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Exterior Inspections Contains discussions about the exterior portion of a home inspection. This includes roofs, gutters, downspouts, decks, patios, windows, etc.

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  #1  
Old 3/1/08, 9:55 PM
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Question Copper on roof to prevent algae

Does anyone know of a website explaining the correct way copper should be added to existing shingles on a roof?

TIA,
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  #2  
Old 3/1/08, 10:00 PM
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Default Re: Copper on roof to prevent algae

I don't know about copper...always used zinc...

See here... http://www.zincshield.com/home.html
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Old 3/2/08, 12:53 AM
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Default Re: Copper on roof to prevent algae

Copper works better than zinc, but zinc is less expensive.



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Old 3/2/08, 6:42 AM
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Default Re: Copper on roof to prevent algae

Carolyn,

They always get installed under the ridge shingles as it is the highest portion of the roof.

I recommend these Zinc strips to my clients.

Yes, Copper will work also.
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Old 3/2/08, 9:09 AM
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Default Re: Copper on roof to prevent algae

Hi to all,

just to add to the confusion The last ones I installed a few years ago were a copper/zinc alloy, I believe zinc is too soft to be used by itself.

I hope this helps (but suspect it doesn't)

Regards

Gerry



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Old 3/2/08, 12:44 PM
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Default Re: Copper on roof to prevent algae

OK - I realize I should've given a little more info on why I ask this question. I went with a friend to look at a house she was thinking of buying. I wasn't doing an inspection, she just wanted me to ride along to see 3 homes she is considering. I didn't have a camera with me & one of the homes had an approximately 6" wide strip of copper nailed about 1 1/2' down from the ridge of the roof. It was kind of woven between the lower edges of the row of shingles above the copper & the nails were driven through & exposed to the exterior.

Well, my friends fiance supposedly worked with a roofer at one point & time & he told her this is how they do it on an existing shingle roof & there is nothing wrong with it. I don't intend to get in the middle, but I told her I would expect the exposed nailheads to leak somewhere down the line, if they are not already.

I wanted to find a website which showed (very simply) how to properly install it to show my friend.
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Old 3/2/08, 1:00 PM
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Default Re: Copper on roof to prevent algae

Quote:
Originally Posted by cwhite2
I went with a friend to look at a house she was thinking of buying. I wasn't doing an inspection, she just wanted me to ride along to see 3 homes she is considering.
That sounds like my WALK inspection that I do for property investors. Since there obviously is a demand in your area, consider offering choices if you don't already.



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  #8  
Old 3/2/08, 1:10 PM
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Default Re: Copper on roof to prevent algae

Quote:
Originally Posted by cwhite2
OK - I realize I should've given a little more info on why I ask this question. I went with a friend to look at a house she was thinking of buying. I wasn't doing an inspection, she just wanted me to ride along to see 3 homes she is considering. I didn't have a camera with me & one of the homes had an approximately 6" wide strip of copper nailed about 1 1/2' down from the ridge of the roof. It was kind of woven between the lower edges of the row of shingles above the copper & the nails were driven through & exposed to the exterior.

Well, my friends fiance supposedly worked with a roofer at one point & time & he told her this is how they do it on an existing shingle roof & there is nothing wrong with it. I don't intend to get in the middle, but I told her I would expect the exposed nailheads to leak somewhere down the line, if they are not already.

I wanted to find a website which showed (very simply) how to properly install it to show my friend.
Carolyn,

Exposed nails do not have to be removed. Simply recommend a dab of roofing tar onto all roofing nail heads.
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  #9  
Old 3/2/08, 2:02 PM
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Default Re: Copper on roof to prevent algae

I love this site Carol, always has good info:
http://www.askthebuilder.com/B374_In...Shingles.shtml

Here is a list of the roofing issues he's discussed.

http://www.askthebuilder.com/Roofing.shtml



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Old 3/2/08, 4:14 PM
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Default Re: Copper on roof to prevent algae

Thank you Peter - That's what I was looking for. Much appreciated.

Thank you to everyone else too.
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