Frequently asked questions about sandwich panels in construction

It is a prefabricated construction element formed by two steel sheets (interior and exterior) that protect a high-density insulating core. This core is usually made of polyurethane (pur), polyisocyanurate (pir) or rock wool. Its main feature is to offer high mechanical strength and thermal insulation with a very low weight.

There are four main categories adapted to every need:

• Covering: with fretwork to drain rain and withstand snow loads.

• Facade: smooth or profiled, for exterior and interior walls.

• Refrigerator: with watertight seals and greater thickness to maintain the cold.

• Rock wool: with mineral core for acoustic insulation and fire resistance.

Thanks to its versatility, it is used both in industry and in housing:

• Industrial warehouses and logistics centers.

• Porches, garages and residential extensions.

• Cold rooms and clean rooms.

• Restoration of old roofs without removing the original structure.

The final cost varies according to three key factors: the thickness of the insulating core (the thicker the core, the higher the price), the finish of the sheets (standard colors or imitation wood and tile) and the total number of meters to be installed. It is a very competitive material due to the savings it generates in labor and structure.

It is a dry construction system, fast and clean. The panels are joined by means of a tongue and groove system that guarantees watertightness and are fastened directly to the structure (metal, wood or concrete) by means of specific self-drilling screws. No drying time is required.

It is one of the most efficient insulators on the market. For reference, a 50 mm thick panel offers an insulation capacity equivalent to a concrete wall more than 70 cm thick, guaranteeing immediate energy savings in air conditioning.

Commercial thicknesses range from 30 mm to 200 mm:

• 30 to 50 mm: basic enclosures and buildings without demanding air conditioning.

• 60 to 100 mm: homes, offices and temperature-controlled spaces.

• 120 to 200 mm: freezing and deep-freezing chambers.