We live in Los Angeles and have a flat roof that our hot and cold water copper pipes run across and are all exposed. The cold tap water, in the spring, summer, and fall is so hot during the day. Currently there is only black foam insulation on it. I am thinking there has to be something that will reflect the heat off of the cold water copper pipes and insulate it too.
Plumbing – the best way to insulate cold water copper pipes exposed on a flat roof in California
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Best Answer
I would try white, silver, or foil pipe tape. Even for high quality tape, it is cheap. You can simply wrap it over the existing black foam.