EPS 100
EN 13163 EPS100
EPS 100 is an expanded polystyrene bead foam to EN 13163 rated at 100 kPa compressive strength, with nominal density 0.021 g/cm³ (21 kg/m³) and thermal conductivity 0.036 W/m·K.
Reference datasheet — EPS 100 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the WHITE-FR condition
EPS 100 grades and fills
EPS 100 is supplied in 3 conditions, soft to hard. WHITE-FR is the default FabDigit quotes; the values on this page are for it.
Compare all 3 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
IR-absorber (graphite) loaded EPS 100 | Pick when the same 100 kPa strength is needed with ~15 % lower λ or thinner build-up (Neopor-type beads). | 0.23 | 1.6 | ||
WHITE-FRDefault standard flame-retarded white EPS 100 board | Default construction grade: standard white FR beads, λ ≈ 0.036 W/m·K, for floors, rafts and roofs. | 0.25 | 1.8 | ||
Packaging / non-building EPS 100 | Only for packaging, void formers and civil fill where no reaction-to-fire class is required. | 0.25 | 1.8 |
Supply forms, finishes and certifications
Ways EPS 100 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
BLOCK-CUT | Block-cut board | Supply form |
MOULDED | Moulded board | Surface finish |
What is EPS 100?
EPS 100 is an expanded polystyrene bead foam to EN 13163 rated at 100 kPa compressive strength, with nominal density 0.021 g/cm³ (21 kg/m³) and thermal conductivity 0.036 W/m·K. It is the usual choice for floor insulation under moderate loads, and is available as flame-retardant white board, grey graphite-loaded board, non-FR stock, block-cut sheet and shape-moulded parts. It has no UV or solvent resistance and must be covered by screed, render or a facing; solvent-borne primers and bitumen will attack it. Use EPS 80 for low-load wall insulation or EPS 150 where the compressive class must rise. EPS 100 has a density of 0.02 g/cm³ (7.59×10⁻⁴ lb/in³), lighter than 97% of polymer grades. Its glass-transition temperature is 100°C (212 °F). EPS 100 has a tensile strength of 0.25 MPa (0.0363 ksi), weaker than 95% of polymer grades. Elongation at break is 1.8% and the elastic modulus is 0.01 GPa (9.43×10⁻⁴ Msi).
What is EPS 100 used for?
- Floor insulation
- Flat roof insulation
- Light traffic areas
Advantages
- Easy to machine — 95/100, better than 100% of polymer grades
- Lightweight — 0.02 g/cm³ (7.59×10⁻⁴ lb/in³), better than 97% of polymer grades
- Low embodied carbon — 3.3 kg CO₂/kg, better than 78% of polymer grades
Limitations
- Degrades in UV without stabilisers — 12/100, worse than 99% of polymer grades
- Limited ductility — 1.8%, worse than 97% of polymer grades
- Needs corrosion protection — 55/100, worse than 94% of polymer grades
- Poor heat conductor — 0.04 W/m·K (0.0208 BTU/hr·ft·°F), worse than 92% of polymer grades
- Low stiffness — 0.01 GPa (9.43×10⁻⁴ Msi), worse than 85% of polymer grades
EPS 100 properties
Typical room-temperature values for EPS 100-WHITE-FR; bars are the position among polymer grades.
Physical4
EPS 100 has a density of 0.02 g/cm³ (7.59×10⁻⁴ lb/in³), lighter than 97% of polymer grades. Its glass-transition temperature is 100°C (212 °F).
Mechanical10
EPS 100 has a tensile strength of 0.25 MPa (0.0363 ksi), weaker than 95% of polymer grades. Elongation at break is 1.8% and the elastic modulus is 0.01 GPa (9.43×10⁻⁴ Msi).
Thermal8
EPS 100 is rated for continuous service to 75°C (167 °F). It conducts heat at 0.04 W/m·K (0.0208 BTU/hr·ft·°F), worse than 92% of polymer grades. Thermal expansion is 65 µm/m·K (36.1 µin/in·°F).
Electrical3
EPS 100 has an electrical resistivity of 1×10¹⁴ Ω·m.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 94% of polymer grades. UV resistance is not recommended.
Sustainability4
Producing a kilogram of EPS 100 takes about 100 MJ of energy and emits 3.3 kg of CO₂ — less than 61% of polymer grades. Typical recycled content is 5%.
Manufacturability4
EPS 100's machinability is excellent (95/100, better than 100% of polymer grades); weldability poor (25/100); formability poor (15/100).
Common Calculations4
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the polymer family
Yield strength against density for every polymer grade FabDigit runs. EPS 100 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with EPS 100
Is EPS 100 easy to machine?
Cut with hot wire, fine-tooth band saw or CNC router at high feed; use dust/static extraction and avoid solvent-based coolants.
Can EPS 100 be welded?
No fusion welding — join with hot-plate/steam fusion in the mould or with water-based/EPS-safe adhesives and mechanical fixings.
Can EPS 100 be formed, bent or molded?
Made by pre-expanding EPS beads with steam (~100–110 °C), ageing, then block or shape moulding at 0.6–1.0 bar steam; drying and 3–7 day ageing needed before cutting to control shrinkage.
EPS 100 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)decays after ageing; fire precaution during storage of fresh beads | 0.1 – 1.5 | 0.5 |
| polymeric brominated flame retardant (PoFR construction grades only; replaced HBCD in EU since 2015 | 0.3 – 1.2 | 0.7 |
| graphite (IR absorber)grey/graphite-enhanced variant only | 0 – 4 | 2 |
| processing additives (nucleant, antistat | 0 – 0.5 | 0.2 |
| polystyrene (styrene homopolymer)solid phase; foam is ~97–98 vol % air | ≥ 94 (balance) |
What surface finishes work on EPS 100?
Compatible with cement/polymer-modified renders, EIFS mesh coats and water-based paints; never use solvent-based bitumen, petrol-thinned primers or PU with high solvent load.
Equivalent designations
Standards and trade names that resolve to EPS 100 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 13163 EPS100
How much does EPS 100 cost?
EPS 100 is a standard-cost polymer ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
EPS 100 — frequently asked
What is EPS 100 used for?
EPS 100 is typically used for floor insulation, flat roof insulation and light traffic areas. In short: standard floor-insulation EPS; 100 kPa load class; grey graphite option available.
What is the tensile strength of EPS 100?
EPS 100 has a typical tensile strength of 0.25 MPa (0.0363 ksi) — weaker than 95% of polymer grades. Strength varies by condition: see the 3 listed tempers.
Is EPS 100 easy to machine?
Yes — machinability is rated excellent (95/100, better than 100% of polymer grades). Cut with hot wire, fine-tooth band saw or CNC router at high feed; use dust/static extraction and avoid solvent-based coolants.
Can EPS 100 be welded?
Not readily — weldability is rated poor (25/100). No fusion welding — join with hot-plate/steam fusion in the mould or with water-based/EPS-safe adhesives and mechanical fixings.
What surface finishes work on EPS 100?
Compatible with cement/polymer-modified renders, EIFS mesh coats and water-based paints; never use solvent-based bitumen, petrol-thinned primers or PU with high solvent load.
Can EPS 100 be formed, bent or molded?
Made by pre-expanding EPS beads with steam (~100–110 °C), ageing, then block or shape moulding at 0.6–1.0 bar steam; drying and 3–7 day ageing needed before cutting to control shrinkage.
What is the maximum service temperature of EPS 100?
EPS 100 is rated for continuous use to about 75°C (167 °F), and briefly to 85°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does EPS 100 cost?
EPS 100 is a standard-cost polymer ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN 13163 — Thermal insulation products for buildings: factory made expanded polystyrene (EPS) — Specification — CEN (2016)
- EN 826 / EN 1607 / EN 12089 / EN 12087 — Compression, tensile, bending and water absorption test methods for thermal insulation — CEN (2013)
- ASTM C578 — Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation — ASTM (2022)
- Styropor / Neopor technical information (bead grades, λ and density tables) — BASF (2022)
- EUMEPS EPS technical guidance and product declarations — EUMEPS (2021)
- EN ISO 10456 design thermal values for building materials — ISO (2007)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.