HAVE PROBABLY HEARD A CONTRACTOR OR A TRADESPERSON MENTION 2LB SPRAY FOAM OR 1/2LB SPRAY FOAM.
- What are they talking about?
- How are they different?
- You will find out today!
Let’s first talk about the characteristics of each type.
- Is closed cell, which mean that that is rigid, it rejects water and it acts like a vapor barrier among other things
- Expands to 40x from liquid state
- Has a low exothermic reaction temperature which means it won’t harm coatings on electrical wiring, plumbing or other building components.
- Is open cell -this means that is it’s soft, flexible, vapor permeable (not a vapor barrier).
- Provides superior sound control.
- Expands 100x from liquid state.
- Has a low exothermic reaction temperature.
Of course, each type has its place in the insulation process.
They both can be used in:
- cathedral ceilings
- internal walls
- bonus rooms cantilevered floors
- crawl spaces
- internal basement walls and rim joists
The 2lb foam can be used on the outside of a basement wall and under the basement slab.
Both types of foams have superior cold climate performance making it an ideal insulation solution for our cold Canadian climates.
Spray foam supports indoor air quality by blocking air infiltration and mass transfer of moisture that can lead to mould.
These 2 types of spray foam do have limitations though.
2lb and 1/2lb foam should NOT be used for the following:
- Inside electrical outlets or junction boxes
- Placed above a roofing membrane
- Exterior surfaces, exposed and/or in contact with water
- For flotation purposes
- 2lb should not be used against a substrate that exceeds 180F at installation or in the future
- ½ Foam should be not used against a substrate the exceeds 158F at installation or in the future.
No matter what kind of foam you choose for your project please make sure that you are dealing with certified installers that are using CCMC (Canadian Construction Material Centre) approved foam.
Please visit us at www.pentafoam.ca or call 204-992-2603 if you would like us to help you with your next insulation project.