As drywallers, we’re used to most of our work being the backdrop for other finishes. Increasingly, however, we’re adding those details that make a home’s interior stand out, such as the coffered ceiling shown here. Several manufacturers make EPS polystyrene moldings and trim for exterior and interior use. (We buy from Foamcore Architectural Mouldings in Toronto; foamcoremouldings.com.) These moldings are more commonly used for synthetic-stucco exteriors, sometimes called EIFS (exterior insulation and finish system). Recently, they have been adapted for interiors by applying a smooth coat of joint compound to the high-density EPS substrate. The visible surfaces are caulked and painted later.
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