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

Concept and design

The two thirds rule of insulation within wall assemblies

...building techniques in the Ecohome Green Building Guide and these pages below: The difference between air barriers and vapor barriers Choosing the right house wrap / weather barrier, which is best? Smart vapor membranes as a safer alternative to vapor barriers Building science made easy - understanding the basi...

Installing a smart vapor barrier on a prefab wall under construction.
Air and vapour barriers

The Complete Guide to Smart Vapor Barriers and Vapor Open Membranes to Help Keep Walls Dry

...building techniques in the Ecohome Green Building Guide and these pages below: Understanding the difference between air barriers and vapor barriers How walls work - Building science made easy video guide How to build a basement so it won't go moldy - best basement wall assembly Buy  weather barriers (WRB), vapo...

Rigid Rockwool mineral wool insulation boards being installed. Image © Ecohome
Insulation and soundproofing

What Are the Best Rigid Insulation Board Alternatives to Foam Panels?

...building principles, the shift to foam-free rigid insulation is a move toward lower embodied carbon, superior fire safety, and a more breathable building envelope. Traditional foam boards, particularly XPS - of which actual Styrofoam is one type of XPS extruded foam - use HFC blowing agents with extremely high global w...

Closed-cell structure of rigid foam insulation board with trapped gas
Insulation and soundproofing

Thermal Drift in Foam Insulation: Understanding R-Values in Insulation, Why They Change and Degrade Over Time

...building and is its LTTR. The prosumer's perspective: thickness and cost When calculating your building envelope, the difference between R-6.0 and R-4.5 can translate into a need for significantly thicker insulation to meet energy code requirements (like the R-20 or R-40 assemblies required by Passive House or other...

Black Graphite EPS foam Panels as Part of a Prefab Wall. Image © Feris Buid Tech
Insulation and soundproofing

Graphite-Enhanced EPS (GPS): The Next Generation Rigid Foam Insulation

...building techniques in the Ecohome Green Building Guide and these pages below: A guide to choosing the right rigid foam insulation panels (XPS, EPS & Polyiso) Is building ICF homes a good or bad idea? Choosing the best insulation for basements, walls and roofs Are rigid foam panels considered a green insula...

Workers assemble ICF blocks to pour a basement foundation
New foundations and slab-on-grade

Is ICF the Best Way to Build a Basement?

...building or extending a home. Now that you know more about Insulated Concrete Forms for building a basement, find more info about high-performance building and green building techniques in the Ecohome Green Building Guide and these pages below: Which is better - slab on grade, crawl space or a basement? Why are bas...

An Old Brick Faced Home Tricky To Air Seal - Image © Blackstone Edge Studios
Air and vapour barriers

How to Air Seal Older Homes for Better Energy Efficiency

...building techniques in the Ecohome Green Building Guide and these pages below: How to keep air quality clean during home renovations Peel and stick exterior air barrier membrane - DIY installation video guide Sealing up your old chimney can save you money on heating bills How to air seal and insulate attics in ...

A close-up shot of cleaning black mold spores on a wooden beam in a basement
Healthy indoor air quality

A Guide to Safe and Non-Toxic Mold Removal from Wood Framing in Homes

...building techniques in the Ecohome Green Building Guide and these pages below: Protect your indoor air quality - the best non-toxic home cleaning tips How to keep home air quality clean and safe during renovations How to convert attic space in older homes into usable living areas   How to insulate crawl spaces ...

Vermiculite Insulation In An Attic
Healthy indoor air quality

How to Know if Vermiculite Insulation has Asbestos, and do I Leave It Undisturbed or Have it Removed?

...building techniques in the Ecohome Green Building Guide and these pages below: How to identify and remove asbestos from homes How to protect air quality and keep homes clean during renovations Find the best home air purifier in the Ecohome green building products directory Buyers guide for home air filters in f...

Workers installing a smooth, textured finish of an EIFS exterior on a building
Wall assemblies - renovation

A Homeowner's and Pro's Guide to EIFS Exteriors

...building and green building techniques in the Ecohome Green Building Guide and these pages below: Building science principles: how we got here and what we've learned How to choose the best exterior cladding The ultimate guide to air sealing a home How to install exterior siding so walls can dry Sign up now and reap the...

A hazy New York, New York, skyline & bridge colored by orange wildfire smoke
Healthy indoor air quality

How to protect your home & family from wildfire smoke

...building in the pages below and the Ecohome Green Building Guide pages. How to keep home ventilation systems operating well - see our HRV and ERV maintenance tips Get Surgically Clean Air purifiers at the Best Promo Prices, with Ecohome Furnace and air filter buyers guide - Hepa, smart or standard, which is best?...