Moisture / Guides

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Healthy indoor air quality

Removing dust and moisture from homes

...moisture from homes helps keep air healthy for occupants, and helps keep home humidity down. Excess humidity in houses can cause moisture damage, but what is not often considered is that added energy consumption involved, as heating moist air requires significantly more energy than heating dry air. When using manufactu...

Exterior air barrier membrane © Ecohome
Air and vapour barriers

How to install an air barrier for reduced air leakage

...moisture damage in walls, as one small hole can be responsible for depositing countless litres of water inside walls. Houses should always be built as airtight as possible, don't let anyone tell you otherwise. The difference between air barriers and vapour barriers: The job of a vapour barrier is to prevent vapour ...

Finished basements can lead to mold and mildew
Healthy indoor air quality

Why are basements moldy? How to fix or Prevent a Moldy Basement

...moisture permeability, an almost immeasurably small amount of moisture will be able to migrate into the wall, but with no interior vapour barrier it will pass through harmlessly. EPS, XPS and mineral wool are unharmed by moisture, and perhaps most importantly, EPS and XPS are unlikely to provide a breeding ground for m...

Radon and vapour barrier below slab on grade floor
Radon in Homes - Mitigation

Vapour / radon barriers below slab floors

...moisture from wicking into concrete and disbursing it into homes, also to create a radon barrier. Radon gas occurs naturally in the soil, a result of decomposing uranium in the ground. So it's everywhere, but more intense in some locations than others. A passive radon stack are also a prerequisite under the LEED for ...

Repainting and refinishing brick facades
Exterior cladding

All about painting brick, is it a good idea and what paint to use?

...moisture from the interior of a home and they need to be able to expel that moisture ; applying paint to the exterior can cause the paint and masonry to lift, peel or crack as it can become susceptible to freeze thaw cycles in cold climates. Beyond just aesthetics, moisture trapped inside a brick facade can also affect...

How to insulate basements properly
Insulation and soundproofing

Best practices for basement insulation in new home construction

...moisture protection for this wall assembly will mean moisture will migrate inwards. Mineral wool is not harmed by moisture, but there may be additional heating and coolling loads inccured by having higher relative humidity levels. Basement dehumidifiers can help keep keep humidity levels manageable. Please see our page...

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

The Difference between air barriers and vapor barriers

...moisture it can hold, where the dewpoint 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 ). The job of both air barriers and vapor barriers is to prevent moisture from forming at that critical point, they just do it ...

Installing foam panel insulation, which is best?
Insulation and soundproofing

Rigid insulation panels: which ones to use for different applications

...moisture than XPS, but it doesn't retain moisture to the same extent because of it's more closed cell structure and it's breathability which lets it dry out. Two inches of EPS foam board has a moisture permeability rate of between 60 and 75 ng (1 to1.25 perms), which is on the cusp of qualifying it as a type II vapour ...

Basement Design for walls prevents mold & midlew when renovating & finishing
Healthy indoor air quality

Basement renovations: How to prevent mold when finishing basements

...moisture, where humidity in the air condenses, and by so eliminating mold growth. Quick Fact Check: Eliminating all mold and mold spores indoors is virtually impossible, but controlling indoor moisture and the hidden moisture within basement wall assemblies will control the growth of indoor mold. According to the E...

Installing Siding Correctly
Exterior cladding

How to install siding

...moisture in all seasons and conditions. Drainage planes (building paper, house wrap, etc.) allow any moisture that does accumulate behind siding a chance to drain away harmlessly. The air space between siding and sheathing should also allow humid air to escape. In order for both of these actions to take place, when s...

Condensation on windows leads to mold & mildew in homes, ERV & HRV systems help
Ventilation

Ventilation & air exchangers

...moisture in homes, and condensation on windows was common place and hard to stop . This led to a build up of mould and mildew in homes. Modern day airtight homes need mechanical assistance to stop moisture damage and protect indoor air quality, especially true in basements where ventilation is essential to stop mold fo...