vapour-control / Green Building & Sustainable Home Renovation Information & Advice

Vapor retarder latex primer instead of polyethylene sheet
Air and vapour barriers

Replacing polyethylene vapour barriers with latex paint vapor control

Vapor Barriers in walls, why polyethylene can be problematic It would probably surprise many home builders to hear what really causes moisture accumulation in walls, and what to do to prevent it. An understanding of how water vapor moves through walls is important, so a good place to start would be with our page explai...

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

Interior sheathing as an air and vapour or vapor barrier

There has been a steady evolution in the way we build homes over the last couple of decades, and the old standby wall recipe of 2x6s, fiberglass insulation and polyethylene doesn't measure up anymore with building codes, nor the trend towards high performance housing. One aspect of wall assemblies that is garnering som...

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

Why you should Never Install Air-Con in a Home with a Vapor Barrier

Vapor Barrier + Air-Con = Damp Moldy Walls So here's a little known fact that most HVAC installers won't tell a potential new client for central air; Polyethylene vapor barriers in combination with air conditioning in homes can rot walls because of the condensation they may cause. This is why if you have a newer home w...

Carpenter ants are a common pest and nuisance to get rid of in homes
Pest control

Removing insects and rodents from your home, safely & humanely (by preference)

Insects & Rodents, how to show them the door... Below is a list of some of the more common rodents and insects that invade homes, and some ideas on how to rid yourself of the offending guests. We would certainly advocate for the most humane and non-toxic solutions first, but we have included other options if the hi...

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

Vapour / radon barriers below slab floors

How to Install a Radon Barrier - Slab Floors If in the kind of area where it's a good idea to install a vapor barrier against radon ingress, (check out the Radon maps by state and province page to find out here) we can't stress enough how important it is to test for radon, or better still to continually monitor for hig...

Tyvek home wrap left exposed to wind and UV rays
Air and vapour barriers

Choosing the right house wrap / weather barrier, which is best?

A technical guide to understanding the role weather barriers and rainscreens play in a wall, choosing the right products and installation tips for optimum performance. They're officially known as water-resistive barriers or WRBs, sometimes weather-resistive barriers, but in practical terms they are more commonly called...

Painting with zero VOC paint from Benjamin Moore
Paints, finishes and natural coatings

Choosing safe paints

There is a current trend towards limiting the production of solvent-based paints, replacing them with solvent-free or water-based paints. The move towards safe paint has led to a noticeable improvement in indoor air quality since the mid-seventies, and better even in the last decade. But paints based on petrochemical s...

Techniques for reducing sound transmission in buildings
Insulation and soundproofing

Controlling sound transmission in buildings

The first step to controlling sound transmission in buildings is assessing the situation. What kind of noise is it? Noise in buildings is usually assigned to one of three classes: Airborne sound: Sound such as voices, TV or stereo sounds. The source does not strike or vibrate against the structure of the building. Stru...

Radon Mitigation - Installing a radon evacuation stack in a slab floor
Radon in Homes - Mitigation

Mitigating radon gas in homes

Radon gas builds up in homes and has serious health effects. Reducing radon gas in homes is cheap and easy with a slab floor barrier with proper sealing at junctions and evacuation stack which can vent naturally, or have a mechanical radon gas extractor fan fitted, depending on the levels of Radon in your home. Radon (...

How to insulate basements properly
Insulation and soundproofing

Best practices for basement insulation in new home construction

The most common practices currently employed for finishing basement interiors as living space rarely account for the impacts that come with the added moisture load below grade, or the amount of heat that will be lost to the ground. Existing basements are typically under-insulated or not insulated at all, and if they ar...

Installing recycled drywall in the Edelweiss House
Walls and ceilings - interior surfaces

Choosing the best drywall - video

How to Choose Eco-Friendly Drywall: There is a lot more to choosing drywall than one might think, and as it finds its way into pretty much every building made, a lot of resources are used in the process and noses irritated. In the LEED Platinum certified Edelweiss House, we used CGC Sheetrock® Brand Ultralight gypsum ...