Benefits of Expanding Foam Insulation

Expanding foam insulation is a method of applying a liquid resin that reacts with air to expand into its surroundings. The resin can be injected into small or large voids to fill the space with a solid foam. The resulting foam can seal gaps and cracks to prevent air from entering into your home. It can be sprayed onto larger areas to provide a thick layer of insulation for resistance to heat transfer.

There are many benefits to this form of insulation over traditional materials. These benefits include ease of installation and durability.

Ease of Installation
The chemical resin can be sprayed in liquid form onto the desired area without measuring, cutting, or fasteners. It adheres to practically everything used in typical house construction such as concrete, masonry, wood, and metal. Application is fast and simple.

Expanding foam insulation lasts longer than previously used materials. It maintains its effectiveness longer with resistance to breakdown, compression, moisture absorption, or attack by critters.

Since it is unaffected by moisture it also is practically impervious to mold even in damp areas. Because it is inorganic it is not attractive to animals and insects for eating, gnawing, or nesting.

The inorganic compounds are non-polluting and benign to the environment. The effectiveness of using expanding foam insulation improves the air quality of your enclosed spaces by preventing infiltration of exterior pollutants from entering.

The biggest benefit of using expanding foam for insulation and sealing is the reduction of energy transfer. Thermal resistance reduces conductivity, and sealing gaps and cracks reduces air convection. Overall energy savings are considerable and make it cost effective to use expanding foam insulation.

8 thoughts on “Benefits of Expanding Foam Insulation

  1. Pingback: Improve Interior Air Quality With Foam Insulation | Expanding Foam Insulation

  2. Russell Matejowsky

    Can I safely have an experienced installer apply spray foa directly between the roof rafters of a attic that I have yurned into a air conditioned room the roof rafters are only 2 x 4s and will I have a condensation or sweating problem on the underside of the roof if applied, should I apply
    Heatblock 75 or somthing better before having the expanding foam put in, I will have my gable ends and Knee wall sprayed also .


  3. admin Post author

    Hi Russell,
    You can spray expanding foam insulation directly between the rafters. You should then add a vapor barrier over the foam and rafters.
    Depending on your climate and weather you might consider furring out the rafters to 6″ in order to get adequate R-value and better comfort and energy savings.

  4. Richard

    I have a two story building built in the 1950s with an apt on the second floor under a flat roof with about 1 foot between the roof and the apt ceiling. Can I space holes in the ceiling and spray in foam insulation the same as you describe for a wall cavity? What suggestions can you make for such an application? Thank you.

  5. admin Post author

    Hi Richard,
    A 1 foot cavity would be quite a large volume to foam. It might be possible to apply foam to the underside of the roof decking to a lesser thickness but access and uniform covering might be a challenge. Foaming around wiring is fine but be careful if there are recessed light fittings that could overheat if foamed in. Blown in cellulose or fiberglass insulation is another choice.
    If there is any possibility of a roof replacement coming due consider removing the old roof decking, insulating from above and replace decking, urethane membrane, and sheathing. That would give you the opportunity of upgrading to current code and getting substantial insurance discounts, even a possible tax credit.
    In all cases be sure to find a reputable contractor who knows and installs to best practice not just the cheapest quote.

  6. Pingback: Garage Insulation | Expanding Foam Insulation

  7. Tyler Meredith

    I really like that you mention just how durable foam insulation is. I didn’t realize that it could last a very long time due to its chemical compounds and structure. It’s something to keep in mind because choosing to have this kind of insulation installed could be helpful to not only to get into the tight corners in the home but also to last a long time without having to worry.

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