FAQs about spray foam insulation


Nowadays, there are numerous methods of insulating a house, from fiberglass, to spray foam, wool and many others. Choosing the right one can be quite challenging, since there are numerous considerations people have to take into account. However, spray foam has become very popular in the past years, which is why people started to ask companies that provide Toronto spray foam insulation services numerous questions about this method, so here are the most frequently asked ones.

What exactly is spray foam insulation?

Also known as spay polyurethane foam insulation, this is a very popular insulating method used today since it is both cost-effective and highly efficient. It is a mix of two liquids that is applied using a sprayer onto various surfaces, such as walls, floor, or roof. The foam fills all possible cavities and completely covers surfaces by expanding the moment it is applied, thus becoming part of the structure of a house.

How is it different from other insulation methods?

Spray foam is considered superior to other insulation methods available on today’s market and one major difference is related to the fact that once applied, it manages to create both an air and a thermal barrier. This means that there is less heat loss and greater energy savings for the homeowner, not to mention that probably one of the most important qualities of spray foam is that it prevents mould from installing into the house.

Is there any difference between closed cell and open cell?

When it comes to spray foam insulation, there are two different types that people hear about: closed cell and open cell. Making the difference between them is highly important, because you have to ensure that you choose what is best for your house and for your family. On one hand, closed cell spray foam is known for curing into a rigid and hard state and its R-value is somewhere close to 7 per inch, which means that only one inch of application is enough in order to create the air barrier. On the other hand, open cell is softer and spongier and its R-value is around 4 per inch. Compared to closed cell, this form of spray foam requires nearly 3 inch of application in order to achieve that air barrier needed. What is more, open cell is known for being water permeable, whereas closed cell is not, which is an important factor to consider when choosing between the two to insulate a house.

But is it safe?

Over the years, many myths related to spray foam have reached people’s ears and have made them believe that this insulating method is not entirely safe, but they could not have been any more wrong. Spray foam is safe, although it might happen for some people to be more sensitive to the gasses and fumes that come from the process of installation. This is the reason why insulation companies advise occupants to vacate their homes before the process begins and for a short period of nearly 24 hours after it ends, since during these hours, the foam can fully off-gas.