The exterior walls of ‘historic’ buildings are typically constructed of multi-wythe masonry, which controls rainwater by absorption and evaporation. This type of assembly does not have internal drainage and often lacks flashings at critical locations (e.g. window heads).
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Designing and constructing with structural insulated panels (SIPs) can create a tight, energy-efficient building envelope. As with other high-performance wall and roof assemblies, managing air flow and moisture is necessary for maximizing energy savings, occupant comfort, and building longevity.
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Economic reasons make carbon sheet steel popular for metal roofing, but the material can corrode when exposed to both oxygen and moisture. For this reason, steel typically has a coating, but the protective role differs among products.
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