Spray Foam Insulation Vs. Fiberglass Insulation

Save

When you're having a house built, there are so many decisions to make you probably don't put much thought into insulation. A little thought now can make a big difference in the years ahead, though. There are benefits and drawbacks to both spray foam and fiberglass insulation; consider both to make a wise decision.

Man installing fiberglass insulation
(LianeM/iStock/Getty Images)

Spray foam insulation is a liquid that contains a polymer, such as polyurethane, and a foaming agent. When applied, it expands and hardens into a solid form, filling all available space.

Fiberglass insulation is made by melting sand and recycled glass together. It usually comes in a blanket (long roll) or batts (pre-cut rectangles), though loose fiberglass can be blown into a cavity.

Spray foam around window
Pi-Lens/iStock/Getty Images

Both can be made to give you the same R-value, but fiberglass will require a much thicker layer than spray foam. R-value stands for resistance to heat flow and is the way insulation is measured--the higher the R-value, the better the insulation.

Spray foam insulation always needs to be installed by a professional. Fiberglass batts can be installed by a do-it-yourself homeowner. Fiberglass insulation requires a separate air barrier, but spray foam insulation acts as its own air barrier. Fiberglass can leave gaps around obstructions such as pipes, but spray foam completely fills all crevices. Fiberglass insulation can deteriorate over time. Spray foam insulation never sags or degrades.

Man installing insulation
Wavebreakmedia Ltd/Wavebreak Media/Getty Images

One of the biggest things to consider when deciding between spray foam and fiberglass insulation is your budget. Spray foam is significantly more expensive up front. You'll recoup your initial investment over time with big savings on heating and cooling costs, but that will take years.

Related to that, you should consider the climate where you live. In extreme temperatures, you'll see a bigger energy difference with spray foam insulation than you will in a more mild climate.

Home with spray foam insulation
Joe Belanger/Hemera/Getty Images

The benefits of spray foam insulation are numerous. It provides a tighter seal in hard to insulate areas, it lasts well over time, it reduces construction time and it makes for lower energy bills.

The major benefit of fiberglass insulation is its lower price. It's also possible to install it yourself, making it possible to further lower the cost. Fiberglass insulation is noncombustible, which is not true of spray foam insulation.

Man installing insulation
Jupiterimages/Pixland/Getty Images

No matter which type of insulation you choose, be sure to install as high an R-value rating as you can. A little extra insulation won't add much to the overall cost of the project now, but trying to add more insulation later will be expensive and difficult. You'll be surprised what a difference a higher R-value rating can make in your energy costs.

Man installing insulation
Jupiterimages/liquidlibrary/Getty Images

Related Searches

References

Promoted By Zergnet

Comments

Related Searches

Check It Out

22 DIY Ways to Update Your Home on a Small Budget

M
Is DIY in your DNA? Become part of our maker community.
Submit Your Work!