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Ventilated constructions

There are two types of construction, which can be used in the application of ROCKPANEL in ventilated constructions:

Open, ventilated construction

Closed, ventilated construction


(e.g. traditional construction)

(e.g. timber frame construction)
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8 mm ROCKPANEL board
Weatherproof gasket
Wooden frame
Breathable membrane
Wooden construction
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Insulation (f.i. ROCKWOOL)
Stone or wooden construction
Plasterboard
Waterproof membrane
Chair profile

Open facade

The use of water-draining sections is avoided, and some of the rainwater run-off runs into the cavity behind the cladding.

Using open joints in a wooden construction, the structure behind the vertical batten should be protected by a breathable, water repellent and UV resistant membrane. The cavity behind the ROCKPANEL board and between the breathable membrane should be at least 28 mm or the thickness of the battens (providing a cavity of 28 mm or 34 mm).

With an aluminium construction ROCKPANEL recommends a cavity depth of at least 40mm. The insulation should meet the standard EN-13162 (density 30 - 70 kg/m3), e.g. ROCKWOOL with a density between 51 and 69 kg/m3.

Closed facade

The rainwater is drained off as much as possible on the outer side of the cladding. The cavity depth for a ventilated cavity is at least 28 mm, in practice it is often the thickness of the timber battens (providing a cavity of 28 mm or 34 mm).

ROCKWOOL Ltd
ROCKPANEL Group

Wern Tarw
Pencoed Bridgend
CF35 6NY
Tel.: +44 (1656) 863 210
Fax: +44 (1656) 863 611
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Rockpanel board material for facade cladding and roof detailing
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