Dos and don’ts when applying spray foam insulation

One of the most common choices people make nowadays when it comes to home insulation is spray foam. It is worth mentioning that contrary to what some people believe, insulating your house is a very good idea, not only because it will maintain your house in good condition for a longer period, but also because it will help you save more money on bills. There are numerous professional and reliable foam insulation companies on the market that have several years of experience in the domain and one very good example is Great Northern Insulation. Here are the dos and don’ts when applying spray foam.

Do check the foam temperature before spraying

Checking the foam temperature before spraying it is an essential thing to do, since it should be neither too hot, nor too cold. If the foam is cold, it will be much spongier and softer than it should be and it will not harden enough in the end, reducing the R-value of the foam and its quality as well. The R-value will also be reduced if the foam is applied too hot. One good way to warm up the kit is to leave it in direct sunlight for several minutes.

Don’t spray with clogged nozzle

One of the most common mistakes people tend to make the moment they decide to insulate their homes using spray foam is to do this with a clogged nozzle. Experts in the domain strongly recommend checking the nozzle before using it in order to benefit from the best results. If the tip of the nozzle is clogged, you should replace it with a new one, since otherwise you will obtain an irregular and uneven foam pattern. Check the nozzle even during the spraying process, since it might happen for foam to stick to the tip, in which case you can try either to slightly remove the foam or to replace the tip.

Do maintain a constant speed

The secret to obtaining the perfect results when applying spray foam insulation is to maintain a constant speed from the beginning to the end. Spraying the foam too fast will result in applying on the walls of your house nearly half of the amount of foam available, which is not enough for proper insulation. On the other hand, doing this too slow will result in applying a coat that is too thick and that will take too much time to harden.

Do not overspray

Last but not least, under no circumstances should you overspray. Even though at first you might believe that applying a thicker coat of foam would be better for your house insulation, you should know that this is not recommended at all. Make sure that foam grows and installs on the walls of your house properly by not spraying too much foam in one place. Moreover, if you think about applying a second coat right after the first one, you might want to think again, since by doing this you will only lose about half of the volume of foam.


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