A passive home is often likened to a thermos due to its highly insulated nature. Find out about the insulation we use in our homes.
Dense Packed Cellulose Insulation
We’ve talked elsewhere about the double wall construction we make use of in our passive house kit. This construction approach allows us to create that thermos effect, removing any potential for air leakage, and is one of the key factors leading to a home that remains cooler in summer, and warmer in winter.
So what’s inside that wall cavity?
Highly insulative with a low carbon footprint, recycled wood fiber is the basis of the cellulose insulation we use to insulate our passive homes. It comes in a dense packed application that is blown into both the walls and roofs of our homes. The resulting walls have an R75 rating, the roof R110.
Shown here are the 25 pound bags of ProCell insulation. The insulation is fed into a hopper, to break it up, before being blown into the wall and roof cavities.
We work to a proven ratio of 3.5 lbs per cubic foot of blown cellulose, which prevents the insulation from settling over time. This is critical in order for this application to work optimally. Every project involves applying this calculation to determine the number of bags that will be needed.
Video Reel: Paul explains this application.

The Benefits of Cellulose
This insulation application, which we’ve come to depend on over years of use, comes with many benefits, among them:
- Occupant health – the product is safe and non toxic
- Stable – inhibits mold, mildew or fungi growth
- Secure – Repels insects and rodents
- Green – your best option, with a low carbon footprint
- Effective – creates seamless coverage
- Affordable – competitively priced against batts or fibreglass applications
- Quality – its thermal, acoustic, and fire resistance properties are exceptional
Installed correctly, using the optimal density, it’s hard to beat blown cellulose. Making the most of passive home technology is all about following the right techniques using the best materials. When you purchase one of our passive house kits, we provide in-depth guidance for your local builder to ensure the integrity of your home’s build.
Video Reel: Paul demonstrates installation.

Building Passive? Build with EkoBuilt
Our passion and knowledge on passive home design and building technology is what makes EkoBuilt your best choice for your most sustainable home.
In addition to our extensive portfolio of passive house plans, our in-house design service for custom homes, our tried and tested passive house kit (shipped across North America), and our experience of the best materials and systems to use, we also curate resources for home owners and local builders every day.
If you purchase our passive house kit, you’re also purchasing our experience and expertise. Learn more on these pages:
Our live webinar for homeowners is also your best option for arming yourself with the information you need to make key decisions on your project.
Ready to talk? Give us a shout!
