EPS 150 STD-FR
Grade · default condition
EN 13163 EPS150
STD-FR = standard white flame-retarded EPS 150 board
Default construction board: CE-marked EN 13163 EPS150 with polymeric brominated FR, for roofs, floors and walls.
Values for the STD-FR condition
Other EPS 150 grades and fills
EPS 150 is listed in 5 conditions; see the grade overview at EPS 150.
Compare all 5 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
STD-FRDefaultThis page Standard white flame-retarded EPS 150 board | Default construction board: CE-marked EN 13163 EPS150 with polymeric brominated FR, for roofs, floors and walls. | 0.15 | 0.3 | 2 | — |
graphite/IR-absorber enhanced grey EPS 150 | Pick when the same 150 kPa strength is needed at 8–12 % lower λ or thinner build-up; grey boards need shading during installation. | 0.15 | 0.29 | 1.8 | — |
Non-flame-retarded (packaging / industrial) EPS at 150 kPa strength | Cheaper FR-free beads for packaging, moulds, void formers and non-building uses where no fire class is required. | 0.15 | 0.3 | 2 | — |
Lightweight fill block equivalent | Large sawn blocks for embankment fill, bridge approaches and load reduction over utilities, specified by compressive resistance at 1 % and 10 % strain. | 0.16 | 0.32 | 2 | — |
perimeter / inverted-roof grade with reduced water uptake | Choose for below-grade and inverted-roof service: tighter fusion and grooved/skinned faces cut long-term water absorption and add drainage. | 0.17 | 0.33 | 2 | — |
What is EPS 150 STD-FR?
EPS 150 STD-FR is EPS 150 in the STD-FR grade — default construction board: CE-marked EN 13163 EPS150 with polymeric brominated FR, for roofs, floors and walls. EPS 150 STD-FR has a yield strength of 0.15 MPa (0.0218 ksi) and a tensile strength of 0.3 MPa (0.0435 ksi) — weaker than 99% of polymer grades. Elongation at break is 2% and the elastic modulus is 0.01 GPa (0.0013 Msi). EPS 150 STD-FR has a density of 0.03 g/cm³ (0.001 lb/in³), lighter than 96% of polymer grades. Its glass-transition temperature is 100°C (212 °F).
Advantages
- Lightweight — 0.03 g/cm³ (0.001 lb/in³), better than 96% of polymer grades
- Easy to machine — 88/100, better than 92% of polymer grades
- Low, predictable mold shrinkage — 0.4%, better than 82% of polymer grades
- Low embodied carbon — 3.3 kg CO₂/kg, better than 78% of polymer grades
Limitations
- Low strength — 0.15 MPa (0.0218 ksi), worse than 99% of polymer grades
- Degrades in UV without stabilisers — 12/100, worse than 99% of polymer grades
- Limited ductility — 2%, worse than 95% of polymer grades
- Poor heat conductor — 0.03 W/m·K (0.0191 BTU/hr·ft·°F), worse than 95% of polymer grades
- Needs corrosion protection — 58/100, worse than 92% of polymer grades
EPS 150 STD-FR properties
Typical room-temperature values for EPS 150 STD-FR; 20 are specific to this condition. Other listed values are EPS 150 reference data and may not represent this condition. Bars are the position among polymer grades.
Physical4
EPS 150 STD-FR has a density of 0.03 g/cm³ (0.001 lb/in³), lighter than 96% of polymer grades. Its glass-transition temperature is 100°C (212 °F).
Mechanical12
EPS 150 STD-FR has a yield strength of 0.15 MPa (0.0218 ksi) and a tensile strength of 0.3 MPa (0.0435 ksi) — weaker than 99% of polymer grades. Elongation at break is 2% and the elastic modulus is 0.01 GPa (0.0013 Msi).
Thermal9
EPS 150 STD-FR is rated for continuous service to 80°C (176 °F). It conducts heat at 0.03 W/m·K (0.0191 BTU/hr·ft·°F), worse than 95% of polymer grades. Thermal expansion is 65 µm/m·K (36.1 µin/in·°F).
Electrical4
EPS 150 STD-FR has an electrical resistivity of 1×10¹³ Ω·m.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 92% of polymer grades. UV resistance is not recommended.
Sustainability4
Producing a kilogram of EPS 150 STD-FR takes about 95 MJ of energy and emits 3.3 kg of CO₂ — less than 70% of polymer grades. Typical recycled content is 5%.
Manufacturability5
EPS 150 STD-FR's machinability is excellent (88/100, better than 92% of polymer grades); weldability fair (40/100); formability poor (25/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with EPS 150 STD-FR
Is EPS 150 easy to machine?
Cut with hot wire, hot knife or fine-tooth band saw; routing and CNC hot-wire shaping are easy but generate static-charged beads that need extraction.
Can EPS 150 be welded?
No true welding — blocks are fused in the steam mould; on site joints are butt/lap taped or bonded with solvent-free (water- or PU-based) adhesive, never solvent or hot bitumen.
Can EPS 150 be formed, bent or molded?
Pre-expand beads with steam, age in silos, then block- or shape-mould at ~105–125 °C steam; block density is set to hit the 150 kPa compressive class before sawing to boards.
What surface finishes work on EPS 150?
Faces take cement- or polymer-modified renders, EIFS/ETICS mesh coats, gypsum boards and factory-laminated facings; must be shielded from UV, solvents and temperatures above ~80 °C.
EPS 150 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| pentane (residual blowing agent)decreases with ageing/conditioning of blocks | 0.2 – 2 | 1 |
| polymeric brominated flame retardant (PoHBCD replaced since 2015; absent in NON-FR variant | 0.4 – 1.5 | 0.8 |
| graphite (IR absorber)GRAPHITE variant only | 0 – 4 | 2.5 |
| processing additives (nucleant, antistat | 0.05 – 0.5 | 0.2 |
| polystyrene (styrene homopolymer)solid polymer skeleton; foam is >95 vol % air | ≥ 94 (balance) | — |
EPS 150 STD-FR — frequently asked
What is EPS 150 STD-FR used for?
EPS 150 STD-FR is typically used for inverted roof insulation, parking area and deck insulation, loaded floor insulation under screed, perimeter and below-slab edge insulation, geofoam lightweight fill blocks and external wall insulation (ETICS) boards. In short: 150 kPa structural EPS class; lower lambda than EPS 100; geofoam-capable strength.
What is the yield strength of EPS 150 STD-FR?
EPS 150 STD-FR has a typical yield strength of 0.15 MPa (0.0218 ksi) and a tensile strength of 0.3 MPa (0.0435 ksi) — weaker than 99% of polymer grades. Strength varies by condition: see the 5 listed tempers.
Is EPS 150 STD-FR easy to machine?
Yes — machinability is rated excellent (88/100, better than 92% of polymer grades). Cut with hot wire, hot knife or fine-tooth band saw; routing and CNC hot-wire shaping are easy but generate static-charged beads that need extraction.
Can EPS 150 STD-FR be welded?
With care — weldability is rated fair (40/100). No true welding — blocks are fused in the steam mould; on site joints are butt/lap taped or bonded with solvent-free (water- or PU-based) adhesive, never solvent or hot bitumen.
What surface finishes work on EPS 150 STD-FR?
Faces take cement- or polymer-modified renders, EIFS/ETICS mesh coats, gypsum boards and factory-laminated facings; must be shielded from UV, solvents and temperatures above ~80 °C.
Can EPS 150 STD-FR be formed, bent or molded?
Pre-expand beads with steam, age in silos, then block- or shape-mould at ~105–125 °C steam; block density is set to hit the 150 kPa compressive class before sawing to boards.
What is the maximum service temperature of EPS 150 STD-FR?
EPS 150 STD-FR is rated for continuous use to about 80°C (176 °F), and briefly to 100°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between EPS 150 STD-FR and EPS 150 GEOFOAM?
STD-FR is the default condition — default construction board: CE-marked EN 13163 EPS150 with polymeric brominated FR, for roofs, floors and walls. GEOFOAM: large sawn blocks for embankment fill, bridge approaches and load reduction over utilities, specified by compressive resistance at 1 % and 10 % strain. Yield strength is 0.15 MPa in STD-FR versus 0.16 MPa in GEOFOAM.
Sources
- EN 13163 — Thermal insulation products for buildings: factory made expanded polystyrene (EPS) — CEN (2016)
- EN 14933 — Lightweight fill and thermal insulation products for civil engineering: EPS — CEN (2007)
- ASTM D6817 / ASTM C578 — Rigid cellular polystyrene geofoam and thermal insulation — ASTM (2021)
- Styropor / Neopor technical information (physical and mechanical property tables) — BASF (2020)
- EUMEPS EPS property and EPD compilations — EUMEPS (2022)
- ICE Inventory of Carbon & Energy v3 (EPS insulation) — Circular Ecology (2019)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.