Building science / Green Building & Sustainable Home Renovation Information & Advice

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

Choosing the Right House Wrap / Weather Barrier, Which is Best?

...building materials. That gap in a rain screen doesn't need to be significant, just enough for water to drain and air to rise. If the weather barrier is tightly attached, as in the case of a peel-and-stick membrane or is part of a rigid board product, building scientists say as little as 1/16th gap provides a capillary ...

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!"

...building, 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 thing you can do to stop wind pressure is to work overtime when you are sealing up your house to prevent air leaks in the first place. The stack (or chimney) ...

Shipping container homes, Good or Bad?
Accessory dwelling units (ADU)

Are shipping container houses environmentally friendly & good or bad to live in?

...building on the pages below and in the Ecohome building guide. All about tiny houses and laneway homes How to stay on budget when renovating or building a new home Ontario clarifies building code permits for laneway homes & legal tiny houses  Tips for a successful home renovation or new build Architect-de...

Comparing ground source and air source heat pumps
Heating and cooling

Heat pumps: Ground source geothermal GSHP or air source ASHP, what's the difference?

...building budget. Also, cutting a big bill in half saves you more money than cutting a small bill in half, and savings is what determines the payback period. Another consideration while prioritizing components of a building budget, is the idea of diverting money away from heat generation and more towards heat retention;...

Cutaway of a modern energy efficient electrified home
Concept and design

Building science for LEED v4 wall design made easy - video

...building Science  The wall we designed for the Edelweiss house, Canada's first LEED Platinum V4 Home is best categorized as a 'REMOTE' wall, a high performance building envelope developed by the Cold Climate Housing Research Centre in Alaska. REMOTE stands for 'Residential Exterior Membrane Outside-insulation TEchniq...

R values and insulation performance
Efficient home design

Understanding thermal performance

...building materials! Lorne Ricketts is a Building Science Engineer [EIT] with RDH Building Engineering Ltd. and has significant experience with the thermal performance of building enclosures and insulation products. He was the lead investigator on a recent project by RDH which assessed the thermal performance of con...

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

...buildings like Passive House, Zero Net Energy or those that are LEED certified, all rely on the building envelope having a high level of insulation and being airtight. In a sealed building, moisture is removed and fresh air injected via an HRV or ERV unit to control the energy losses from essential ventilation. To put ...

Energy modeling simulation of heat loss through thermal bridging
Insulation and soundproofing

What is a thermal bridge and why is it so important to break it?

...Building codes and thermal bridges: It is not only sensible to address thermal bridging in construction, it is becoming law. Recent revisions to building codes have increased the thermal requirements of building enclosures in many regions, including requiring a thermal break. Contrary to common assumptions, the insu...

Basement Design for walls prevents mold & midlew when renovating & finishing
Basement finishing

Basement renovations: How to prevent mold when finishing basements

...building and its furnishings. If left unchecked, mold eventually can cause structural damage to building materials and can cause health problems - that's why we don't want mold in our basements! Specifically we can prevent damage to buildings and building contents in the basement areas, save money and avoid these poten...

Thermal image showing where home heat loss is occurring.
Insulation and soundproofing

How Does Insulation Work?

...building codes. That covers the insulation material, but there is more at play to determine the actual or 'true' R value of a complete wall system.  Insulation materials (like batts of fiberglass or panels of foam) have their own specific R value, but if they are spaced between wooden studs, the lower R value of the st...

Built to ENDURE: the Net Zero Heat Kenogami House
Efficient home design

The Kenogami House: designed to ENDURE

...building must be designed for quality of life, taking care to ensure comfort, atmosphere and aesthetics Energy efficient: As heating and cooling are most often the largest components of the total energy consumption of a building, how energy efficient a building is largely depends on the building envelope. It control...