Is there a roof colour that is better for the environment overall?
We are building a house in Zone 4 just over the border in Canada. We are going with a single slab roof with a 2.5:12 pitch that angles to the east and will use metal as our roofing material. We thought we had read (somewhere, can’t find it on the internet) that lighter coloured roof material can act like snow/ice and reflects sunlight back into space, therefore is better for the environment overall from a global warming perspective. Just wondering if there is any consensus out there in the GBA community on that. Just as a note: the microclimate where we are building is predominantly cool and rainy, and air conditioning isn’t used in that area so a lighter roof wouldn’t save on any energy costs. Thank you very much for any responses.
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