I am priceing a foof cleaning on a home with copper gutters, valleys and dormers. In reading Chris' post from this past June it was noted that our roof cleaning mix will remove the patina from the copper. Has anyone had any experience with copper gutters since June. Are there any other effects that SH may have on copper. Can it damage it in any way?
Sh will oxidize the copper gutter or potentially darken them unequally and if it gets on the fascia of the gutter could make it look calico like. Most copper is mixed with more or less other metals or alloys so the outcome could really be unpredictable.
Keep them constantly wet. Do not let the SH sit even for a couple seconds. Also do not lean a ladder on them as they will be very very malleable and will bend easily and are very expensive to replace. I have cleaned homes with them with no problems. Good luck.
Copper reacts very differently in areas within the same piece of metal. Your best bet is to keep all the copper VERY wet and continually being washed. Good luck, you may need it. Gary