Reroofing and lightning protection

Reroofing and roof maintenance are seldom as simple as just applying a new layer of roofing. Indeed, they can often require selective demolition, roof deck repair and penetrations, insulation, new rooftop equipment, flashings, and repair and extension of other existing work.
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Understanding trap-seal protection devices

Building codes are gradually changing across North America to allow waterless trap-seal protection devices (TSPDs) in lieu of trap primers. Depending on the jurisdiction, the products can be employed as substitutes in retrofit situations where trap primers have failed. What do design/construction professionals need to know?
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