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How Much Does a Roof Insulation Cost?

For years, fiberglass batt insulation was the go-to insulation material for new buildings, but many homeowners are now choosing to switch over to more effective insulators that can hold up better over time. If your HVAC system is overworked and you want a more comfortable home, it’s worth investing in better insulation. Updating your existing insulation can save you money on HVAC repairs, and keep your home cozy year-round. 

Your overall attic insulation cost will depend on the size of your attic space and the type of insulation you choose. However, this cost will be offset by your monthly energy savings. Typically, good pitched or flat roof insulation can save you 15-20% on your utility bill, and quality insulation can last for decades before it needs to be replaced. A professional roofer can inspect your existing insulation during a routine roof inspection, and let you know when it’s time to consider adding more insulation. They can also help you get a better idea of how much it usually costs when insulating attic roof areas.

Types of insulation

When choosing the right type of insulation for your home, it’s best to consult a professional. Your budget, the weather in your area, and your particular space and roofing material will all factor into the decision. Some of the more common types of insulation include:

Blown-in cellulose insulation

Unlike traditional fiberglass batt insulation, cellulose insulation is typically made from recycled paper and wood, and it’s a popular choice because it is one of the most environmentally friendly options. Blown-in cellulose insulation is also widely used because it can minimize damage from fire when it’s installed properly. Because it can get very compact, there is virtually no oxygen in it, which can slow the spread of flames. You can expect to spend around $1.40 per square foot for your materials, but it will depend on the R-value or your material. Some people will need to select a more allergen-friendly material, as the paper dust can trigger reactions. 

Spray foam insulation

Spray roof insulation foam is a popular insulation choice because it provides an excellent air and moisture barrier, and it will stay in place once it’s cured without shifting or falling. This type of insulation is quick to install, but it’s pricier, and it can be a messy job. Spray foam requires protective gear to prevent inhalation and keep it from irritating your skin. It can also only be installed when the weather is warm enough to allow it to cure. Spray foam is more costly than other options, and you can expect to pay anywhere from 65 cents to $1.50 per square foot. This will depend on whether you select a closed cell or open cell spray foam. A professional roofer can help you decide the best spray foam for your needs. 

Rigid foam insulation

The rigid foam insulation cost per square foot is a little lower, but it is not as effective at sealing gaps. However, it can be installed underneath rafter boards for additional protection. Many homeowners choose to use spray foam around the gaps for the best combination of price and effectiveness. Rigid foam will need to be cut and placed carefully, making it a more labor-intensive alternative that takes longer to install. Rigid foam insulation can cost as little as 45 cents per square foot. 

Radiant barrier

A radiant barrier can absorb excess heat in your attic and save your cooling system energy, as well as providing some protection against heat loss in the winter. Because San Diego stays sunny throughout most of the year, this type of insulation is a worthwhile investment.  Radiant barriers work best when combined with traditional insulation for year-round savings. You can expect to pay up to 30 cents per square foot of attic space on materials for this insulation type. 

Experience you can trust

The insulation material is only part of the picture when it comes to your home’s energy savings. The roofing material on your home also affects your indoor temperature. The cost of metal roof installation can be seen to be worth the investment because a metal roof is much better at reflecting heat and insulation against cold than an asphalt roof. A flat roof typically has membrane insulation, and installing additional insulation will often require different approaches than pitched roofs. At Preman Roofing Solar, we have the experience and skills to walk you through the best insulations for your budget and space because we know something like a metal roof installation cost can be intimidating. We can also ensure it is installed correctly the first time so you can save money on materials. 

We have over 20 years of San Diego roofing experience, and we are here to meet all your residential and commercial roofing needs. Once we’ve quoted you, we guarantee our price and timeframe, so you know exactly when to expect us and how much you’ll have to pay for your insulation service. Contact us today to set up a free estimate and learn more about how we can help you stay comfortable in your home.