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Secondary Double GlazingWhether you want to insulate and improve your modern home, draught proof your villa, or simply double glaze your house without fitting replacement windows, then Thermosash secondary double glazing is for you. Thermosash secondary double glazing has been designed to combat the widest possible range of thermal and acoustic problems.Today over 5000 homes in New Zealand have secondary double glazing installed by Thermosash who have been a market leader in this field in New Zealand, its first product being sold in 1973. For optimum acoustic performance of secondary double glazing use a glass which differs in thickness by at least 30%, (e.g. 4mm + 6mm + 10mm). Sound reduction will improve with increased glass thickness (particularly at higher frequencies) due to the greater mass involved. Increasing the width of cavity produces an increase in sound insulation but not pro rata. Beyond a spacing of about 200mm the incremental acoustic improvement is small and, generally, an expensive unit to install due to typical existing reveal depths. Sound reduction will increase with the use of laminated glass, due to the vibration dampening effect of the PVB or by lining the cavity with sound absorbant insulation material, generating sounds reduction of 10db (50%) is generally quite achievable with this product based on limitations of existing building in conditions, cladding, eave design. Thermosash ServicesThermosash can provide further technical support, design and performance data on request. We are able to provide a full design and costing service covering the many technical and performance aspects associated with a particular building design. We can design, fabricate, install and glaze our systems anywhere in New Zealand or overseas either in conjunction with our local specialists or directly through our own organisation. Façade Laboratory TestingThermosash owns and operates the largest facade testing facility in New Zealand where we test our systems and custom designed suites to ensure compliance with AS/NZS 4284:1995 or project specific requirements. GuaranteeThe standard guarantee is 5 years from the date of practical completion for these products. This covers workmanship and weather tightness, providing the subcontract includes fabrication, installation and glazing of all components. |
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