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Copper Roof Strips
Due to the worldwide out-of-control demand for copper and the resulting daily rising prices, I've decided to discontinue selling the product. It's too much work to adjust pricing and the risk/reward formula is out of balance. You can find the same copper at all most all big box stores and it's sold as a deck-flashing product. Good luck. - Tim Carter
These copper strips can be installed with new shingles or you can apply the copper on top of the ridge cap shingles on an EXISTING ROOF to extend the life of asphalt shingles.
Here's how to install the copper on a new roof installation:
The strips can be nailed over existing cap shingles, over existing ridge vent or they can be installed in place of cap shingles in a new roof installation.
On hip roofs, the copper strips need to be installed along the entire length of each hip.
The copper almost always weathers to a deep nut-brown color within a year and in many cases can't be seen from the ground because of the low profile.
AsktheBuilder.com founder, Tim Carter, discovered that copper ions prevent asphalt molecules from cross-linking. If too many asphalt molecules cross link, they become brittle and inflexible.
Asphalt shingles that don't have copper washing over them will oxidize and start to lose the colored granules, they'll curl and start to crumble.
Here's the roof that Tim saw that is proof the copper protects asphalt shingles from deteriorating:
Carter explains all this in his recent book Roofing Ripoff - Why Your Asphalt Shingles are Falling Apart and What You Can Do About It.