Roofing/cool roof


hi..just need to ask a couple of questions.  first, when a cool roof is installed, is the old roof first taken down?  second, if a cool roof is put over an old roof, how do you know the old roof is not rotting someplace in it? what is the usual procedure for installing a cool roof?  thanks you very much!!

A cool roof is not a type of roof. It is a temperature. You can lower the temperature of a roof in many ways. It can be a reflective coating on top of what you have. It can be a new roof that has a light color. If a roof has to be torn off has nothing to do with its color but what condition the old roof is in - will it be able to attach to it.

If a "cool" roof is put over a new roof the old roof can't rot as it would have to get wet to do that. It can't get wet if there are no holes or leaks in the new roof unless you're referring to condensation.



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Brad Zacharia


All aspects of residential Roofing. This includes shingles and flat (low slope) roofs. I have knowledge in the installation as well as the design of roofs from an engineering standpoint.


I have been doing roofing for 40 years. This was my father's business and I took it over in 1980.

I have written responses to artcles that I felt needed a response to and those responses have been published in roofing trade magazines.

BSEE Drexel University

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