Compacfoam

Compacfoam

Compacfoam is a strong, lightweight, and rigid insulation material made from thermoplastic polystyrene foam. It delivers excellent thermal performance and durability, ideal for construction and industrial uses. With its closed-cell structure, Compacform resists moisture and retains insulation efficiency, providing an eco-friendly, reliable solution for energy-efficient applications.

Suited to

Support for door thresholds and window installation, where it is important to minimise thermal bridging.

Thermal conductivity

0.046 W/m.K and Density: 200 kg/m3

Thermal conductivity = 0.046 W/mK

Average stress at 5%: 2.56 N/mm2

Average stress at 2%: 1.91 N/mm2

Key features of Compacfoam

Strong and secure fixing

High compressive strength with excellent screw pull-out resistance

On-site friendly

Easy to cut, drill, and shape — ideal for on‑site adjustments.

Thermal performance

Thermal conductivity: 0.046 W/m·K

Sustainable choice

Eco‑friendly, reusable, and recyclable.

Moisture protection

Moisture‑resistant thanks to its closed‑cell design

Fire safety rated

Fire classification: Euroclass E (EN 13501)

Applications of Compacfoam

Compacfoam supports a wide range of applications where structural support and the possibility of obtaining secure fixings into the material are required.

* Can be used as a replacement for timber battens in these applications, where thermal bridging is to be reduced

* High compressive strength with good screw pull-out resistance and easy to drill & saw

* Available with Parabond 600, a fast curing, elastic white adhesive with high initial bonding strength suitable for securing Compacfoam to building materials and itself

* Thermal insulation for window and door thresholds

* Support for window and door frames to reduce thermal bridging

* Fixing points in external wall insulation systems (EWI) — e.g., for downpipes and fixtures.

Compacfoam

Easy to install and adapt on‑site

Compacfoam can be easily processed with saw blades featuring large tooth spacing or milling blades, which prevent melting during cutting. It's also compatible with Parabond 600 - a fast-curing, elastic adhesive that offers strong intial bonding for secure attachment to building materials and other Compacfoam components.

Available sizes

* 100 x 150mm x 970mm

* 100 x 75mm x 970mm

* 100 x 50mm x 970mm

* 100 x 20mm x 970mm

Other dimensions are available by special order.

Compacfoam

Technical specifications

  • Modulus of elasticity in linear-elastic range (E-Module): 102 N/mm2
  • Recommended stress level (under service load): 1.01 N/mm2
  • Water vapour diffusion resistance factor: 25
  • Maximum water absorptive capacity during complete submersion: 5-10%
  • Material behaviour in response to fire, according to EN 13501: Euroclass E
  • Elongation at maximum force (maximum strain at failure load): >10%
  • Final creep rate (anticipated long-term deformation at serviceability limit state: <3%

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Visit the 21 Degrees online store to browse our full range of Compacfoam and airtightness products.

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