Dow Building Solution extruded polystyrene foam (blue board insulation), hole in the wall
Dimensions variable

Worldwide, extruded polystyrene insulation from Dow Building Solutions, with its distinctive Blue color, is the most widely used extruded polystyrene foam insulation in residential, commercial and industrial buildings - for both new construction and renovation applications. The opening in the wall is an always-sunny window and recalls the most bright and serene days.