Metro Series Awning & Casement Windows by ALTHERM Window Systems

Ōtautahi Christchurch’s Personal Best, with Altherm Window Systems

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Interior view of open awning windows stacked with fixed lights

Standard window frame (fixed light)

Finned overlight transom with sash below

Internal box mullion option

Non-facing sash

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Description

A non-facing sash is used as standard to enhance the range aesthetics, emphasising clean, flat surfaces for a modern appearance. Double glazing to a maximum 24mm thickness can be used.

Mullions and transoms offer a choice of stiffening fins projecting internally or externally depending on window span and aesthetic considerations.

Key Features

A versatile, high performance product range based on a unified and contemporary design approach
Occupies an intermediate position between Altherm Residential and the APL Architectural Series
Awning and casement sashes have a facing option and a flush, non-facing option
Facing sashes available in three performance grades
Mullions with external fins or internal boxes available
Two–point espagnolette locking available

Ranges

Metro Series

Scope of Use

Suitable for most residential environments in larger sizes
Awning windows provide versatile ventilation with a good degree of weather protection
Casements can direct breezes inside and have a traditional aesthetic
Need to be used in defined maximum sizes according to the wind exposure

Limitations on Use

Care needed if projecting on to walkways and decks. Restrictor stays can limit opening in such situations
Restrictors will be needed to conform to NZBC F4 'Safety from falling' if windows open on to a drop of 1m or more
Consider a horizontal sliding window to protect walkways
Caution is required for the use of casements which open directly into prevailing winds
Casements beyond benches may have top fasteners that are hard to reach.

Statement of Building Code Compliance

Designed, tested and manufactured to meet NZS 4211: Performance of Windows, and NZS 4233: Glazing in Buildings, Parts 1-4
Designed and tested to conform to NZ Building Code, including Clause E2

In-Service History

Launched in 2006
Design upgrades regularly released
Widely used by homeowners, builders, Group home builders and specifiers

Other Performance Attributes

Window and door warranty provided under normal conditions of use against failure of materials and workmanship for a period of five years
Surface finish is covered by a separate performance warranty dependent on the actual finish selected
A hardware/componentry warranty is offered against defects in manufacturing, functionality and surface finish for a period of five years, provided care and maintenance guidelines have been followed

Case Studies
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December 2022

Case Studies

December 2017

Product News

Documents

Data Sheet

Span Tables

Declare Label

2025

Altherm on Masterspec

Full Specification

docx

Specification Clause

docx

Specifier Guide

WGANZ Guide to E2/AS1

Altherm Care, Maintenance & Warranty Brochure (with AGP)

2020

Altherm Design Brochure

2020

Sound Solutions Brochure

2020

AGP Cleaning & Maintenance

AGP Condensation Guide

AGP Visual Quality of Glass

APL and Sustainability

2019

Manufacturer Contact List