The importance of building envelope tightness
Do you have unwanted drafts in your home? Does it seem like the big bad wolf is outside huffing, puffing andtrying to blow your house down? This could be caused by a leaky building envelope. Having a tight building envelope is essential to having a quality home.
A tight building envelope should include both continuous and contiguous (touching) air sealing and insulation. Together, this will minimize the number of air changes per hour (ACH) in your home and improve the overall indoor air quality. Per the 2009 International Energy Conservation Code, adopted in Georgia along with a set of state specific amendments in 2011, the number of air changes per hour in a new home should be less than or equal to 7ACH.
Although it is important to minimize the ACH in your home, remember that ventilation is still required for healthy indoor air quality. If you have a super tight building envelope, don't forget to include a natural ventilation plan to get some fresh air into your home.
Topics: Indoor Air Quality
Luis Imery Luis Imery, through his business the Imery Group, is a full service construction, home energy performance, green certification and real estate group specializing in infusing sustainability in every facet of the real estate cycle. Its construction division has become pioneers in the Athens, GA area in green building of speculative, custom and design-built construction. Just in 2011 they have over 110 units slated for green certification under the EarthCraft program. www