THERMOMAX® EPS
THERMOMAX® EPS is an expanded polystyrene insulation board used for thermal insulation on vertical and horizontal surfaces of buildings. Its closed-cell structure provides a low thermal conductivity and high dimensional stability; no gases harmful to people or the environment are used in its production.
It complies with EN 13163 and is produced in four compressive strength classes: EPS 50, EPS 90, EPS 120 and EPS 200.
Fields of Application
• External thermal insulation composite systems (ETICS)
• Thermal insulation of trafficked and non-trafficked roofs
• Loft spaces and roof compartments
• Thermal insulation of floors, under screed and ceilings
• Thermal insulation of cold storage rooms
• As a protective layer on concrete surfaces
Application Area – Type Selection
The table below shows the suitable THERMOMAX® EPS type for each application area together with the property governing the selection. The final type and thickness must be determined according to the thermal calculation and load values of the specific project.
|
Application area |
EPS 50 |
EPS 90 |
EPS 120 |
EPS 200 |
Governing property |
|
External wall insulation (ETICS) |
● |
● |
● |
○ |
Tensile strength perpendicular to faces EN 1607 ≥ 100 kPa (TR100) |
|
Non-trafficked roof, loft space, warm roof |
● |
● |
○ |
– |
Thermal conductivity (λD) |
|
Basement / garage ceiling insulation |
● |
● |
○ |
– |
Thermal conductivity (λD) |
|
Floor insulation under screed (residential, foot traffic) |
○ |
● |
● |
○ |
Compressive stress CS(10) |
|
Trafficked terrace roof (under screed) |
– |
○ |
● |
● |
Compressive stress and creep (EN 1606) |
|
Industrial floor, under vehicle load |
– |
– |
○ |
● |
Compressive stress and creep (EN 1606) |
|
Cold storage room |
– |
– |
● |
● |
Water absorption WL(T)3 and compressive stress |
|
Foundation / external wall below grade, soil contact |
○ |
○ |
● |
● |
Water absorption |
|
Protective layer on concrete (no permanent load) |
● |
● |
● |
● |
Thickness and dimensional stability |
• Recommended ○ May be used depending on the project – Not recommended
• In external thermal insulation composite systems the governing property is not compressive stress but tensile strength perpendicular to the faces (EN 1607).
• Under permanent load, to keep deformation within 2% over a 50-year service life, the permanent load should not exceed approximately 30% of the CS(10) value (EN 1606).
• In cold storage rooms a vapour barrier must be applied on the warm side of the insulation.
Advantages
• Approximately 98% of its volume consists of still air, providing high thermal insulation performance
• Lightweight; adds no load to the structure
• High dimensional stability; retains its shape
• Easy to cut and install, saving labour
• Water vapour permeable; reduces the risk of condensation when used in adequate thickness
• Does not rot or grow mould; retains its physical properties over a long period
|
Property |
Unit |
EPS 50 |
EPS 90 |
EPS 120 |
EPS 200 |
|
General Information |
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|
Material composition |
– |
Expanded polystyrene (EPS) |
|||
|
Appearance |
– |
White, cut board |
|||
|
Average density (approx.) |
kg/m³ |
16 |
20 |
24 |
30 |
|
Board size |
cm |
50 × 100 |
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|
Board thickness |
cm |
2 – 3 – 4 – 5 – 6 – 8 – 10 |
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|
Thermal Properties |
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|
Thermal conductivity (λD – EN 12667) |
W/mK |
0.039 |
0.037 |
0.036 |
0.033 |
|
Service temperature |
°C |
−50°C / +75°C |
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|
Mechanical Properties |
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|
Compressive stress at 10% deformation (EN 826) |
kPa |
≥ 50 CS(10)50 |
≥ 90 CS(10)90 |
≥ 120 CS(10)120 |
≥ 200 CS(10)200 |
|
Tensile strength perpendicular to faces (EN 1607) |
kPa |
≥ 190 TR150 |
≥ 190 TR150 |
≥ 265 TR250 |
≥ 305 TR300 |
|
Bending strength (EN 12089) |
kPa |
≥ 190 BS150 |
≥ 240 BS200 |
≥ 335 BS300 |
≥ 475 BS450 |
|
Dimensional Tolerances and Stability |
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|
Length tolerance (EN 822) |
mm |
± 2 (L2) |
|||
|
Width tolerance (EN 822) |
mm |
± 2 (W2) |
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|
Thickness tolerance (EN 823) |
mm |
± 1 (T2) |
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|
Squareness tolerance (EN 824) |
mm/m |
± 2 (S2) |
|||
|
Flatness tolerance (EN 825) |
mm |
5 (P4) |
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|
Dimensional stability, 23°C / 50% RH (EN 1603) |
% |
± 0.2 — DS(N)2 |
|||
|
Dimensional stability, 48 hours / 70°C (EN 1604) |
% |
≤ 1 — DS(70,-)1 |
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|
Water and Water Vapour Properties |
|||||
|
Long-term water absorption by immersion (EN 12087) |
vol. % |
≤ 5.0 — WL(T)5 |
≤ 3.0 — WL(T)3 |
||
|
Water vapour diffusion resistance factor (EN 12086) |
μ |
20 – 40 |
30 – 70 |
30 – 70 |
30 – 70 |
|
Safety Information |
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|
Reaction to fire class (EN 13501-1) |
– |
Class E |
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|
Hazardous substances |
– |
Refer to SDS |
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The technical values stated were obtained at an ambient temperature of +23°C and 50% relative humidity.