R-Tech 1 1/2 in x 48 in. x 8 ft. R-5.78 EPS Rigid Foam Board Insulation 320817 - The Home Depot
R-Tech 2 in. x 48 in. x 8 ft. R-7.7 EPS Rigid Foam Board Insulation 310891 - The Home Depot
I made a cheap grid from 1x4 furring strips, dropped 2 inch foil faced rigid foam then rolled out 48” pole building insulation on top. Keeps my metal building car shop nice
Rigid Board Insulation: The Ultimate Guide
Dow R-10, 2-in x 4-ft x 8-ft Faced Polystyrene Board Insulation in the Board Insulation department at Lowes.com
Super TUFF-R 2 in. x 4 ft. x 8 ft. R-13 Rigid Foam Board Insulation 99060464 - The Home Depot
RMax Thermasheath 4ft x 8ft Polyiso Rigid Foam Insulation Board - All
Rigid-Foam Insulation - Fine Homebuilding
Foam Board Insulation 2 in x 4 ft x 8 ft R-9.4 GPS HalfBack
RIGID SQUARE EDGE FOAM SHEETS - Foam Mart
Owens Corning FOAMULAR NGX F-250 2 in. x 4 ft. x 8 ft. SSE R-10 XPS Rigid Foam Board Insulation 52DDNGX - The Home Depot
Insulfoam R-7.7, 2-in x 4-ft x 8-ft Faced Polystyrene For Use In Garage Doors Board Insulation in the Board Insulation department at Lowes.com
Owens Corning FOAMULAR 150 2 in. x 4 ft. x 8 ft. R-10 Scored Squared Edge Rigid Foam Board Insulation Sheathing 45W - The Home Depot
Combining Exterior Rigid Foam With Fluffy Insulation - GreenBuildingAdvisor