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San Jose

Spray foam insulation is a great material to use for several different applications, which is why many people choose to use it as an insulation material in both homes and commercial spaces. The unique feature of spray foam is that it is the only type of insulation that forms a complete air seal which helps to complete your building envelope. Should you choose to install foam insulation in your home or commercial space, speak to an insulation contractor in San Jose, as soon as possible.

Read on to find out more about the misconceptions of foam insulation, off-gassing, and whether it is best to remove old insulation before installing new foam insulation.

Misconceptions Regarding Spray Foam Insulation

Foam insulation is a very popular choice for commercial and residential buildings; however, there are a few misconceptions associated with it. Let’s clear up some myths regarding foam insulation.

Foam, insulation shrinks over time

Foam insulation will not shrink if it is well-installed by an insulation contractor in San Jose, CA. Only when it is not properly installed, will it cause problems. Always choose a contractor whom you trust. Before any insulation is installed, enquire about the quality of the products that will be used.

Closed-cell is better than open-cell spray foam

Many people including some insulation contractors in San Jose, CA believe that closed-cell spray foam is much better than open-cell foam insulation. However, this is not true, because both types are capable of creating a complete air seal. Each type has its own pros and cons and can is used in different areas. While closed-cell spray foam is useful for industrial applications, open-cell spray foam is generally used for residential buildings. However, closed-cell spray foam insulation may also be used here.

More insulation is better

Another common misconception is that the more insulation you add the better it is. However, when it comes to spray foam insulation, after a certain point, the R-value will be achieved, and spraying extra layers of spray foam over it is a waste. A good insulation contractor in San Jose, CA will know exactly how much spray foam to use rather than spraying extra. Sometimes just 2 inches of foam insulation is more than enough.

Outside walls cannot be insulated without tearing them down

If you want to install foam insulation in your outside walls, there is no need to demolish them because injection foam can be easily insulated, depending on the type of walls that you have. Injection foam is easy to install because the siding can be removed and holes can be drilled in your wall cavity and filled after it is insulated.

Foam insulation causes a hot roof

You may have heard that spray foam insulation makes your roof hotter however, this is not true. If you have an unvented attic, the temperature of your roof may rise, but not so much that it can cause damage to your roof shingles. As insulation contractors in San Jose, CA, we have installed attic insulation in many homes successfully.

Electrical wiring cannot be fitted in walls

Closed-cell foam insulation is compact. However, if open-cell or injection foam is installed, fish tape and wiring can easily be pushed through it. If you are not planning on renovating your entire home, but you still want to install wall insulation, you can still go ahead and do so.

Does Foam Insulation Off-Gas?

Off-gassing refers to a chemical gas that is given out by a material. Though some spray insulation products give off a smell, other products that are made with premium components will not off-gas as much.

It is true that foam insulation off-gases due to the chemical odor that it gives off, however, once the foam insulation is completely cured, you will not need to worry about off-gassing anymore. A good insulation contractor in San Jose, CA will prepare you before foam insulation is installed in your home or commercial building, and will inform you how many hours you need to stay away.

Today you can find some spray insulation products that cure in a few hours, but others may take up to 48 hours to cure. Once the area is ventilated and all odors are eliminated, and waste materials are removed, you need not be worried about off-gassing or odor. If you or your family members have respiratory issues or health problems, make sure to inform your insulation contractor in San Jose, CA as you should enter a newly insulated building only once the spray foam cures completely.

Does Old Insulation Need to Be Removed?

If you are considering installing spray foam insulation in your home, or commercial space, you may be wondering if you need to remove the old insulation first. If you speak to an insulation contractor in San Jose, CA, they will advise you that removing the old insulation is always a better option.

Your old insulation should be removed because it could be damaged, from pest infestation or leaking roofs. Cellulose and fiberglass insulation may also be damaged by mold and mildew because they absorb moisture. Another reason that you may need to remove old insulation is that it does not give you the comfort that it used to give you before. Additionally, keep in mind that both cellulose in fiberglass insulation needs to be replaced every 20 years or so.

If you have to remove your old insulation and replace it with new insulation, opting to install spray foam is a great idea. An important reason for removing old insulation, in this case, is that foam insulation needs a clean substrate to adhere to. It cannot be sprayed on an unclean space. Foam insulation will also not add any additional value if it is sprayed over cellulose or fiberglass.

Contact Us

Contact us if you need to clear any misconceptions regarding foam insulation, or if you need to meet a good insulation contractor in San Jose, CA. We have the knowledge and expertise to help you in all your insulation matters.

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