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Insulating Apartment Residential Building

External walls need to retain heat inside the building in winter, prevent excessive solar heating in summer and reduce noise levels. As they have a principal role in the structural integrity of the building, external wall insulation needs to be applied without changing the fundamental wall itself. Knauf Insulation provides a wide range of solutions for various external wall types

3D Model Cavity Wall Insulation

Cavity wall insulation

Cavity walls consist of two layers of wall divided by a central cavity, with the inner wall supporting the building structure and the outer layer providing weatherproofing. The cavity itself provides excellent opportunities for insulation, such as the use of mineral wool slabs or rolls during the build, which can provide high levels of thermal and acoustic insulation when installed correctly

Renovation project? Read more on our blown wool solution

External Thermal Insulation Composite System 3D model

External Thermal Insulation Composite System (ETICS)

The External Thermal Insulation Composite System (ETICS) is designed to be fitted to the exterior of an existing wall to provide additional thermal and acoustic insulation for new builds and renovations. It improves both summer and winter comfort and does not require the sacrifice of internal space. Also known as a Contact Facade, it is suitable for use on houses, apartment blocks, office buildings and municipal properties.

How to Insulate a Building Using ETICS

ETICS is directly attached to the outside wall of a building or structure using adhesives, mechanical fasteners or a combination of the two. The insulation is then covered with a mesh and rendered. This makes it suitable for attachment to a wide variety of materials, such as rendered brick, concrete or prefabricated panels.

Fire safety from ETICS insulation

ETICS Rock Mineral Wool insulation is made of non-combustible materials, offering effective protection against the spread of fires across the facade whether installed across the entire surface of the building or used as fire barrier for polystyrene based cladding systems

Read more on fire safety

3D Timber Frame Wall Insulation UK

Frame wall insulation

Modern timber-framed walls have better thermal insulation properties compared to brick or concrete structures of equal thickness. Prevalent in modern construction, they present an opportunity to create energy efficient buildings, though care must be taken over noise and moisture management. Knauf Insulation supplies an array of high-efficiency thermal and acoustic insulation solutions to suit such frame wall applications. Mineral Wool, provided as rolls or slabs, is friction fit between timber studs, optimising the effectiveness of the materials in order to keep the heat inside the walls, rather than dispersed into them.

Read about our Supafil® solution

3D Drawing Internal Insulation External Wall Knauf

Internal insulation of an external wall

Some buildings, particularly older buildings and those with heritage protections, cannot have insulation easily applied from the outside or to cavity walls. When these options are not available or desirable, walls can be insulated from the inside by creating a substructure made of wood or metal and using mineral wool to affix it to the wall. The insulation material is clamped between the mounts on the substructure and affixed to the wall to create a more efficient building.

Finishing internal insulation

A vapour control layer (VCL) can then be applied directly on to the insulation or over the substructure before being finished with plasterboard.

Party Wall Insulation Rock Mineral Wool Slabs

Party wall insulation

Party walls form the connection between two neighbouring properties and, as such, soundproofing is a priority if you have loud neighbours. Poorly insulated party walls can cause disturbances and lead to undesired transfer of hot and cold air and noise between properties. It is essential that party walls are properly insulated, eliminating thermal and acoustic bridges. Glass Mineral Wool solutions from Knauf Insulation offer high levels of thermal and acoustic efficiency, as well as fire protection. Depending on the type of construction, insulation can be fitted when the wall is built or delivered as part of a prefabricated system wall, pre-insulated for installation. Blown Wool can be used to fill the cavity after the walls are constructed

Read more on our Supafil® solutions

Insulating Ventilated Facade With Wood Cladding

Ventilated facade insulation

A ventilated facade is an external wall construction comprising two layers – the insulation and the facade cladding. The gap between the two is open at the top and bottom, allowing natural ventilation of the facade. 

Ventilated facade construction offers a wide range of architectural expression, naturally cools the building during summer and reduces damp in the winter. Insulation is typically fixed to the wall using vertical or horizontal fixing rails. 

Types of ventilated facade

Closed-joint ventilated facade

This system allows to achieve a minimum joint size with the closed-joint system, sealing the joints using special aluminum sections, resulting in a very attractive, designer-look. This helps to create macro-ventilation in the façade’s air gap and makes it impossible for insects to get into the air gap. 


Open-joint ventilated facade

Increasingly popular, open joint cladding requires a different approach to closed-joint cladding to account for the increased exposure to UV and moisture. Knauf Insulation offers dedicated products coated with a protective black glass for use with open-joint cladding. 


Diagonal 2H Frame Overview
Building Featuring Curtain Walls Hotel Plaza Slovenia Knauf Insulation
Metal Cladding Wall Mineral Wool Insulation Knauf Ecose Technology Romania

Diagonal 2H system for ventilated facade insulation

Diagonal 2H from Knauf Insulation is a unique system that changes the shape of the insulation frames, improving accuracy and simplicity without compromising on standards or aesthetics. Diagonal 2H is suitable for new builds, renovations, brick and timber. This innovative solution creates highly efficient thermal insulation and a precise wind barrier using Glass Mineral Wool. 

Curtain walls VS ventilated facade

Unlike a ventilated façade, curtain walls typically consist of a proprietary, non-structural, lightweight frame, which in some cases is designed to incorporate glass panels that act as a weatherproof façade and also allow daylight to penetrate into the building. 

Curtain wall systems are usually designed with extruded aluminum components, although the first curtain walls were made of steel. The aluminum frame is usually filled with glass, which provides an architecturally pleasing building, as well as benefits such as daylighting.

Metal cladding (C cassette walls)

Cassette walls consist of a horizontal C-cassette and an external metal cladding. Insulation is placed only in the C-cassette or also in front of the cassette.  

The external cladding can be a horizontal or vertical cassette or any type of sheet metal. (profiled metal elements). They are primarily designed for industrial and commercial buildings (warehouses, logistics centres, production halls...). 

How To Logo Light Bulb

How to install Ventilated Facade Insulation

Gaps in insulation can increase thermal transmittance by up to 50%. Insulation should therefore be closely fitted to ensure full contact with the substrate and avoid thermal bridges. 

The ‘pillowing effect’ is generated by excessive compression of the insulation by the insulation holder. This can result in a reduced effective insulation thickness and thus a lower thermal efficiency.  

Knauf Insulation offers accessories for the installation of insulation materials. This includes fixings, hangers, adhesives, sleeves, vapour barriers and adhesives. 

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