There are many reasons why we have to prevent the common air leaks. Drafts around the house will increase your energy bills. To prevent this, check for leaks at behind knee walls, attic hatch, wiring holes, plumbing vent and open soffit. Check also the furnace flue or duct chaseway at the basement rim joists where the foundation meets the wood framing and on windows and doors. Reducing air leaks is one of the most cost-effective ways to cut heating expenses.
Most of the time common air leaks are felt around the attic and basement. This will become a major source of wasted energy. In order to prevent more air leaks, conduct a test around your house.