by Steve [MA]) Nov 3, 2012 5:39 AM
roof shingles & algae (by Smokowna [MD]) Nov 3, 2012 6:09 AM
roof shingles & algae (by Chris [VA]) Posted on: Nov 2, 2012 11:00 AM
Message:
We are replacing a roof at one of our rentals (a 1992 Cape Cod) which has a pretty steep pitch. Our distributor carries both GAF & Certainteed 30-year dimensional shingles for almost the same price. Does anyone know if one is better than the other, and if one might also be better in terms of algae resistance? Thanks.
--70.105.xx.xxx |
roof shingles & algae (by Steve [MA]) Posted on: Nov 2, 2012 2:47 PM
Message:
It use to be that shingles that had an algae treatment actually seemed to do something. Lately I've notice that almost every roof in my area is starting to show signs of algae especially on the northerly side. I don't know if it's something in the atmosphere or if they treatment process has been changed.
I have started to use a strip of zinc flashing across the top of the roof just under the ridge cap. The next one we do I might just use my break to fashion a ridge cap out of zinc flashing. --71.243.xx.xxx |
roof shingles & algae (by V [OH]) Posted on: Nov 2, 2012 5:46 PM
Message:
Why not fashion a metal roof, double the warranty time and in actuality 3 times the life. --98.103.xx.xx |
roof shingles & algae (by BRAD 20,000 [IN]) Posted on: Nov 2, 2012 8:40 PM
Message:
Chris, some of the brochures will talk about algae resistance.
But I'm not convinced. I see staining on some 2 year old roofs. I recommend Steve's zinc strip. (time for me to learn how that's done!) --50.129.xxx.xxx |
roof shingles & algae (by Chris [VA]) Posted on: Nov 3, 2012 4:15 AM
Message:
Thanks, everyone. Any more details on the zinc strip would be welcome, as we will order materials next week. And I'm guessing there is no preference for either GAF or CertainTeed. (Also, this is the only rental we have in an HOA neighborhood, so a metal roof is not an option.) --70.105.xx.xxx |
roof shingles & algae (by TIM [IN]) Posted on: Nov 3, 2012 5:26 AM
Message:
My understanding is the zinc strip is nailed to your ridge cap. When it rains, the zinc washes down the roof. killing the algae or preventing it. Not sure how often you need to replace though... --67.236.xxx.xxx |
roof shingles & algae (by TIM [IN]) Posted on: Nov 3, 2012 5:26 AM
Message:
My understanding is the zinc strip is nailed to your ridge cap. When it rains, the zinc washes down the roof. killing the algae or preventing it. Not sure how often you need to replace though... --67.236.xxx.xxx |
roof shingles & algae (by Steve [MA]) Posted on: Nov 3, 2012 5:39 AM
Message:
The higher concentration of zinc the better. If you use just regular galvanized flashing it will start to rust once the zinc wears off. I get rolls from my local lumber yard. I'm sure that most better lumber yards & roofing suppliers must carry it. Copper flashing works as well however it's much more expensive.
We us a 4" tall strip installed about 1" under the last course of shingles across the entire ridge of the main roofs & any dormer roofs. Sometimes we install a strip under skylights and just below dormers.
A quick Google search shows;
www dot zincshield dot com/home.
www dot wash-safe dot com
Question:
I am thinking of using bleach on my asphalt roof to get rid of the moss. Can this harm the roof and is it the best way to get rid of the moss?
Answer:
Do not use bleach on your roof. There are a few ways to remove moss from your roof, but nothing is permanent. If the moss build-up is slight, you can leave it. Moss on the north side of the roof is a very common problem. You can take care of that moss by mixing 2 pounds of Zinc Sulphate into 5 gallons (20 liters) of hot water. Using a low pressure garden sprayer, apply the solution to the roof surface at a rate of 1 gallon (4 liters) to 100 square feet of roof space. Simply leave it as is and let Mother Nature dispose of the moss and algae with wind and rain. Zinc sulphate is available at most hardware stores. If the roof is not too old, under about 5 years, you could consider installing a strip of Zinc under the ridge caps.
Zinc Or Copper Strips And Flashing
These metals when placed in strips just below the ridge cap or installed as a ridge cap flashing will react with the water running over the surface to produce a mild chemical solution that will reduce moss and algae growth for many years. Many asphalt shingle manufacturers now offer products with the granules having content of these metals. The effectiveness of strips placed near the ridge will vary with the surface area of the strip and the amount of water running over it. The affect of the strip on the moss and algae is usually good for at least 10 to 15 feet. Packaged zinc strips with instructions are available in most home improvement stores. When installing zinc strips fasteners through roofing materials should not be left exposed to avoid possible roof leaks. --71.243.xx.xxx |
roof shingles & algae (by Smokowna [MD]) Posted on: Nov 3, 2012 6:09 AM
Message:
Brad it is easy, get a nice red car...drive slowing down to about 25 mph, toss your business card out the window towards the roofers and yell "Call me, I have work for you"
Resume acceleration.
--173.66.xx.xxx |
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