Mind the Gap - How to Find and Fix Energy Leaks

If you have ever traveled on the London Underground (The Tube) you are likely familiar with the "Mind The Gap" warning, telling passengers that there is a gap you must step over when entering the train.


While waiting for the tube on a trip last May, it dawned on me that "mind the gap" is also particularly important for homeowners when it comes to sealing your house, where even the smallest gaps can result in drafts and wasted energy.

Fixing gaps is a very simple project, but a thorough approach can take a few hours, if not a good chunk of a day or weekend. Today we'll look at how to approach DIY home sealing and what you'll need to save money on your electric and gas bill.

The Three Problem Areas of Windows

 Boarded Window

Windows can be a major source of drafts, and in some cases, an avoidable source. As windows age, as your house settles, and as materials warp and wear, gaps and cracks in sealants used to prevent air infiltration can occur.

The good news is that these problem areas are often easily fixed.


In general, there are three areas to check around a window. Some people like to wait for a cool and windy day and hold a lit candle or wet hand up around the window perimeter and check for any drafts. While that method is the most thorough, anytime is good for a plain old visual check, which can reveal some problems as well.

The three areas to check are: