Users' questions

What is bad about foam insulation?

What is bad about foam insulation?

If you become exposed to the harmful chemicals in spray foam before it has a chance to fully cure, you could risk developing asthma or other breathing problems, along with eye and skin irritation. If the foam were to crack or break due to poor installation, you could also be subjected to foul odors.

Does spray foam insulation degrade over time?

Polyisocyanurate (polyiso), XPS, and spray closed-cell foams substantially degrade over time as the insulating blowing agent gases diffuse out and plain air diffuses in.

Is foam insulation a fire hazard?

Even though it’s heavily treated with fire-retardant chemicals prior to installation, it is a recognized fire hazard by the Consumer Product Safety Commission (CPSC). Spray foam insulation will ignite at 700°F.

How long does insulating foam last?

The International Association of Certified Home Inspectors states that spray foam insulation, wrap tape and housewrap insulation can last for more than 80 years. At the same time, cellulose, loose-fill, foamboard, loose fill and rock wool insulation can last up to 100 years.

What are the disadvantages of spray foam insulation?


  • The upfront cost is higher than conventional insulation.
  • Payback period is 2-4 years.
  • It is not generally a Do-it-Yourself project.
  • The installation process is longer.
  • The process could be messier.

    Can mold grow on spray foam insulation?

    If combined with your HVAC system, you will not only have a well-balanced air circulation system but will also minimize seasonal cooling and heating costs. Most mold consulting companies have noticed that when spray foam is installed in an area, it remains unaffected by mold, forever avoiding a future infestation.

    Where should you not use spray foam insulation?

    When NOT to Use Spray Foam Insulation

    1. For areas that are too close to electrical boxes:
    2. For areas too close to ceiling light boxes:
    3. Open-cell spray foam on your roof:
    4. For closed-cavity spaces:
    5. If you have a history of skin, respiratory, or asthma problems:

    Which house insulation is best?

    The best types of home attic insulation are open cell spray foam, fiberglass, and cellulose.

    • Cellulose is the oldest insulation material used for not only the attic but other areas of the home as well.
    • Fiberglass is another traditional insulation material that consists of extremely fine glass fibers.

    Can spray foam catch fire?

    Like many materials found in a home or building, spray foam can ignite and burn if exposed to a sufficient heat source. Foam insulation should be considered combustible and handled accordingly.

    Does spray foam insulation cause mold?

    According to Frank, moisture can be a concern if you construct a home and insulate it with open-cell spray foam. If closed cell is used, the moisture cannot make its way to the wood and present mold issues.

    Does expanding foam deteriorate?

    Zero Deterioration: Unlike fiberglass insulation panels and other forms of old-school insulation, spray foam insulation does not deteriorate or break down over time. As a result, it will not poison your air or contribute to a toxic air environment within your living quarters.

    What happens if foam insulation gets wet?

    If your spray foam gets wet, it will eventually dry out again. Spray foam that is wet for an extended period is likely to deform and potentially expose insulation in your wall. It would require a considerable amount of water for most spray foams to deform.

    What can spray foam insulation be used for?

    Spray foam insulation is an increasingly popular way to insulate homes and other buildings. Spray foam insulation is also often used to create air barriers or fill & seal odd-shaped cavities. “Open cell” and “closed cell” spray foam are the two main categories of spray foam insulation commonly used.

    What is the U-value of spray foam insulation?

    The typical U-value of open cell spray foam is about 0.35 W/m 2 K. Since spray foam has better insulating properties than wool (when the same thickness is used), you can achieve the same U-value by insulating to a greater depth.

    Which is better Closed cell or spray foam insulation?

    However on the plus side it has high vapour permeability allowing it to breath far better than the closed cell spray, so condensation build-up should be less of an issue. The other major benefit is that it offers better acoustic insulation, absorbing more sound in normal noise frequency ranges.

    Is it OK to use spray foam for loft insulation?

    Spray foam is getting more and more popular in the UK, it’s a great way to insulate your loft and protect for years to come. Many listed buildings are using spray foam loft insulation, and more and more in commercial use.

    What do you need to know about Spray foam insulation?

    The spray foam is a “continuous insulation and air seal plastic material that is sprayed on walls, roofs, into gaps and corners, and on all contoured surfaces. Spray foam can seal cracks and crevices throughout a home. Sealing cracks and gaps reduces the air exchange, or air leaks, in and out of a home.”

    How do you use foam filler for insulation?

    This foam adhesive/filler insulation spray is very easy to use and apply. You just take the included spray nosal and screw it on, then go to any gap or crack and spray the foam in the gap. The manufacturer recommends using silicone gloves on your hands to prevent skin from getting irritated by the foam.

    What is the are value of foam insulation?

    According to, spray foam insulation provides an R-value of 6 for every inch of insulation installed. By contrast, the R-value for fiberglass is closer to 2.2 per inch to 3.5 per inch depending on the source.

    Which is better foam insulation or fiberglass insulation?

    Spray foam insulation provides a superior R-value per inch compared to traditional rolled or blown in insulation. According to, spray foam insulation provides an R-value of 6 for every inch of insulation installed. By contrast, the R-value for fiberglass is closer to 2.2 per inch to 3.5 per inch depending on the source.