Spray foam blowing agents / Guides

4th generation blowing agents for spray foam
Insulation and soundproofing

New HFO blowing agents for spray foam will make it over 1,000 times less harmful to the climate

...blowing agents for foam insulation. That halted ozone depletion but handed the burden to the climate change file instead. Blowing agents are the gasses that expand the foam to its rigid shape, and those tiny bubbles of gas act as insulators. They're found in XPS rigid panels and spray polyurethane foam (SPUF) as well...

Spray Foam Insulation - Is it Good or Toxic & Dangerous?
Insulation and soundproofing

Is spray foam insulation a good choice for your home? Or a toxic recipe for disaster?

...spray foam insulation. So....time for a look as the less appealing aspects so we can all make informed decisions. The disadvantages of spray foam insulation as a green building product Regardless of the adoption of more eco-friendly spray foam blowing agents, there is still the matters of air quality, building du...

Roxul mineral wool batt insulation in LEED Homes
Insulation and soundproofing

Choosing the right insulation: the pros, cons and applications for walls, slabs & basements

...Spray Polyurethane Foam) Spray foam on basement walls © Bala structures U pdate: new blowing agents for spray foam dramatically reduce their environmental impact. Read more. Recycled Content : Minimal at best. Some are advertised as ‘soy based’ but there is so little soy content compared to the ecological imp...

Is EPS foam eco-friendly? Exterior home insulation rigid foam panels
Insulation and soundproofing

Does plastic foam or Styrofoam insulation have a place in green building?

...foam blowing agents ( spray foam is already transitioning to lower GHG blowing agents; read more here ), then you solve a big part of the problem. If we capture and re-use the blowing agents, like pentane gas, even better. And if we create large-scale recycling of older foam insulation to make new foam insulation, then...

Basement Design for walls prevents mold & midlew when renovating & finishing
Healthy indoor air quality

Basement renovations: How to prevent mold when finishing basements

...blowing agents have a high global warming potential (GWP). For this reason, we like to explore less harmful alternatives whenever possible - though *January 2018 update: new blowing agents for spray foam virtually eliminate green house gases, read more here. Probably the most worrisome problem (as reported by a SPUF ...

Finished basements can lead to mold and mildew
Healthy indoor air quality

Why are basements moldy? How to fix or Prevent a Moldy Basement

...blowing agents have a high global warming potential (GWP). For this reason, we like to explore less harmful alternatives whenever possible - though *January 2018 update: new blowing agents for spray foam virtually eliminate green house gases, read more here. Probably the most worrisome problem (as reported by a SPUF ...

Frost in Attics: What causes Attic Ice? How to Fix it?
Roof assemblies - renovation

Why is there frost in my attic? Is ice in roofs a problem & How do I stop it?

...spray foam may be the only solution. We've generally steered our readers way from spray foam products in the past due in part to health concerns, but mostly to the very high Green House Gas emmissions from spray foam blowing agents. However 2020 has seen great news about the reduced global warming impact of spray f...

Ice dams on roofs & how to fix them
Roof assemblies - renovation

What causes ice dams and how to fix them

...spray foam is closer to R6 per inch. The high ecological cost that comes with spray foam stops us from recommending it except for very urgent circumstances and this can be such a case. For existing homes with limited space over the top of walls, replacing a lower-R value per inch with a higher-value insulation like s...

How to Vent Roofs - the Methods, Vent Types, Fans
Walls and Roofs

Why Roofs need to be ventilated and how to ventilate a roof properly

...foam much cooler, and therefore introduce the risk of condensation forming if warm air finds its way there. Worth a quick note about spray foam; some manufacturers have switched to much safer blowing agents, see here for choosing the best spray foam with HFO blowing agents . Ecohome’s engineer Denis Boyer performed s...

How to Insulate Exterior Walls from the Outside US Canada Ecohome
Walls and Roofs

The easiest way to insulate walls from the exterior in older homes

...spray foam if you choose (spray foam is our least favorite but it can be done so we mention it, though we always encourage readers to choose spray foam with the safest blowing agents ) Larsen truss walls can be made in a variety of thicknesses, which is a really nice advantage to the design as it can be done in a way...

The Top Twelve Green Building Trends for 2020
Planning and Design

Find out what's trending in 2020 for Green Home Construction

...Spray foam and XPS foam with lower emission blowing agents Styrofoam board insulation and spray foam insulation have always had a bad rap in the green home construction industry, and not without good reason , but the true problem is not what most people think. A brief pause here while I slip on the Kevlar vest I wear...