Simple Way to Weatherize: Interior Storm Windows for Window Insulation

There are a number of great ways to reduce unwanted air infiltration around the home. In addition to the v seal weatherstrip we discussed earlier, interior storm windows also help reduce the amount of cool air coming in through windows. However, instead of sealing cracks and gaps the way a v seal does, interior storm windows cover the entire window to add a layer of protection against the cold. Also referred to as vinyl storm windows, they are easy to install, effective, and low cost.

Installing interior storm windows can be accomplished in a few simple steps:

  • Around the window frame, attach the lengths of the adhesive plastic channels
  • Spread the clear 4 mil vinyl across the face of the window
  • Hold the vinyl in place with the spline (thin plastic strip), which will lock into the channel

This draft reduction tool comes in a variety of sizes to fit a variety of windows. To determine what the best fit for your home application would be, simply measure the length and width of your window, and find the vinyl storm windows that come closest to your measurements. It is best to choose a window kit that is above the measurements than below, as they can be cut to fit your needs. The plastic spline and plastic channels can be cut with a utility knife, while the vinyl size can be decreased with scissors.

This type of window insulator is low cost, ranging from $7 to $11 in price. In addition, once the cold weather season has passed they can be taken down and reused the following winter using the same steps above. As a result, interior storm windows are ideal for any budget and any home, whether you are a homeowner or a renter.

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