EPS 25kg/m³
Insutech EPS 25 is a white medium-density expanded polystyrene foam sheet at a nominal density of 25 kg/m³.
Engineered for the job it protects.
Insutech EPS 25 is a white medium-density expanded polystyrene foam sheet at a nominal density of 25 kg/m³. Precision-cut from high-quality injection-moulded polystyrene blocks, it provides a step up in both mechanical strength and thermal efficiency — making it suitable for applications that experience greater physical loads, such as below-slab insulation, inverted roof systems, and perimeter foundation insulation.
Offering thermal conductivity of ≤ 0.034 W/mK and compressive strength of ≥ 150 kPa, Insutech EPS 25 delivers superior thermal resistance across a range of thicknesses — significantly limiting heat transfer, reducing energy demand, and lowering operating costs throughout the building’s lifecycle. Its dimensionally stable, moisture-resistant foam structure ensures lasting performance in service.
Board thickness: Available in 20 mm – 100 mm and can also be customized.
- Superior thermal insulation with ≤ 0.034 W/mK thermal conductivity
- Reduces electricity consumption and energy operating costs
- Reduces CO₂ emissions through superior insulating performance
- High compressive strength of ≥ 150 kPa for loaded applications
- Suitable for below-slab, inverted roof, and foundation insulation
- Prevents moisture infiltration in walls and ceilings
- Dimensionally stable under sustained loads
Technical Data
| Property | Code | Test Method | Unit | Result |
|---|---|---|---|---|
| Density | kg/m3 | 25 ± 5% | ||
| Thermal Conductivity | λD | EN 12667 | W/mK | 0.034 W/mK |
| Thermal Resistance (30 mm) | RD | EN 12667 | (m²K)/W | 0.88 |
| Thermal Resistance (40 mm) | RD | EN 12667 | (m²K)/W | 1.18 |
| Thermal Resistance (50 mm) | RD | EN 12667 | (m²K)/W | 1.47 |
| Thermal Resistance (60 mm) | RD | EN 12667 | (m²K)/W | 1.76 |
| Compressive Stress | CS(10/Y) | EN 826 | kPa | ≥ 150 kPa |
| Tensile Strength | TR | EN 1607 | kPa | ≥ 150 kPa |
| Bending Strength | BS | EN 12089 | kPa | ≥ 200 kPa |
| Dimensional Stability | DS(70)3 | EN 1604 | % | ≤ 3 |
| Specific Heat | EN 12524 | J/(kgK) | 1450 | |
| Water Vapour Diffusion | MU | EN 12086 | μ | 30–70 |
| Water Absorption (Immersion) | WL(T) | EN 12087 | % vol | ≤ 3 |
| Water Absorption (Diffusion) | WD(V) | EN 12088 | % vol | ≤ 3 |
| Max. Service Temperature | °C | 75 | ||
| Fire Rating | EN 13501-1 | Euroclass | E |
*Insutech reserves the right to modify product specifications, descriptions, and technical information at any time without prior notice.
Application, Step by Step.
Remove dust, grease and loose particles from the substrate so the insulation boards can sit completely flush against the prepared surface.
Measure carefully and cut the boards to size with a sharp blade or hot wire, keeping the edges square for tight and accurate joints.
Apply a compatible adhesive or fix mechanical fasteners appropriate to the substrate, following the specified coverage and spacing.
Position each board and press it firmly into place, butting boards tightly together and staggering the joints between rows for stability.
Close all joints and gaps with compatible tape or filler so the insulation layer forms one continuous, unbroken thermal envelope.
Apply the specified screed, render or cladding over the boards to protect the insulation and complete the build-up as designed.
