Construction - Construction materials - Thermal insulation materials - Expanded polystyrene

Expanded polystyrene is a lightweight and effective thermal insulation material that is widely used for building insulation, especially in facades, foundations, floors and roofs. It is made of a polystyrene granule structure with air entrapped, which provides high thermal insulation efficiency. Expanded polystyrene is available in two main types – white EPS (expanded polystyrene foam) and blue or pink XPS (extruded polystyrene foam), which differ in density, strength and moisture absorption properties.

EPS is a lightweight, flexible and cost-effective material that is well suited for wall and ceiling insulation. XPS, on the other hand, is denser, has lower water absorption and greater mechanical strength, making it ideal for foundations, floors and humid environments. Both materials are resistant to mold, pests and long-term operation.

The main advantages of expanded polystyrene are its low thermal conductivity, low weight and easy installation. It does not require special tools and adapts easily to various surfaces. However, this material is flammable, so fire-resistant versions with flame retardants are often used in building insulation. Also, expanded polystyrene is sensitive to some chemical solvents and prolonged exposure to UV rays, so it is usually covered with protective materials.

What is the difference between EPS and XPS expanded polystyrene, and where is each used?

Is expanded polystyrene moisture-resistant and suitable for foundation insulation?

How to properly install expanded polystyrene to ensure maximum insulation effect?

Is expanded polystyrene a fire-resistant material?

What is the thermal conductivity and efficiency of expanded polystyrene compared to other insulation materials?

How long does expanded polystyrene thermal insulation last, and is it environmentally friendly?