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Put A Stop To Air Infiltration

Nov 18, 2021 | 0 comments

The last place you want to feel a cold draft is inside your warm home. If you feel a draft, you’re losing heat and money. The primary culprit of these cold drafts in the winter is air infiltration.

Air infiltration is the unintentional introduction of outside air into a building. When it’s cold outside, run your hand around your exterior door and window frames. If you feel air movement, you have an air infiltration issue that is costing you.

Here are a few common suspects where you might find air infiltration:

  • Around door and window frames – inside and out.
  • Places where brick and wood siding meet.
  • Joints between the chimney and siding.
  • Between the foundation and walls.
  • Around mail chutes.
  • Around electrical and gas service entrances, cable and phone lines, and outdoor water faucets.
  • Where dryer vents pass through walls.
  • Cracks in bricks, siding, stucco and foundation.
  • Around air conditioners.
  • Around vents and fans.
  • Wherever two different materials meet.

Fortunately, air infiltration can be fixed with some inexpensive DIY projects that are perfect whether you rent or own your home.


Caulking is inexpensive and very effective. It will usually pay for itself in energy savings within a year.

Caulking fills cracks, holes, cervices, and joints on both the inside and outside of your home. As a general rule, it is applied wherever two different building materials meet. For example, where the drywall meets the window frame.

All you need to add caulking on the inside or outside of your home is caulk and an optional puttying tool. You’ll also want to wait for a mild weather day as caulk is best applied when the outside temperature is at least 40 degrees.


Weatherstripping can seal leaks around movable joints like windows or doors and is especially perfect if you’re renting.

You need to choose a type of weatherstripping that will withstand the friction, weather, temperature changes, and wear associated with its location. For example, when applied at the bottom of a door, it might drag on carpet or erode because of foot traffic. The weatherstripping you choose should seal well when the door or window is closed while also allowing it to open freely.

Here are some different types of weatherstripping:

  • Felt and open-cell foams tend to be inexpensive, but they are susceptible to weather, visible and inefficient at blocking air flow. However, they are easy to apply, which makes it valuable in low-traffic areas.
  • Vinyl is slightly more expensive, holds up well, and resists moisture.
  • Metals last for years and are still affordable. For older homes, these can be a nice touch where vinyl feels out of place.

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