... your option XPS board Application:Perimeter Insulation, Inverted Roof, Thermal Bridge Insulation, Floor Insulation, Core Insulation,Steep Roof Insulation, Ceiling Insulation, Frost Protection for Road and Rail ... used 35-50 years.Resistance to compression: compared with other thermal insulation material(200Kpa for EPS), it has better compressive strength(around 300Kpa ...