- Q.Can copper roofing be
installed over SIP roof panels? I have heard that high
temperatures under copper roofing might damage the
A.Bill Wachtler, executive
director of the Structural Insulated Panel
Association, responds: In general,
temperatures would need to exceed 190°F
before any degradation of a SIP would be possible.
In a typical roof application, it’s hard
to imagine that there would not be sufficient
dissipation of heat to prevent temperatures from
rising that high.
Nevertheless, there are preliminary reports of
at least one house with a copper roof installed
over SIPs that developed problems requiring
investigation. That investigation is ongoing, so no
conclusions can be made yet. In the meantime, I
recommend checking with the copper roofing
manufacturer and supplier, as well as the SIP
manufacturer, concerning proper application
procedures. Until better data are available, I
would recommend a cool roof application for copper.
A cool roof application creates an air space
between the SIP roof panels and the metal