Relative humidity in homes / Guides

Poly vapour barriers in air conditioned houses can cause mold and rot
Healthy indoor air quality

Polyethylene vapour barriers in air conditioned homes can rot walls

...in the past, drawing in endless fresh air and removing moisture. Home interiors were also finished with plaster in the past, which requires about 99% Relat...

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Icicles are an indication of heat loss, which can cause damage to insu
Wall assemblies - renovation

Winter troubleshooting - are you ready for the cold?

...ing inside on exterior walls: This can be caused by thermal bridges in the original framing, poorly installed insulation, or even the complete absence of i...

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Condensation on windows leads to mold and mildew in homes
Ventilation

Ventilation & air exchangers

...incoming air instead of just creating negative pressure and letting cold air find its own way in everytime someone turns on the fan. You won't need to inst...

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Cleaning HRV intakes
HRV and ERV

How to keep your HRV clean and operating efficiently

...ing by and getting sucked against the filter to cut your air intake by an easy third, so keep an eye out in the fall. If checking and cleaning mechanical e...

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cold climat sk
Windows and doors

Skylights: an asset or a liability?

...ing envelope. New homes have ceiling insulation starting around R40, and finding them as high as R60 and R70 is not that unusual anymore, nor is that much insul...

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Vapor retarder primer
Air and vapour barriers

Replacing polyethylene vapour barriers with paint

...ing of 3.4 ng) is installed behind the drywall in new Canadian homes. In fact, you would be hard pressed to find a home being built in Canada right now that doe...

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Solariums in cold climates
Greenhouses and solariums

Solariums in cold climates won't heat your home

...intenance of the junctions between the frame and glazing; install a heat pump to reduce heating and cooling costs in winter while ensuring comfort in summer; av...

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Heat Recovery Ventilation - Lunos video
HRV and ERV

Lunos ductless air exchanger

...ing heat and humidity. Thus, in the manner of an ERV (Energy Recovery Ventilator), it helps to maintain the relative humidity of the air inside the house. ...

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

The Difference between air barriers and vapour barriers

...int will be in your wall is determined by the difference in temperature from indoor to out, and the amount of moisture in the air (RH - Relative Humidity). ...

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Earthship in Taos, New Mexico
Concept, design and architecture

Do Earthships work in cold climates?

...ing 'off-grid' means you need to burn fossil fuels instead of tapping into clean energy from the grid, you are increasing your carbon footprint, not reducing it...

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

Balancing air pressure in a house: "Your house sucks." "Oh yeah? your house blows!"

...ing, forcing air in on some sides and forcing it out on others. Aside from being blocked by other buildings or planting a stand of evergreen trees, the only thi...

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