Sustainability and energy efficiency are buzz words in the
roofing industry. Highly reflective roof systems, vegetative
coverings and roof-mounted photovoltaic systems are in the
headlines every day. Although these sustainable and
energy-efficient features are valid, they should be secondary to a
properly installed insulation layer within a roof system.
A proper design for an insulation layer is two or more layers of
insulation with staggered and offset joints and a cover board layer
to separate the primary thermal insulation layer from the membrane.
Mechanical fasteners only should be used to secure the bottom
layer(s) of insulation, not the top layer.
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