Appraisal number: 604 (2008)
Date issued: 24 Sep 2008
StoTherm Masonry Insulation System
The StoTherm Masonry Insulation System is an exterior insulating and finishing system for concrete masonry, in situ or precast concrete walls.
The system consists of expanded polystyrene (EPS) StoTherm Panels fixed to the concrete masonry or concrete wall with adhesive mortar and mechanical anchors. The plaster system consists of an 8 - 12 mm thickness of fibreglass mesh reinforced synthetic resin plasters and synthetic resin finishing plasters applied to the StoTherm Panels. The plaster system is finished with a 100% acrylic exterior paint system. The top coat plasters can be textured to give different finished appearances.
The StoTherm Masonry Insulation System has been appraised as an exterior insulating and finishing system for buildings within the following scope:
- With substrates of concrete masonry, in situ or precast concrete up to 3 storeys with a maximum height from ground to eaves of 10 m.
- With floor plan area limited only by seismic and structural control joints.
- With supporting structures designed and constructed in accordance with the NZBC.
- Situated in NZS 3604 wind zones up to and including extra high.
The StoTherm Masonry Insulation System has also been appraised for bond/fixing, durability and weathertightness of the exterior insulating and finishing system for concrete masonry, in situ or precast concrete buildings subject to specific design up to a differential design ultimate limit state (ULS) wind pressure of 2.5 kPa.
The StoTherm Masonry Insulation System must only be applied on vertical surfaces except for sills, concrete-reinforced parapets and concrete-reinforced balustrades, which must have a minimum 10° slope and be waterproofed in accordance with the requirements of the technical literature and building designer.
The StoTherm Masonry Insulation System for use on buildings within the scope detailed above is appraised for use with aluminium window and door joinery that is installed with vertical jambs and horizontal heads and sills. (The Appraisal of the StoTherm Masonry Insulation System relies on the joinery meeting the requirements of NZS 4211 for the relevant wind zone.)
Installation of plasters and accessories supplied by Stoanz Ltd and approved applicators must be carried out only by Stoanz Ltd approved applicators.
- SS207 StoTherm Masonry Insulation System, August 2008
- StoTherm Masonry Insulation System installation detailing, detail numbers STCB 01 to STCB 12, all dated 2008
Always refer to the Appraisal in full and the technical literature.