air-leaks / Green Building & Sustainable Home Renovation Information & Advice

We cannot overstate the importance of airtightness in homes and attic rooms. A proper air barrier reduces heat loss in winter, overheating in summer, and prevents moisture build up in walls which can lead to mould and rot. We recently had a chance to try out a product that at first sounds too good to be true, but one t...

The difference between air barriers and vapor barriers The job of a vapor barrier is to prevent vapor diffusion, and the job of an air barrier is to stop air leakage through differences in air pressure. A wall system should have one vapor barrier, but can have many air barriers. A vapor barrier can act as a very effect...

What is a blower door test? Blower door tests are becoming part of many State and Provincial mandatory building codes - the new BC Energy Step Code in British Columbia, Canada is one example.  A blower door test is often an essential part of a home audit, we don’t know for sure just yet if it will be part of the free h...

Approximately 100 times more water vapor is carried into our walls by air leakage than is carried by vapor diffusion. That makes air barriers 100 times more important than vapour barriers, so why is no one talking about them? We don't talk about air barriers because we are too busy talking about vapor barriers. An air ...

Air Tightness in Houses - All about Balancing Air Pressure in the Home We go on incessantly here about the importance of air barriers in home construction to reduce air leakage, but no matter how hard you worked to make a house airtight, if the pressure isn't balanced you will be sucking air in or forcing it out and, d...

The Ecohome Demo House has a vapor permeable exterior air barrier, and with an ACH rate of .69 it is  several times more airtight than the average new home. Air leakage can be responsible for up to 1/3 of the total heat loss of a home and cause significant moisture damage in walls, as one small hole can be responsible ...

Homes built in the last 40 years in Canada are relatively airtight. Before that we generally relied on leaky uninsulated walls to provide fresh air and prevent mold and mildew, and they did that very well. Cost and comfort had us adding insulation, but not necessarily sealing our walls. The folly of this was quickly re...

While governments have a role in shaping and improving the built environment through zoning, development bylaws and other means, developers also play a large role. They choose where to build, the types of homes or buildings that get built, and many of the details that make up a home, neighbourhood and community.  The b...

Why fix leaky faucets? One of the jobs that sat on my honey-do-list for quite a while longer than I care to admit has been to fix the leaky and dripping older-style faucet in the bathroom at the cabin - made worse by us being off grid and only having a finite amount of rainwater available in our outside catchment tank....

What do whales listen to?      'Pod' casts...   Talking of which, I listened to a fascinating podcast recently explaining how the carbon capture potential of whales and supporting international efforts to restore whale populations around the world is one of the simplest ways to fight climate change. The podcast was hos...

Almost daily, new products come on the market that are more efficient, more effective, and/or more innovative. The ones we are really impressed with will make it here to our product of the month feature. Today we look at a new solution for changing the air in your home while maintaining excellent energy efficiency in h...