According to Natural Resources Canada, there are three types of retrofits that can be done to existing buildings:

• Minor Energy Retrofit;
• Major Energy Retrofit; and...
• Deep Energy Retrofit.

The purpose of an energy retrofit is to improve the energy efficiency (performance) and comfort levels in an existing building. The most effective way to achieve better energy performance in a building is to increase the insulation and air tightness, while providing for constant mechanical ventilation.

The end goal of a deep energy retrofit is to create a well-performing building envelope that may decrease heating and cooling loads - these are the two biggest contributors to energy use in our climate. The ideal situation is to have a super-insulated building that is very airtight, allowing for reduced input from the energy grid.

FIRST STEPS

In order to ensure the best possible performance in an energy retrofit, the first step is to call a Certified Energy Advisor. The process of planning and executing an energy retrofit can springboard off of an EA's energy audit and inspection of the building - the audit establishes a baseline performance, or a picture of how energy efficient the building is currently. From that baseline, a plan can be made to improve, for energy efficiency AND for occupant comfort.

In the next stage, a renovation contractor gets involved and begins the process of planning and estimating for costs. Once there is a price tag attached to the job, applications for government and energy provider rebates can begin. The planning process continues until a clear strategy is formed for completing the project and contracts are signed with the client.

HOW MUCH RENOVATION IS REQUIRED?

When a retrofit is being considered, it's worth thinking about how much of a 'renovation intervention' is going to be done on the building. Some buildings may only require minor work while others might entail a gut job or complete rebuilding.