X Clad and P Clad External Insulated Cladding Systems are an insulated clay brick slip system for use as protective/decorative cladding with or without a cavity over solid masonry, timber- and steel-frame and masonry external walls in new and existing domestic and non-domestic buildings. I Clad Internal Cladding System is a gypsum plasterboard used with clay brick slip facings for use as non-structural, decorative cladding for internal walls of timber and steel-frame construction above the damp-proof course in domestic and non-domestic buildings.
The wall and support frame to which the cladding is to be fixed should be structurally sound
The system can be used above and below the damp-proof course if suitable brick slips and mortars are specified in accordance with the Certificate holder’s advice to resist the higher moisture levels. The systems will improve the weather resistance and reduce thermal transmission of a wall and provide a decorative finish. However, it may only be installed where other routes for moisture penetration have been dealt with separately and where dampness, other than that caused solely by condensation, is not evident on the inner surface of the wall. The system can contribute to minimising condensation on internal wall surfaces.
Design wind actions should be calculated in accordance with BS EN 1991-1-4 :2005 + A1 : 2010 and the UK National Annex.
The surface spread of flame classification for the system is Class 0 or ‘low risk’ as defined in the Building Regulations.
The U value of a completed wall will depend on the selected insulation thickness, the number, type and method of fixings, the insulating value of the substrate wall and its internal finish. The thermal resistance of the system is primarily dependent upon the extruded polystyrene foam insulation element and extra insulation may be required to achieve the full level of thermal performance required by the Building Regulations.
Designers must ensure that an appropriate condensation risk analysis has been carried out for all parts of construction, including openings and penetrations at junctions between the insulation system, to minimise the risk of condensation.
The system resists the passage of moisture from the ground and from weather. Any water collecting in the cavity due to rain or condensation will be drained through openings at the base of each closed section of cavity.
Regular maintenance inspections should be carried out to ensure that the ingress of water does not occur.
Valid until 25th July 2018