Metro's high performance Xtreme™ double glazing can significantly reduce heat loss, and solar gain, to make for a warmer, drier, healthier home. Double glazed windows will help keep generated heat inside, reduce overheating from sun in the summer months, keeping your home at a more consistent temperature - cutting down your power costs to heat in winter.
Double glazing is made from two pieces of glass sealed together with an air space in between which provides a number of extra benefits over single glass. Whether you want to keep your home warmer, quieter, or reduce condensation, Metro can recommend the best combination of glass types to meet your needs because they have the widest range in NZ.
• Xtreme™ is great for large sunny windows, or when you want to limit potential overheating
• Up to 61%* better heat retention
• Lets in 74% of visible light, enabling warm, naturally light-filled spaces
• Reduces solar heat by up to 48%* making it perfect where overheating may be an issue
Metroglass IGUs are manufactured for, but not limited to, use for windows and doors in projects within the following scope:
• All building types located at less than 800m above sea level.
• All NZS3604 wind zones up to and including extra high.
• Site specific design wind pressures above the NZS3604 windzone values (subject to design checks and confirmation).
• B1 Structure: Metroglass IGUs are manufactured to project specific requirements in accordance with acceptable solution B1/AS1 (which cites NZS4223 set of standards)
B2 Durability: Metroglass IGUs are manufactured to Acceptable Solution B2/AS1 and are tested by IGUMA to BS EN 1279–4 in accordance with NZS4223.2. Storage, handling, transport, preservation and glazing must be carried out in accordance with AS/NZS 4666:2012. Water must not be trapped against the edge seal as this will result in failure and ultimately condensation on the internal glass surfaces. IGUs must not be exposed to elevated heat. Refer to Window & Glass Association of New Zealand (WGANZ) website for proof of compliance https://www.wganz.org.nz/double-glazing-manufacturers/
E2 External Moisture: Glass is impervious to water. Adequate drainage is required in the glazing system to ensure that water, moisture, or condensation are not trapped against the edge seal as this will result in failure.
F2 Hazardous Building Materials: Metroglass IGUs likely to be subject to human impact safety can be manufactured to specific project requirements to comply with NZS 4223.3 in accordance with F2/AS1 clause 1.0.
• F4 Safety from falling: Metroglass IGUs can be manufactured in accordance with NZS4223.3 clause 21 Window glazing safeguarding a fall, to the specific project requirements.
G7/AS1 Natural Light: Metroglass IGUs can be manufactured to the required Visible Light Transmittance (VLT) to project specific requirements.
H1 Energy Efficiency: Metroglass IGUs can be manufactured to project specific centre of glassthermal transmittance (Ug). They are made from a range of glass types (i.e., Low E coated glass, float glass, laminates, obscures, tints), spacer widths and argon gas, which establish the IGU U-value to EN673, which ultimately is utilised to calculate the window R-value (by others).
Relevant Building Code clauses• B1 Structure: • B2 Durability • E2 External Moisture • F2 Hazardous Building Materials • F4 Safety from Falling: • G7 Natural Light • H1 Energy Efficiency:
Design requirements that would support use of the building product Metroglass IGUs are manufactured for, but not limited to, use in projects within the following scope: • All building types located at less than 800m above sea level. • All NZS3604 wind zones up to and including extra high. • Site specific design wind pressures above the NZS3604 windzone values (subject to design checks and confirmation). Metroglass IGUs are customer manufactured to the requirements of each project. Prior to manufacture, the following project criteria are validated and confirmed by the purchaser: • IGU size • IGU thickness • Glass thickness and type • Project wind zone or specific engineering design factored wind pressure • IGU performance criteria, i.e. U-value, Solar Factor, VLT, Safety Glass requirements, colour considerations For guidelines see IGUMA IGU design limitations
https://metroglass.co.nz/products/windows-doors/double-glazing/xtreme
Metroglass IGUs must be installed in strict accordance with the https://assets.metroglass.co.nz/files/resources/care_and_maintenance/igu-handling-warranty-instructions-2014.pdf
and the IGUMA guidance document found here:
https://www.wganz.org.nz/wp-content/uploads/2018/06/Handling_and_Storage_of_IGU_-_Published_May_2015_-.pdf
Metroglass IGUs are comprised of glass and sealant products which are sensitive to damage and deterioration during both the construction phase and in-service use. Metroglass IGUs must be maintained in accordance with Metroglass cleaning and maintenance guidelines, found here https://metroglass.co.nz/resources/glass-care
and the IGUMA cleaning and maintenance guide document found here https://www.wganz.org.nz/wp-content/uploads/2018/06/IGU_Cleaning_and_Maintenance_Datasheet_06052000.pdf
GLASSTECH XTREME DOUBLE GLAZED UNIT (IGU)
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