Sealing air leaks / Guides

Air and vapour barriers

Aerobarrier home and attic air-sealing spray

...sealing the hole. An 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...

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 leakage accounts for about 1/3 of the total heat loss of a home . A blower door test for buildings is a way to measure air leakage but, more importantly, it’s a way to find air leaks and fix them. Fixing air leaks is ‘low hanging fruit’ in terms of improving the energy efficiency of homes under construction since...

Correctly installed Triple pane south facing windows on Ecohome's Demo House
Windows and doors

Installing doors & windows for the best performance in high efficiency homes, LEED & Passive House

...air leakage in homes as well as to save energy. Water leaks from around windows and doors are the visible result of a poor fitting or sealing job, but that's far from where it ends. If there are air leaks from around windows and doors, not only is a home inefficient - ie. It's losing energy - but it's susceptible to co...

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?

...airtight envelope also helps prevent the infiltration of smoke. Airtightness should be a priority to preserve indoor air quality during wildfires , since air leaks reduce the effectiveness of other measures. Caulking and weatherstripping can seal air leaks in existing buildings, and airtightness can be added as a des...

Bike lanes in Vancouver
Lifestyle, location and commuting

Vancouver's goal of becoming the Greenest City by 2020

...sealing your home, and with a fan in the doorway blowing out, the home is depressurized. This allows builders to measure, find and repair any air leaks before construction is completed. While they are a prerequisite for programs like LEED, unfortunately blower door tests are not something required by provincial build...

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...

Techniques for reducing sound transmission in buildings
Insulation and soundproofing

Controlling sound transmission in buildings

...leaks depends on the location of the electrical outlets and on whether there is sound-absorbing material in the cavity. Sealing is simple and does no harm. Are service penetrations sealed? Plumbing and air supply ducts might provide easy paths for sound, either around the edges because of inadequate sealing or by t...

Balanced insulation levels in a green home
Efficient home design

Insulation in Green Home Building, a balanced approach to putting it where it does the most good

...Air leaks are responsible for a surprisingly large amount of heat loss, so plan your air barrier well in the design phase and be very meticulous with air sealing when working onsite. High-quality windows on the south can gain more heat in the day than they lose at night, giving you a net heat-gain. Windows on all oth...

Condensation on windows in our homes - why is it there? - how to stop it?
Walls and Roofs

Condensation on windows is a pain but is it a problem & how to stop it?

...air quality , but water sparingly and often for best effect. Check for water leaks! – Any pipes carrying water in the house, both delivery of hot and cold or heating and evacuation, should be checked for leaks and any leaks fixed promptly. All excess humidity in a home’s structure is best removed at the source – so a...

Frost in Attics: What causes Attic Ice? How to Fix it?
Roof assemblies - renovation

Why is there frost in my attic? Is ice in roofs a problem & How do I stop it?

...air baffles ensure soffit ventilation works properly © InterNACHI Some builders have expressed concerned that ridge vents aren't sufficient because they can be blocked by snow, but snow isn't an air barrier. It will slow the air, but as long as the vent runs the length of the roof there should be enough air flowing...

Crawlspace radon barrier installation for radon mitigation
Radon in Homes - Mitigation

Removing radon gas from basements and crawlspaces

...Air sealing between floors to stop radon: If you have extremely high levels of radon, the Radostat and HRV option may work well , but might not bring you to completely safe levels. Due to the stack effect of warm air rising , basement air will always find its way to upper floors to balance pressure as warm air escape...