airtight-homes / Green Building & Sustainable Home Renovation Information & Advice

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, d...

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

What is an air barrier?

Approximately 100 times more water vapor is carried into our walls by air leakage than is carried by vapor diffusion. That makes air barriers 100 times more important than vapour barriers, so why is no one talking about them? We don't talk about air barriers because we are too busy talking about vapor barriers. An air ...

How radiant floors work
Delivery: radiant, forced-air and decentralized

How to design for thermal comfort in a home

Have you ever noticed that at times you can feel cold in your home even though the air temperature is exactly where you like to keep it? That's because, contrary to what most of us think, air temperature is not the main factor that determines human comfort in a building. To illustrate a point, let's start outdoors. I m...

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

Ventilation & air exchangers

Homes built in the last 40 years in Canada are relatively airtight. Before that we generally relied on leaky uninsulated walls to provide fresh air and prevent mold and mildew, and they did that very well. Cost and comfort had us adding insulation, but not necessarily sealing our walls. The folly of this was quickly re...

Passive House certification - PHI or PHIUS? The Spring House Passive House
Passive House

Everything you need to know about Passive House certification

What is Passive House certification? The term “Passive House” was once obscure jargon used solely by construction engineers & technically-minded home designers, but now "certified Passive House" is being increasingly specified by construction professionals and homeowners across North America. The concept of Passive...

Understanding sound transmission in homes
Insulation and soundproofing

Understanding sound transmission in buildings

Before embarking on any structural changes, it is most important to understand that the sound isolation between two homes is not determined only by the common wall or floor. All the other parts of the construction - side walls, ceilings, floors under walls - can transmit sound. Flanking sound transmission (see below), ...

High efficiency wood burning fireplaces and how to choose the best
Wood stove and biomass heat

Choosing the best wood-burning fireplace inserts or stoves for heat output & the environment

Wood Burning Inserts & Stoves - which are best & which burn cleanest? Reading the specifications to find the best wood burning fireplace inserts or wood stove can be rather complicated, so how do you choose? Let's shake loose the important points from all the technical jargon and make the process a bit more enj...

Real estate

Real estate

For most of us, purchasing or building a home will be the biggest investment of our lives. This section is about knowing what to look for in new homes to get the best value for your dollar, or what to look for in a building lot for the same reasons. What to look for in a location: Being close to where you work and pla...

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

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

How to protect indoor air quality from smoke during wildfires in homes with HVAC? As we move towards summer in Canada and the USA, we're hoping that last years wildfires are not going to be as bad again this year - but unfortunately in areas like Calgary and the North East of the USA, there have already been air qualit...

Resilient home construction - Kenogami House of the Year
Efficient home design

"The Most Resilient House in North America"

A resilient home for Sustainability Northern Quebec isn’t a place where one might expect to look for a model of resilience. It’s bone-chilling cold in the winter with 10,450 heating degree days per year (Fahrenheit degree-days, base 65°F); there isn’t all that much sunlight in the winter, and Quebec—let alone northern ...

Home construction
How to Find Qualified Green Building Professionals

Hiring professionals or doing it yourself

1. Hiring an architect: We discussed previously the idea of choosing an architect that specializes in high-performance Eco-friendly home design and can co-ordinate the work. They should be able to help you find general contractors and subcontractors that can help you carry out your work according to plan. This route is...