Walls

The external walls of a building function as a climate shield. They protect against cold, precipitation, strong winds, noise and fire. A good external wall structure, with the right insulation solution, is a prerequisite for a healthy and pleasant indoor climate.

We have excellent insulation solutions for different kind of walls; rendered facades, ventilated facades, massive walls, cellar walls, sandwich panels and partitions. The below section of this site contains the most common wall insulation solutions for buildings. Choose your wall type to find the PAROC product you need.


Thermal insulation rendering system can be used on various supporting walls, including brick, block, concrete timber and steel. Paroc insulation solutions for rendered facades are designed to meet the following standards and guidelines; 

  1. ETAG 004: External Thermal Insulation Composite Systems with Rendering
  2. ETAG 014: Plastic anchors for Fixing External Thermal Insulation Composite Systems to Rendering
  3. EN 13500: Thermal Insulation Products for Buildings – External Thermal Insulation Systems (ETICS) based on Mineral Wool – Specification

Based on these standards and guidelines, every system owner can apply for ETA (European Technical Approval).

Ventilated facades have four components: supporting structure, thermal insulation, wind protection, and the external surface to provide weather protection and create an appealing visual effect.

When layering external walls, place a ventilation air gap between the wind protection layer and the external facade.

The thermal insulation of the ventilated wall should be impervious to external moisture, wind and sound and be highly resistant to fire. It should also convey internal moisture to the outside. In addition, especially in colder climates, the insulation should minimise or even eliminate the effect of cold bridges caused by components (such as concrete, steel or wooden studs) that pass through the various layers of the wall structure.

PAROC stone wool is an effective solution to the challenges of layered external walls. With a broad range of products and structural configurations, Paroc can help you find the right insulation for any climate or building. PAROC stone wool is non-combustible and has good elasticity, compressive strength and sound absorption properties.

Heat loss from basements or cellars accounts for a significant portion of a building’s energy loss. Because basements are mostly located below ground level, they are cool and damp. In many cases, homeowners with basements want to utilise the basement area for additional living space.

A properly sealed, insulated, and moisture-protected basement increases living comfort, saves on energy costs, improves durability, and reduces the entry of moisture into the building. There are three ways to insulate a basement wall: on the interior, on the exterior or in the middle. Below you can find Paroc solutions for internal and external insulation of basement walls.
Partitions are inner walls that divide bigger spaces into smaller rooms. They stop sound and the spread of fire spread between different spaces.

Lightweight partitions are usually the most cost efficient way to build up an inner wall. The mass of the wall produces good sound insulation, so create it with air-tight plaster board surface layers combined with a soft and porous absorbent core of stone wool.

Paroc has been granted European technical approval (ETA) for partitions. To get ETA, test every related building part needs testing. For this reason, it was necessary to limit the amount of solutions tested. The approval is based on the fire tests made by ITB in Warsaw, Poland and on the sound tests by VTT in Espoo, Finland. The certificate is based on the common European regulations described in ETAG 003.

To cover the sound insulation properties of additional building parts, we have a statement by VTT Technical Research Centre of Finland. The figures for each building part are based on calculations that take into account the ability to produce partitions on site. There are safety margins added to the values, but it is possible to use the figures for designing.

In designing renovations, follow the same principles as for new buildings. The usage of space will change. New rooms might require better sound and fire classification than partitions have had in the past. Regardless of the old partition structure, fire and sound classification can be upgraded to a certain extent with non-combustible and sound absorbing stone wool insulation and plaster boards.
Ventilated facades are suitable for both new buildings and renovations. Regardless of the old building part and construction method, the old, worn-out facade can be pulled down and replaced with a new, more effective insulation layer, wind protection and facade.

Porous stone wool is safe to use as external wall insulation. The new porous insulation layer increases the temperature of the structure and allows the old building part to dry. Non-combustible stone wool also gives the old structure a better fire classification.
Many log and brick houses need an energy efficiency renovation. When correctly installed, additional insulation eliminates draughts in old log houses and cuts energy costs. At the same time, it upgrades the fire safety of the building.
To renovate your basement into a living space, the height has to be sufficient. But even if the room height isn’t right for a living space, basements can be converted into saunas or hobby areas. Remember that converting a cold basement into living space requires a permit. Before starting your project, contact a local building inspector.