Air leakage / Guides

Exterior air barrier membrane © Ecohome
Air and vapour barriers

How to install an air barrier for reduced air leakage

...air barrier is to stop air leakage through differences in air pressure between inside and out. A wall system should have one vapour barrier, but can have many air barriers. A vapour barrier can act as a very effective air barrier, but an air barrier does not (and should not) always stop vapour from difusing. Understa...

Problem areas of air leakage in a home and blower door test being cond
Air and vapour barriers

Airtight Construction of Homes is Essential: "Your house sucks." "Oh yeah? your house blows!"

...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...

Air barriers are essential to a properly functioning wall system
Air and vapour barriers

What is an air barrier?

...air barrier as being: 1. Continuous: no gaps, cracks or openings. 2. Impermeable to the leakage of air. 3. Rigid: supported in both directions from wind pressure. 4. Durable: must last the life of the building. 5. Repairable: access for repair if damaged. A sampling of air barrier materials and techniques: ...

Blower Door Tests - What's the Cost & Who Does Them?
Air and vapour barriers

What is a blower door test? What's the cost? How do you find a company to do one?

...air in from any existing hole in your air barrier no matter how small it is. The operator then determines your ACH (air changes per hour) based on the house dimensions and the volume of air in the home. Standard new home construction in North America seems to return an average air leakage rate of about 3 air changes ...

The difference between air barriers and vapour barriers
Air and vapour barriers

The Difference between air barriers and vapor barriers

...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 effective air barrier, but ...

Wildfire Smoke & How to Keep it Outside Homes
Healthy indoor air quality

How to keep wildfire smoke out of Green Homes with mechanical ventilation systems?

...air. Window air conditioners should not be used during wildfires, unless their outdoor air intake can be closed. A portable air cleaner is recommended to complement air sealing and filtering measures during a wildfire. The air cleaner should have a High Efficiency Particulate Air (HEPA) filter, which blocks 99.97% of...

Interior sheathing as air & vapor barriers in wood frame construction
Air and vapour barriers

Interior sheathing as an air and vapour or vapor barrier

...air seal of a building is measured in ACH (Air Changes per Hour), and is determined by a blower door test where the building is depressurized by a fan in the door, and air leakage is measured. The average home built to code using conventional building practices is expected to have air leakage rates of 3.5 ACH, which ...

Living green wall
Healthy indoor air quality

Living walls: what they do and don't do

...air quality. Simply due to the rate of air leakage in most buildings, it would be difficult for anything short of an airtight house and a virtual jungle of plants to see a measurable improvement in air quality. However, from a quality of life and design perspective, these make for very cool living rooms. Having potte...

Air and vapour barriers

Aerobarrier home and attic air-sealing spray

...air seal is thereby created around any openings and cracks in ceilings, walls, windows, plumbing and electrical penetrations. This is an easy way to plug holes in your air barrier that you can’t possibly see - from as small as a human hair to as big as a half-inch wide. The airflow in the home is monitored in real ti...

How to Choose between an HRV and ERV system
HRV and ERV

Choosing between an HRV and an ERV

...air is enough? How much fresh air comes in through the building envelope? What is the difference between an ERV and an HRV? How to choose between an HRV and an ERV? How much fresh air is required in homes and the best way to provide it are important issues. Energy recovery from exhaust air is be...

Real estate

Real estate

...air quality does it smell fresh, stale, or like chemicals or tobacco smoke? Good quality windows - look for water damage around the interior, signs of air leakage, double or triple-pane Quality mechanical systems - iare they old or new? Check model numbers online for reviews and efficiency Some of the above ite...