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Ted Mooney, P.E. RET
Pine Beach, NJ

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Roof Patina Interacting with Cedar Wood

I am going to be doing a green heat patina on a copper roof in north eastern Colorado. I just learned that the house, which is made of cedar, is going to have some overhangs which will be above the copper. I understand that cedar has acids in it which will turn the copper black if water drips from the wood to the patinated copper roof. Is there any way to prevent this? I have to work on the copper panels before they are installed, so that makes life somewhat easier. I have some ideas but wanted some more opinions...

Sama Blackwell
- Lafayette, Colorado, USA
2001

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