Our DuroSpan product shown with hotspots that provide additional information.

DuroSpan insulation is a Type 1, closed cell and moisture resistant insulation with a green film laminated to one side, and a silver film on the other side. With an R-value of 3.75 per inch, DuroSpan insulation is ideal for adding energy efficiency and cost savings to any project. It is easy to install and can be used in many applications; exterior sheathing, continuous insulation, basement floor, under slab insulation and cathedral ceilings. The addition of the laminated film to the top and bottom surfaces of DuroSpan insulation board provides a more durable product that is less susceptible to damage.

The reflective facer on DuroSpan insulation contains a thin layer of foil embedded within the film. The reflective facer does not increase the R-value of DuroSpan insulation (for additional information see Plasti-Fab PIB 253 - Facts About Thermal Resistance of Reflective Insulation).

DuroSpan insulation complies with the requirements of CAN ULC S701.1, Standard for Thermal Insulation, Polystyrene, Boards and Pipe Covering, the National Standard of Canada for expanded polystyrene (EPS) insulation.

Available in 4x8 ft, 2 ft high bundles
¾, 1, 1 ½, 2 in. plus special order sizes

Meets all building code requirements
Meets CAN ULC S701.1, Type 1
Laminated/branded product with thin film on both sides
Thermal resistance - RSI 0.65/25 mm (R-value 3.75/inch)
Closed cell insulation resists moisture
CCMC 12424-L
For Retrofit and New Construction

Material Properties of DuroSpan^® Insulation

Material Property	Test Method	Units	Property Values
Thermal Resistance Minimum RSI per 25mm (1 inch)	ASTM C518	m² • ⁰C/W (ft²•h•⁰F/BTU)	0.65 (3.75)
Compressive Resistance Minimum @ 10% Deformation	ASTM D1621	kPa (psi)	70 (10)
Flexural Strength Minimum	ASTM C203	kPa (psi)	170 (25)
Water Vapour Permeance Maximum - 25mm (1 inch) thickness	ASTM E96	ng/(Pa.s.m²) (Perms)	30 (0.5)
Water Absorption Maximum	ASTM D2842	% By Volume	6.0
Dimensional Stability Maximum, 7 Days @ 70± 2℃ (158±40F)	ASTM D2842	% Linear Change	1.5
Limiting Oxygen Index Minimum	D2863	%	24

Thermal Resistance for Some Common Thicknesses
Millimeters	RSI	Inches	R-Value
19	0.49	3/4"	2.81
25	0.65	1"	3.75
38	0.98	1 1/2"	5.63
50	1.30	2"	7.50
75	1.95	3"	11.25
Other Standard & Custom thicknesses available upon request. Standard sizes range from; 2x4,2x8,4x4,4x8.