Name: Expanded Polystyrene Rigid Insulation
Brand: Airfoam Industries
SKU: EPS-T1-1.0-2X8
Price: 10.0 NZD
Availability: InStock

Rigid Foam Insulation

Korolite^® Expanded Polystyrene (EPS) is a high-performance, closed cell, rigid foam insulation material that uses air as main ingredient. EPS insulation resists moisture and mold/fungi growth with low environmental impacts, high Long-Term Thermal Resistance, and good drying potential over the long service lives of buildings.

Applications & Properties

Korolite^® EPS can be used to insulate the entire building envelope, as Void-Fill, and for impact noise reduction in floors.

The Canadian CAN/ULC-S701 "Standard for Thermal Insulation, Polystyrene, Boards and Pipe Covering" provides material properties of various EPS Types:

Property¹	Units	CAN/ULC-S701 Types			ASTM Test
Property¹	Units	1	2	3	ASTM Test
Compressive Resistance Minimum @ 10% Deformation	kPa	70	110	140	D1621 Proc.A
Compressive Resistance Minimum @ 10% Deformation	psi	10	16	20	D1621 Proc.A
Thermal Resistance² R_SI / 25mm thickness Minimum @ 24°C	m²•°C/ (W•25mm)	0.65	0.70	0.74	C518
Thermal Resistance R-Value / inch thickness Minimum @ 75°F	ft²•hr•°F/ (BTU•in)	3.75	4.04	4.27	C518
Flexural Strength Minimum	kPa	170	240	300	C203 Proc.B
Flexural Strength Minimum	psi	25	35	44	C203 Proc.B
Water Vapor Permeance² Maximum at 25mm thickness	ng/(Pa•s•m²)	300	200	130	E96
Water Vapor Permeance² Maximum at 25mm thickness	perms	5.2	3.5	2.3	E96
Water Absorption³ Maximum	% by volume	6.0	4.0	2.0	D2842
Dimensional Stability	% linear change max.	1.5	1.5	1.5	D2126 7 Days @ 70±2°C
Limiting Oxygen Index	% min.	24	24	24	D2863

¹ The test methods used to determine the above material properties provide a means of comparing different cellular plastic thermal insulations. They are intended for use in specifications, product evaluations and quality control, but they are not intended to predict end-use product performance. ² Values are for 25mm thick samples with natural skins intact. Better values will result for thicker materials. ³ The lab-test method for water absorption uses complete submersion under a 2-inch head of water for 96 hours, so the values are applicable to specific design requirements only when the end-use conditions are similar to test method requirements.

Additional Properties of EPS

Expanded Polystyrene (EPS) resists mold & fungi growth per ASTM C1338 and has no nutritional value for insects. To protect against termites place adequate physical barriers such as membranes around below-grade EPS.
Max. Service Temperature: Long-Term Exposure 75°C [167°F], Intermittent Exposure 80°C [176°F]
Thermal Expansion coefficient: 5-7•10^-5/°K
Dimensional Stability¹: max. 1.5% linear change per ASTM D2126 (7 Days @ 70±2°C)
Solubility: Insoluble in water and in general chemically inert. EPS dissolves in hydrocarbons (e.g. fuels, oils, tar), organic solvents (e.g. acetone/ketones, benzene, paint thinner), ethers, esters, aldehydes and amines. Capillarity: None
UV-light surface degradation: white EPS can be exposed to direct sunlight for a few weeks. Prolonged exposure to ultraviolet light creates a yellow dust on the surface of EPS products which has negligible impact on the products' properties but may require removal before adhering other materials such as stucco or self-adhesive membranes.
Surface Burning Characteristics Canada CAN/ULC-S102.2: Flame-Spread Rating ≤295, Smoke Developed Classification over 500.
Limiting Oxygen Index: min. 24% per ASTM D2863. Airfoam's EPS for construction applications contains a polymeric (non-HBCD) fire retardant modifier.
CAUTION: EPS products are combustible and must not be exposed to excessive heat, sparks, open flames, or any other sources of ignition. A protective barrier or thermal barrier is required as specified in the appropriate building code. If stored/used in closed containers, confined, or low-lying areas, ensure adequate ventilation to prevent accumulation of flammable pentane vapours. Prevent inhalation of smoke, fumes or dust from burning or fabrication activities. GHS Classification: Non-Hazardous, see SDS