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Christian Hartwig is an associate product manager for single-ply products, for GAF. He has over six years of experience with thermoplastics, all working for manufacturing organizations in a variety of project management and product development roles. Reach him at chartwig@gaf.com.
When it comes to energy efficiency, all agree that in the summer, white roof membranes reflect the sun’s rays, lowering air conditioning costs — while dark roofs absorb the sun’s rays, raising air conditioning costs.
