Polystyrene sheets are a common sight in the building trade. They are economic and highly effective insulating materials for homes and commercial premises.
Extruded Polystyrene vs. Expanded Polystyrene vs. Polyisocyanurate
Polystyrene Uses, Features, Production and Definition
3/4 in. x 1.25 ft. x 4 ft. R-2.65 Polystyrene Panel Insulation
Polystyrene - Wikipedia
Effective Uses Of Polystyrene Sheets
The difference between Polyiso, EPS & XPS Foam Insulation
Polystyrene - Wikipedia
Effective Uses Of Polystyrene Sheets
The Benefits and Disadvantages of Extruded Polystyrene Insulation