Foam wall insulation can be used with a number of other building materials – bought and supplied separately or as a combined product. Siding with insulation is becoming a popular choice as are SIPS (structured insulated panels) as combined units already with insulation included. Elsewhere foam blocks can be inserted into concrete wall blocks or eps sheets attached to drywall to achieve an insulated wall and home. However you use it, eps foam maintains its insulating properties for many years and resists moisture to give the homeowner, a warm, easy-to-heat home.