Characteristics of expanded polystyrene (EPS) thermal insulation boards

Expanded polystyrene or so-called Styrofoam is an artificial polymer with an open lattice structure of air-filled spherical particles. Over 95% of its volume is air enclosed in spheres of the polymer lattice. It offers very good thermal insulation properties with good strength, minimal deformability, limited vapour permeability, fire resistance (class B1).

The disadvantages of EPS compared to mineral wool are the result of its polymeric nature – although it is self-extinguishing, styrofoam is still flammable, it is not resistant to solar radiation and it does not offer the same sound insulation qualities.

EPS is available on the market in different densities and grain sizes. For external façade insulation, materials with higher density and smaller grain size are recommended because they have better thermal insulation properties (most often denoted EPS F). Low density materials are used for infill in various types of panel systems.

In addition to white styrofoam, there is also so-called graphite EPS. It is grey in colour and has significantly better thermal insulation properties compared to white styrofoam. This is due to the graphite beads included in its composition – as a natural mineral, graphite has the property to reflect and scatter radiation.

EPS is used in a wide range of applications including: building insulation, packaging, refrigeration and heating systems, swimming pools, boats, and much more.

EPS expanden polystyrene production method

Expanded polystyrene (EPS) is made from small beads of polystyrene which, when heat or steam is applied, expand and fuse together. The expansion process causes the expanded beads to fuse together into irregular shapes, leaving small spaces or irregular gaps between the foam cells.

Advantages of Styrofoam EPS insulation boards

EPS boards are an excellent insulation option with various advantages. These are cost effective, an affordable insulation option that saves you money on heating in the long run! Extremely lightweight material making it easily portable, simple to install and easy to cut into any shape required. EPS has just as good thermal properties as some of the more expensive insulation materials. It will significantly improve the thermal performance of your property. Absorbs sound for good acoustic insulation, making it ideal for urban areas.

Reduce labour costs

EPS insulation comes in a variety of forms that allow for minimal roof modifications and faster installation of multiple insulation layers.
This reduces labour time for roof installation by up to 60%, resulting in significantly lower costs. This saves builders time and alleviates the shortage of skilled labour in construction.

The ease of installation of EPS makes it suitable for DIY projects, reducing the initial cost and complications of repairs.
From insulation kits for attics to those for garage doors and walls, EPS can be installed with basic tools anywhere improved insulation is needed.

This allows homeowners to begin energy efficiency improvements immediately while exploring other ways to reduce their home’s carbon footprint and maximize potential tax benefits.

EPS has an excellent R-value (measuring its ability to retain heat)

Although poly-insulation has a higher R-value than EPS under normal conditions, this value drops sharply at temperatures below 15°C.
On the other hand, the R-value of EPS is stable not only throughout its life cycle, but also with temperature changes, making it a better choice for areas with cold winters. Thus making it ideal for insulating walls, ceilings, floors and other building elements.

EPS is a very lightweight material, making it easy to transport and install. At the same time, it is also very strong and resistant to mechanical influences.

EPS reduces the time lost in changing materials, varying lead times and other complications that can arise when a project requires multiple materials.

Waterproof – EPS is a waterproof material, making it suitable for use in high humidity conditions.

Environmentally friendly – Expanded polystyrene is a 100% recyclable material, making it an environmentally friendly choice for insulation

Additional benefits:

EPS is resistant to mold and mildew.
EPS is non-combustible.
EPS is easy to handle and cut.
EPS is relatively inexpensive.

EPS is a versatile material with multiple benefits, making it a popular choice for a variety of applications.

Application of EPS insulation boards

Versatile and suitable for a range of insulation projects. An environmentally friendly and sustainable insulation option. Waterproof, with increased mould protection. EPS is a versatile material suitable for insulating roofs, walls, ceilings, floors of residential and public buildings.