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Plywood-over-Foam “Martha Wall” at City Cabins® Homes

To improve thermal performance of her townhome development “City Cabins” while keeping material and labor costs to a minimum, builder Martha Rose devised a “plywood-over-foam” wall assembly designed to provide greater insulation, air sealing and thermal break.  With her engineer’s stamp, City of Seattle and Shoreline have accepted her innovative design numerous times through prescriptive code compliance.