NRG Greenboard energy efficient insulative walling system product information

The NRG Greenboard™ Insulative Walling System forms a continuous weather-resistant thermal envelope around the external walls of the building. The versatility of the building and the workable nature of the Greenboard™ composite panel permits greater design freedom. This system allows the designer to economically provide a fashionable, long lasting render finish as well as comply with the strictest energy ratings required in modern building codes.

Tests show that a properly insulated building can reduce energy costs by up to 75%. This greatly reduces the running costs of the building in terms of energy savings and reduces the amount of green house gases released into the atmosphere.

Structure
The 40mm, 60mm and 76mm thick NRG Greenboard™ has sufficient strength and rigidity to be supported by wall framing spaced at 600mm maximum centres. When the NRG Greenboard™ is installed over masonary walls 40mm thick sheets may be used to add the " R-value" so the masonary wall complies with the thermal requirements of the new building codes being introduced.

Insulation Values (Table A)

Acoustic Values
Although the Greenboard™ itself offers only limited absorption of airborne sound, the complete system coated with the reinforced render and texture coating provide a reasonable degree of sound insulation eg. A complete wall comprising of an outer layer of render 60mm Greenboard™ fixed to a 75mm stud, which if filled with either Rockwool or Glass Fibre Wool, sealed by a standard 10mm plasterboard lining will provide a rating of STC 50.

Impact Resistance
The Greenboard™ Walling System when installed in accordance with the NRG Greenboard™ Walling System - Installation Manual 3rd edition August 2003 will have adequate resistance to impact loads likely to occur in normal residential and commercial use. The likelihood of damage in public areas in or around residential, commercial or industrial buildings where heavy impacts could occur should be considered at the design stage. Heavier grade fibreglass reinforcing mesh or multiple layers should be used and appropriate protection or barriers provided in vulnerable areas.

Durability
When the Greenboard™ Walling System has been installed in accordance with the procedures of the installation manual, by NRG Approved Installers the system is guaranteed for a period of ten (10) years.

Serviceable Life
When properly installed and maintained the NRG Greenboard™ Walling System can be expected to have a serviceable life of thirty (30) years under typical Australian conditions.

Maintenance
The textured wall cladding system should be regularly cleaned and maintained in accordance with the recommendations contained in the "Greenboard™ Render - Installation Manual" revision 2 August, 2003

Hazardous Building Materials
When installation is complete the NRG Greenboard™ Walling System and the Greenboard™ Reinforced Render System Is non-hazardous.

External Moisture
The "NRG Greenboard™ Walling System - Installation Manual 3rd edition dated May 2003 contains specific details and instructions for flashing around windows, finishing to edges and sealing penetrations. Head, sill and jamb flashings must be used as specified. The NRG Greenboard™ Walling System must not be allowed to come into contact with the ground and careful attention to detailing must be made to the ground - foundation - floor.

Internal Moisture
The NRG Greenboard™ Walling System is vapour permeable allowing the walls to "breathe". Water vapour generated from within the building can pass through the walls without causing damage to the system.

Approximate thermal resistances for NRG Greenboard™ and for typical wall constructions are as indicated in Table 1. BRANZ accepts these wall insulation levels in residential buildings where adequate levels of heating and ventilation are assured.

Fire
NRG Greenboard™ is manufactured from fire retardant polystyrene and will not support combustion.