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May 28, 2023

Houseworks: Window installation best practices

Reviews and recommendations are unbiased and products are independently

Reviews and recommendations are unbiased and products are independently selected. Postmedia may earn an affiliate commission from purchases made through links on this page.

If you’re planning to have your windows replaced, you’ve got two things you need to pay attention to: window quality and installation quality. The thing is, unless you know what a good window installation looks like, you won't know if you’re getting the most for your money. This article will change that.

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Reducing energy use is the No. 1 reason for replacing old windows, and payback period is between seven and 20 years, depending on the kind of windows you’ve got now.

Another benefit of new windows is reduced road and neighbour noise in the house. Sound transmission is measured either with the Sound Transmission Class (CTC) rating or the Outdoor/Indoor Sound Transmission Class (OITC). Either way, the higher the number, the better the sound blocking capabilities.

The first thing you need to decide on is either full replacement or retrofit replacement. Full replacement windows are just as the windows were installed when your home was being built. They require new interior trim and include some kind of exterior trim or brick mold already in place on the outside window face.

Retrofit windows, on the other hand, are designed to make use of the existing window jambs, interior trim and exterior trim. All else being equal, replacement windows are less expensive than full replacement models, and they’re easier and quicker to install. That said, full replacement windows result in somewhat more glass area, and they deliver new exterior trim and window sills.

Another thing to consider is window performance levels. Besides the various insulation levels of double and triple pane units, the best windows also pass performance criteria as identified by independent testing. www.windowwise.ca is the best place to get independent window performance results in Canada.

When it comes to actual installation details, these are the points that matter most:

New windows are a major investment and you should do some homework to ensure you choose good windows installed well. Get things right and you’ll enjoy great window performance for a long time.

Steve Maxwell is partial to old-style windows with divided lites. Visit him online at BaileyLineRoad.com for information and inspiration on home improvements, workshop life and hands-on living.

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