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Korolite Rigid Insulation
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.

 New 

Gray Korolite® Graphite-enhanced EPS (GPS) provides up to 25% more insulation value than white EPS.

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, rot and mold with proper detailing & installation. All Korolite® types are available in various standard and customized sizes & thicknesses and can be factory-tapered to create drainage slopes.

Rigid Insulation Boards

Benefits

Exceptional Insulation Value

Budget-friendly, stable long-term Thermal Insulation resists moisture and many other adverse effects at the highest insulation value per dollar spent

Cozy, Healthy Indoor Environments

Continuous insulation blanket with no formaldehyde nor off-gassing during normal use, does not promote the growth of mold or mildew

A Breeze to Design & Install

Design flexibility, versatility, and support for all your project needs, available in many compressive strengths and thicknesses. For high jobsite productivity, EPS products are lightweight & easy to handle and cut.

Environmentally Responsible

Excellent durability, low embodied carbon & environmental impacts using air as insulator. Some products are available with recycled content.

Applications & Properties

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

EPS Insulation around the entire building envelope
Roofing Insulation
Underslab and Continuous Wall Insulation
Void Fill and Seismic Buffer
Material Properties of Korolite® EPS Insulation Types
Property¹ Units Korolite® EPS Types Test Std.
100 130 160 200 250 400 600
Third-Party Certified Type Canada 1 1+ 2 2+ 3     CAN/ULC-S701.1
USA I VIII II II+ IX XIV XV ASTM C578, ICC-ES AC12
Compressive Resistance2 Minimum
@ 10% Deformation psi 10 13 16 20 25 40 60 ASTM D1621
Proc.A
kPa 70 90 110 140 172 276 414
Thermal Resistance3,4 Minimum at mean temperatures of:
R-value/inch thickness ft²•hr•°F/ (BTU•in) 25°F: 6 4.2 4.4 4.6 4.6 4.8 4.8 4.8 ASTM C518
or C177
40°F: 6 4.0 4.2 4.4 4.4 4.6 4.6 4.6
75°F: 3.75 3.8 4.04 4.1 4.27 4.27 4.3
RSI / 25mm
thickness		 m²•°C/ (W•25mm) -4°C: 6 0.73 0.76 0.80 0.81 0.83 0.83 0.83
4°C: 6 0.69 0.73 0.76 0.77 0.80 0.80 0.80
24°C: 0.65 0.66 0.70 0.71 0.74 0.74 0.75
Water Vapor Permeance4
Maximum @ 1" thick 		perm 5.0 3.5 3.5 3.3 2.3 2.3 2.3 ASTM E96 desiccant
ng/(Pa•s•m²) 287 201 201 190 132 132 132
Water Absorption5
Maximum		 % by
volume		 USA 4 3 3 3 2 2 2 ASTM C272, 1 day
Canada 6 6 4 4 2     ASTM D2842, 4 days
Flexural Strength
Minimum		 psi 25 30 35 40 50 60 75 ASTM C203
Proc.B
kPa 172 208 240 280 345 414 517
Density6,7 Nominal6 lbs/ft³ 1 1¼ 1½ 1.6 2 2½ 3 ASTM D1622
Minimum7 kg/m³ 14.4 18.4 21.6 23.3 28.8 38.4 48

¹ The test methods used to determine the 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 The elastic limit is between 1% and 2% strain. Compressive resistances at 10% strain are provided for applications where the intended end-use can tolerate plastic (permanent) deformation under load.  ³ R means resistance to heat flow. The higher the R-value, the greater the insulating power.  4 Values are for 1 inch or 25mm thick samples with natural skins intact. Better values will result for thicker materials.  5 The lab-test methods for water absorption use complete submersion under a head of water for 24 or 96 hours, so the values are applicable to specific design requirements only when the end-use conditions are similar to test method requirements.  6 not part of all the industry consensus standards (ASTM C578, CAN/ULC-S701) and provided AS-IS solely for informational purposes.  7 Minimum Density only applicable to USA-bound products per ASTM C578 (not Canada-bound products per CAN/ULC-S701).

The Canadian CAN/ULC-S701.1 "Standard for Thermal Insulation, Polystyrene, Boards and Pipe Covering" provides material properties of various EPS Types:

Property1 Units CAN/ULC-S701.1 Types ASTM Test
1
2
3
Compressive Resistance
Minimum @ 10% Deformation		 kPa 70 110 140 D1621
Proc.A
psi 10 16 20
Thermal Resistance2
RSI / 25mm thickness
Minimum @ 24°C		 m²•°C/ (W•25mm)0.650.700.74 C518
Thermal Resistance
R-Value / inch thickness
Minimum @ 75°F		 ft²•hr•°F/ (BTU•in)3.754.044.27 C518
Flexural Strength
Minimum		 kPa 170 240 300 C203
Proc.B
psi 25 35 44
Water Vapor Permeance2
Maximum at 25mm thickness		ng/(Pa•s•m²)300200130 E96
perms5.2 3.52.3
Water Absorption3
Maximum		 % by
volume		 6.0 4.0 2.0 D2842
Dimensional Stability % linear
change max.		1.51.51.5 D2126 7 Days
@ 70±2°C
Limiting Oxygen Index % min.242424 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.

The American ASTM C578 "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation" provides material properties of various EPS Types:

Property Units ASTM C578 Types ASTM Test
I VIII II IX XIV XV
Compressive Resistance²
Minimum @ 10% Deformation		 psi 10 13 15 25 40 60 D1621
Proc.A
kPa 69 90 104 173 276 414
Thermal Resistance1,2,3
R-value / inch thickness
Minimum @ 75°F [24°C]		 ft²•hr•°F/ (BTU•in) 3.6 3.8 4.0 4.2 4.2 4.3 C518
Flexural Strength²
Minimum		 psi 25 30 35 50 60 75 C203
Proc.B
kPa 173 208 270 345 414 517
Water Vapor Permeance1,2
Maximum @ 1 inch [25.4mm] thick		 perms 5.0 3.5 3.5 2.5 2.5 2.5 E96
ng/(Pa•s•m²) 287 201 201 143 143 143
Water Absorption2,4
Maximum		 % by
volume		 4 3 3 2 2 2 C272
Dimensional Stability² % linear
change max.		 2 2 2 2 2 2 D2126 7 Days
@ 70±2°C
Limiting Oxygen Index² % min. 24 24 24 24 24 24 D2863
Density - Nominal lbs/ft³ (PCF) 1 1¼ 1½ 2 2½ 3  
Density²
Minimum		 lbs/ft³ (PCF) 0.9 1.15 1.35 1.8 2.4 3.0 C303 or D1622
kg/m³ 14.4 18.4 21.6 28.8 38.4 48
Thermal Resistance at Additional Mean Temperatures1,2,3 C518
R-value / inch thickness
Minimum ft²•hr•°F/ (BTU•in)		 @ 40°F [4.4°C] 4.0 4.2 4.4 4.6 4.6  
@ 25°F [-4°C] 4.2 4.4 4.6 4.8 4.8  

¹ Values are for 1 inch [25.4mm] thick samples with natural skins intact. Better values will result for thicker materials.  ² 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. ³ R means resistance to heat flow. The higher the R-value, the greater the insulating power. 4 The lab-test method for water absorption uses complete submersion under a 1-inch head of water for 24 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) has no nutritional value for organisms and resists mold & fungi growth per ASTM C1338. To protect against animals place adequate physical barriers such as bug-screens or membranes around 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 per ASTM D696
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.   USA Class A (NFPA 101), ASTM E84 (UL 723)ª: Flame Spread Index ≤25, Smoke-Developed Index ≤450 up to 6" thick
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

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.

Material Properties of Korolite® Graphite-enhanced EPS (GPS) Insulation Types
Property¹ Units Korolite® GPS Types Test Std.
G100 G130 G160 G200 G250
Third-Party Certified Type Canada 1 1+ 2 2+ 3 CAN/ULC-S701.1
USA I VIII II II+ IX ASTM C578, ICC-ES AC12
Compressive Resistance2
Minimum @ 10% Deformation psi 10 13 16 20 25 ASTM D1621
Proc.A
kPa 70 90 110 140 172
Thermal Resistance3,4 Typical at mean temperatures of:
R-value/inch
thickness		 ft²•hr•°F/ (BTU•in) 40°F: 6 4.9 4.9 4.9 4.9 4.9 ASTM C518
or C177
75°F: 4.7 4.7 4.7 4.7 4.7
RSI / 25mm
thickness		 m²•°C/ (W•25mm) 4°C: 6 0.85 0.85 0.85 0.85 0.85
24°C: 0.815 0.815 0.815 0.815 0.815
Water Vapor Permeance4
Maximum @ 1" thick 		perm 5.0 3.5 3.5 3.3 2.3 ASTM E96 desiccant
ng/(Pa•s•m²) 287 201 201 190 132
Water Absorption5
Maximum		 % by
volume		 USA 4 3 3 3 2 ASTM C272, 1 day
Canada 6 6 4 4 2 ASTM D2842, 4 days
Flexural Strength
Minimum		 psi 25 30 35 40 50 ASTM C203
Proc.B
kPa 172 208 240 280 345
Density6,7 Nominal6 lbs/ft³ 1 1¼ 1½ 1.6 2 ASTM D1622
Minimum7 kg/m³ 14.4 18.4 21.6 23.3 28.8

1 The test methods used to determine the 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 The elastic limit is between 1% and 2% strain. Compressive resistances at 10% strain are provided for applications where the intended end-use can tolerate plastic (permanent) deformation under load.  3 R means resistance to heat flow. The higher the R-value, the greater the insulating power.  4 Values are for 1 inch or 25mm thick samples with natural skins intact. Better values will result for thicker materials.  5 The lab-test methods for water absorption use complete submersion under a head of water for 24 or 96 hours, so the values are applicable to specific design requirements only when the end-use conditions are similar to test method requirements.  6 not part of all the industry consensus standards (ASTM C578, CAN/ULC-S701) and provided AS-IS solely for informational purposes.  7 Minimum Density only applicable to USA-bound products per ASTM C578 (not Canada-bound products per CAN/ULC-S701.1).

Additional Properties of GPS

Graphite-enhanced expanded polystyrene (GPS) has no nutritional value for organisms and resists mold & fungi growth per ASTM C1338. To protect against animals place adequate physical barriers such as bug-screens or membranes around GPS.
Deformation due to Thermal Radiation: unprotected, gray GPS will deform when exposed to direct or reflected sunlight or other radiant heat sources. Keep GPS covered using opaque tarp, reflective covers or suitable indoor storage until finishes are installed.
Max. Service Temperature: Long-Term Exposure 74°C [165°F], Intermittent Exposure 79°C [175°F]
Thermal Expansion coefficient: 5-7•10-5/°K per ASTM D696
Solubility: Insoluble in water and in general chemically inert. GPS dissolves in hydrocarbons (e.g. fuels, oils, tar), organic solvents (e.g. acetone/ketones, benzene, paint thinner), ethers, esters, aldehydes and amines. Capillarity: None
Surface Burning Characteristics Canada CAN/ULC-S102.2: Flame-Spread Rating ≤295, Smoke Developed Classification over 500.   USA Class A (NFPA 101), ASTM E84 (UL 723)ª: Flame Spread Index ≤25, Smoke-Developed Index ≤450 up to 6" thick
Limiting Oxygen Index: min. 24% per ASTM D2863. Airfoam's GPS for construction applications contains a polymeric (non-HBCD) fire retardant modifier.
CAUTION: GPS 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

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.

Specify & Install

Korolite® Types Overview White Expanded Polystyrene (EPS) Gray, Graphite-enhanced EPS (GPS) New

White Korolite® EPS Specifications 100 Types 1, I 130 Types 1+, VIII 160 Types 2, II 200 Types 2+, II+ 250 Types 3, IX 400 Type XIV 600 Type XV
For Tilt-Up with Grid Marks 200 Types 2+, II+ 250 Types 3, IX

Korolite® Installation Guide 30-Year Limited Warranty Environmental Product Declaration Shallow Foundations EPS over Metal Decking

Intertek

Materials:

Code Evaluation Report Thermal Insulation CAN/ULC-S701.1, ASTM C578, ICC-ES AC12 with Surface Burning Characteristics CAN/ULC-S102.2, ASTM E84 (UL 723). Intertek Listed & Inspected

Wall Assemblies:

¾ Hour Fire Rating for a Composite Wall Assembly with EPS c.i. CAN/ULC-S101, ASTM E119

Meets NFPA 285 with specific limitations for an Exterior Wall Assembly with EPS c.i.

Underwriters Laboratories

Materials:

BRYX.R7726 - Foamed Plastic Surface Burning Characteristics ANSI/UL 723
CDET7.R19427 - Rigid Roof Insulation Fire Resistance Ratings CAN/ULC-S101
TGYVC.R19427 - Roof Deck Construction Materials Fire Spread Under Roof Deck Assemblies CAN/ULC-S126

Roof Assemblies:

CAN/ULC-S126 Roof Deck Construction Designs C7, C12A, C12B, C38
CAN/ULC-S101 & ANSI/UL 263 Roof Fire-Resistance Ratings Designs R210, R222, P225, P230, P231, P235, P259, P404, P509, P701, P742, P810, P902, P904, P905, P909, P910, P912, P913, P915, P916, P919, P920, P922, P926, P942