Expanded Polystyrene (EPS) is a high-performance, closed cell, rigid foam insulation material containing air as main ingredient. EPS insulation resists moisture, mold, and fungi with low environmental impacts, high & stable Long-Term Thermal Resistance, and good drying potential over the long service periods of buildings. Adding continuous insulation (c.i.) offers higher effective insulation values than adding similar amounts of cavity-insulation and it greatly reduces the risk of condensation and mold on framing members with proper detailing & installation. All Korolite® types are available in various standard and customized sizes & thicknesses.
Meets NFPA 285 with specific limitations for an exterior wall assembly with EPS c.i.
Expanded polystyrene (EPS) is resistant to mold & fungi 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 •
Limiting Oxygen Index: min. 24% per ASTM D2863. Airfoam's EPS for construction applications contains a polymeric (non-HBCD) flame-retardant modifier.
Surface Burning Characteristics: CAN/ULC-S102: Flame Spread ≤290, Smoke Developed over 500. USA ASTM E84ª: FSI ≤75, SDI ≤450
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.
GHS Classification: Non-Hazardous, see SDS
CAUTION: EPS products are combustible and must not be exposed to excessive heat, sparks, open flames, or any other sources of ignition. 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. In addition, a protective barrier or thermal barrier is required to separate EPS products from interior living or conditioned spaces as specified in the appropriate building code.
ª Ceiling measurement only, conducted through determination of flame spread index and smoke developed index with the removal of any contribution of molten materials ignited on the floor of the Steiner tunnel.