1-in x 4-ft x 8-ft Expanded Polystyrene Board Insulation in the Board Insulation department at Lowes.com
FANFOLD® 1/4" x 4' x 50' R-1 Squared Edge Foam Residing Board
RMax Thermasheath 4ft x 8ft Polyiso Rigid Foam Insulation Board - All
3/4 in. x 1.25 ft. x 4 ft. R-2.65 Polystyrene Panel Insulation Sheathing (6-Pack) 150705 - The Home Depot
Amazon.com: Foam Insulation Neoprene Sheets with Adhesive,Multi-Function Soundproof Large Marine Closed Cell Neoprene Rubber Roll (W:12 Inch T:1/16 Inch L:59 Inch,Black) : Industrial & Scientific
15 x 12 x 2'' Pink Insulation Foam Thick Foam Insulation Board Insulating XPS Foam Board Insulation Panels for Craft or Window Wall Ceiling Coverings Home Improvements Projects (4) - Amazon.com