James Pollon
I am building a house in the Turks and Caicos, where it is hot all year round. My intention is to use a Gerard metal roofing which immitates clay tile. My contractor assures me that metal roofs reflect the heat well enough to forgo insulation. As I am on a buget I do not want to do anything thats not essential. Would it be a critical error not to insulate? The roof is open rafter, no attic. Any suggestions as to easy to install, lower cost insulation options.
Allan Reid
Dura-Loc Roofing Systems, Inc.
I am director of manufacturing for Gerard and Dura-loc and offer the following. Two things about the suns rays. First is the reflective rays which give colour. White being the best and black being the worst. Rays that reflect do not convert to heat The scond then is the balance of the rays that convert to heat as soon as they hit an object. It is what the roofing material does with the heat that is most important. The stone coated Gerard roofs emit 92 % . Still there is a percentage of heat that goes through. We tested systems with the USDOE at Oakridge TN and the number one thing to do is to create a cavity under the roof covering and underlayment and ventilate it vertically at the eave and ridge . Do this and you will have an efficient system.
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