Below you can find some examples of effective massive wall solutions: concrete walls with brick facades with standard and passive house structures and stone walls with metal frame systems.

A) Concrete with Brick facade

A brick facade provides a beautiful, traditional appearance to a building. When designing brick walls, remember the following issues. A brick wall absorbs water – the water may even be transferred through the whole brick lining. To keep water away from the insulation, a proper ventilation gap is needed. The gap must be solid, open and finless. A brick facade keeps the air movement in the ventilation gap at a lower level than with timber cladding. To ensure proper ventilation of the structure, leave every third vertical seam of the second lowest layer of bricks open. Design the wall must so that penetrating water can be led out from the structure.

Ventilated facade, massive 2
  • Supporting structure: concrete, blocks, brick or other stone-based structure
  • PAROC WAS 50t or PAROC Cortex One
  • Ventilation gap ≥ 30mm
  • Brick masonry

 Insulation solution with U value
PAROC WAS 50t 200 mm   225 mm 250 mm 
U value, W/m2K 0.16 0.14 0.13

It is also possible to make insulation from two different layers:
Ventilated facade, Cortex
  • Supporting structure: concrete, blocks, brick or other stone-based structure
  • Thermal insulation: PAROC eXtra 
  • PAROC WAS 25t or PAROC Cortex 
  • Ventilation gap ≥ 30 mm
  • Brick masonry
 Insulation solution with U value
 PAROC Cortex  30 mm   50 mm    30 mm 50 mm   50 mm
 PAROC eXtra  100 mm  150 mm  175 mm  175 mm  200 mm
U value, W/m2K  0.25 0.17 0.16 0.15  0.14

Passive house structures

A passive house requires an insulation layer that is thicker than that required for a standard house in building codes. With a stone wall, the thickness of each layer is not limited by specific timber frame dimensions, so the the thickness of the structure can be selected more freely.

Ventilated facade, massive 11
  • Internal surface
  • Supporting structure: concrete
  • Thermal insulation: PAROC eXtra (d1)
  • PAROC WAS 25t or PAROC Cortex (d3)
  • Ventilated gap min 30 mm
  • Brick facade
  Small houses  Block of flats Offices and Schools
Recommended U value W/m2K  0.07 - 0.10  ≤0.12  ≤0.15
Concrete 120 mm + d1 mm  325 - 500  250  200
d3 mm  30   30   30
Total insulation thickness mm   355 - 530  280  230

According to the definition of a passive house provided by the Passive House Institute, the annual heating, cooling and primary energy demand should not exceed certain values. Although good thermal insulation plays a major role in achieving the Passive House standard, it alone cannot ensure compliance. The requirements for other building components and devices can be determined by various calculations tools, such as the Passive House Planning Package (PHPP), available at


Ventilated wall, corner detail  Corners of buildings are critical places, so they should be carefully considered when installing thermal insulation. We recommend using PAROC XST 020 outside tightening tape for wind protection and PAROC XST 021 for corners

B) Metal frame systems

In this ventilated façade application, install the metal frame so that thermal insulation can be installed tightly both against the masonry and between the metal studs. Put PAROC Cortex on top of the frame system to give the whole structure a continuous thermal insulation and wind protection layer. Carefully seal wind protection insulation seams with tape. When installing the facade cladding to the secondary studding in the frame system, follow the manufacturer’s instructions. The system usually creates the needed ventilation gap behind the cladding automatically.

Ventilated facade, massive, frame
  • Supporting structure: Blocks, bricks, concrete, etc.
  • Steel frame / PAROC eXtra 
  • PAROC WAS 25t or PAROC Cortex 
  • Ventilation gap
  • Facade cladding (steel cassette, fibre cement board, ceramic/stone plate) 
Ventilated facade, massive, frame  PAROC Cortex is a non-combustible product and has a good fire class A2, s1-d0, making it suitable for high rise buildings.