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Government Consumer's Guide
Section 1 - Introduction
It has often been said that windows are the eyes of the home, allowing the occupants the opportunity to observe what is happening outside. But window functions don't just end there. We rely on windows for natural lighting, ventilation, as emergency exits, and as an integral component of the architectural style of the home.
In calling on windows to perform these many functions, we still expect our windows to be inexpensive, easy to operate and maintain, durable and attractive – and energy-efficient. Improving energy efficiency reduces greenhouse gases that contribute to climate change. Because they are called upon to perform so many functions, it may be difficult for windows to do all of them equally well.
For example, a large north-facing picture window may give you a breathtaking view of the countryside. But if the window is not very energy-efficient, the heat loss from it may be quite high; indeed, it may be very uncomfortable to sit beside this window on a cold winter day.
Fortunately, technical breakthroughs have improved window technology immensely, ushering in the era of high-performance windows. If your windows are over 15 years old, it may be time to think about replacing them.
In recent years, Canadians have spent more on renovations than on new construction, with windows representing one of the largest single
investments in a typical renovation. And, when it comes time for major renovations around the home, an increasing number of Canadians are paying as much attention to energy efficiency and economics as they are to architecture and aesthetics.
Remember, a typical window will last up to twenty years or more. Therefore, the decisions consumers make in the selection of windows and doors – either for a renovation or a new home – can help define energy efficiency and comfort levels in the home for years to come.
High-performance windows and doors – the subject of this guide – offer significant improvements in solar control, thermal comfort and energy efficiency. They do this by incorporating low-E coatings, inert gas fills, and better edge spacers and frames. This guide explains how these advances in window and door technology work, and will help you make informed decisions about purchasing windows and doors – whether you are replacing units in an existing home or designing a new home.
Section 2 shows you how to assess your current situation and what to look for in windows and doors.
Section 3 walks you through a primer of window and door types and terms.
Section 4 discusses how windows perform as part of the house, while Section 5 explains the causes of condensation on windows and how to reduce or prevent it.
Section 6 introduces you to the various window rating systems currently in place, with special emphasis on the ER (Energy Rating) system. Section 7 describes the advances and innovations in window components currently coming on the market in the form of high-performance windows.
Section 8 translates all the technical terms and performance characteristics into the bottom line for you, the consumer. It helps you appreciate the benefits of high-performance windows, in addition to understanding the technology.
Section 9 describes what to look for in doors, patio doors and skylights. Section 10 shows you how to develop a checklist before you shop and how to choose a supplier. It also shows you how to make informed decisions about what to buy, based on the ER number, cost and appearance.
Section 11 makes sure that you understand the importance of warranties, choosing a contractor and proper installation. And, finally, Section 12 provides you with directions on where you can obtain further information.
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Section 2: How to Get Started
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