Drafts can contribute to significant discomfort in homes. Throughout the world when it is windy, all roofs go into negative pressure, which in turn sucks the warmth from a house to the outside. Reducing pathways for air leak leakage reduces the impact of all air leaks in a building. In this video we explain how a roof goes into negative pressure, and talk about how improving the airtightness of your home can reduce the effect of these wind pressures on your house.


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