How much does it cost to insulate a house? - Barrier insulation (2023)

How much to insulate a house?

The cost to insulate a home depends on how much you plan to insulate. For example, the cost to insulate an attic ranges from about$ 300 e $ 2.000.

There is no single answer to this question, as each home varies in size, condition, and whether it already has insulation.

The cost will depend on whether your building is a new home or an old home will needinsulation removalbefore installing new insulation.

Read below to get an idea of ​​how much it can cost to insulate your home by type of insulation. Prices vary based on the brand and type of each insulation, along with the amount of insulation that needs to be insulated in the home.

How much does it cost to insulate a house?

There are four main categories of insulation. Each has its advantages and disadvantages and will cost differently for insulation materials and labor to install them. The four main categories of insulation are; fiberglass insulation, spray foam insulation, blown insulation and radiant barrier insulation.

fiberglass insulation prices

The average insulation project typically involves around 500 square feet of insulation. The cost of 500 feet ranges from $145 to $200. For installation labor, fasteners, cutters and tape, it can run from $170 to $420.

Fiberglass or laminated insulationbattery isolationit is one of the least expensive ways to insulate homes in the United States. This is especially true if the wall or attic is open in new construction or during renovations. The cost of this insulation depends on the brand, the type, whether the insulation comes in boxes or rolls, and the area that needs to be covered.

(Video) Insulation Installation - R-Value In Walls, Attic, And Crawl Space (cost of material and labor)

Battery isolation can be effective, but only if it is installed with care. Any tears in the support or gaps will throw off the insulation's value. Each roll will display an "R-Value" which is a measure of how well the insulation works. As high as this number is, if insulation is not installed correctly, it will not be effective.

spray foam insulation prices

To calculate the cost offoam insulation sprayyou get square footage x depth. This provides the "plank feet" needed to complete your spray foam insulation project. You can then multiply that number by the cost per foot of board to get two spray foam insulation options. There are two spray foam options, open cell and closed cell.

  • The cost of open cell spray foamcosts about $0.35 to $0.55 per board foot
  • The cost of closed cell spray foamit's about $1.00 to $2.00 per foot of board.

So if you have a 500 square foot area that needs 6 inch deep spray foam, you will need 3,000 feet of board. You can take the required 3,000 board feet and multiply that by the price per board foot. For 3,000 square feet of spray foam in a 500 square foot area at $0.35, the cost of materials would be approximately $1,050. Setup fees vary by company; For information specific to your home, contact your local insulation supplier.

Spray foam insulation is popular for many reasons. First, it has great thermal performance. Second, it seals air gaps and leaks to keep your home more comfortable. This means it solves two problems when installed and helps reduce energy bills.

blown insulation prices

burned insulationit's popular because of how cheap the material is. For an area of ​​1,500 square feet, you might only pay around $500 for the materials. This makes it an attractive option for DIY homeowners, however, there is a learning curve to installing it correctly. Trained professionals will help ensure your insulation is installed correctly and is the right investment for your home. Fees vary from company to company and the area where you need to install the insulation. Contact your local insulation supplier for specific information on labor rates for your home.

radiant barrier insulation prices

The cost to installradiant insulation barrierdepends on whether it is packaged, rolled, brand and type. That said, radiant barrier costs range from $0.15 to $0.30 per square foot. This means that for a 550 square foot coverage you would be spending between $83 and $165. The double-sided radiant barrier is a little more expensive but more effective. Professional installation of a radiant barrier costs between $500 and $750, so plan accordingly when budgeting for your insulation project.

How much does it cost to insulate a house? - Barrier insulation (1)

Where to install insulation in a house

Where should you install insulation in your home? Below are common areas that homeowners want to add insulation to.

(Video) Right Vs Wrong: Installing Insulation Batts In Exterior Walls - Part One

attic insulation

Because most of the insulation is covered with a topcoat, the attic, which is typically unfinished, is the best area to start evaluating insulation levels in many homes. There's certainly already some insulation in the attic, but if you can see the tops of the ceiling joists or if there's only an inch or two of insulation covering the joists, you definitely don't have enough.

Fortunately, attics are a relatively simple place to add insulation, be it fiberglass or cellulose. Perpendicular to the current blocks, more blocks can be added. Loose insulation can fill impediments quickly. When insulating or reinsulating an attic, there are a few factors to consider.

The importance of air tightness is equal to that of insulation. Heat loss by conduction, or the passage of energy from one molecule to another, is slowed down by common insulating materials. The term "R value" refers to resistance to heat flow. Consider a cast iron skillet that has been placed over an open flame. The pot handle gets too hot to touch after a while; this is a conductive heat flow. However, many insulating solutions are ineffective at preventing heat transfer through moving air. As the temperature rises, hot air looks for ways to escape into the attic or outside. There are numerous ways for air conditioning to enter the attic, including electrical and plumbing penetrations, as well as chimney and chimney vents. As part of a larger insulation effort, such openings should be sealed.

Built-in lighting requires special care. Some recessed fixtures have overhangs that cannot be covered with insulation, requiring a three-inch gap between the fixture and the insulation, a scenario that wastes a lot of energy. Choose lights rated for insulation contact (designated IC) instead, meaning the bulb can be in contact with or even covered by insulation. ICAT rated luminaires go a step further by incorporating airtight enclosures.

Pay attention to ventilation in the attic. So that moist air does not condense on building components, the space above the attic insulation must be ventilated to the outside. A combination of ridge openings and soffit openings is an excellent method. The soffit openings draw in outside air while the ridge openings exhaust it. Insulation should be kept out of soffit openings. The air is channeled through deflectors inserted between the ceiling beams.

Increased wall thickness

It's difficult to determine the quality of your wall insulation without drilling a series of holes in the exterior walls of your home. One possibility is to work with a contractor or energy auditor who uses a thermal imaging device. These are portable instruments that detect radiation in the form of heat loss from solid objects. They can help identify insulation gaps or the absence of insulation.

A contractor can remove pieces of siding and drill holes between wall studs to add insulation to a finished wall. It will fill the bays with a loose filler substance.

(Video) Vapor Barriers: Need one or not?

Use insulation under the siding if you plan to live in the house. Although the siding is only an inch thick, it helps to insulate the walls. Perhaps most importantly, cladding helps prevent thermal bridging or heat loss through wall joists. The insulation between the studs conducts heat faster than wooden or metal studs, so the insulated coating helps prevent heat loss.

Areas that are often overlooked

The heated and cooled living room must be shrouded in insulation in an energy efficient home. The attic and exterior walls are obvious places to start, but there are others as well:

Basement walls. Finished basement walls must be insulated. One method is to apply firm foam insulation to concrete walls and then drywall over the insulation. Another option is to lay the foam first and then build a 2x4 stud wall with fiberglass or cellulose insulation. Electrical and plumbing lines can pass through the 2x4 wall.

Edge beams are beams that wrap around the outside of the building. These joists, also known as perimeter joists, form the framework for the floor joists. They usually connect the foundation and structure of a house. Install a rigid foam board cut to fit between the floor joists to insulate them. Close the edges with expandable tin foam, which will insulate and seal the space at the same time.

Crawl spaces that are not heated. There is some disagreement about how to proceed with this project. Tracking areas have already been ventilated outdoors and insulated with fiberglass blankets on the floor above them. However, many people now believe that underground areas should be sealed off and exterior walls and edge beams insulated with rigid foam panels. In addition, the passage must be integrated into the conditioned space of the house. Consult a qualified contractor about this project. If you have any current problems, he will identify them and recommend solutions.

Insulation placed correctly and in the right places can help a home's energy efficiency.

Return on investment in insulation

Every time we spend money on our lives, homes and hobbies these days, we worry about the return on investment. Investing in quality insulation installed correctly is a great way to get the most out of your investment. Quality insulation makes your home more energy efficient and improves home value.

(Video) Here's the Inexpensive Way to Up Your Home's Insulation

Plus, insulation makes your home more comfortable and reduces the strain on your HVAC system. This leads to reduced energy costs that add up to big savings! So the insulation costs to install, but the savings more than make up for your investment and even save you money on utility costs.

Phoenix Valley Insulation Contractors

if you are lookinginsulation contractors in phoenix valley, we can help! As a leading insulation installer, we offer your preferred type of insulation that best fits your home and your budget. For more information on how much it would cost to insulate your home, call us to discuss the size of your home, what areas you would like to insulate, and what type of insulation will work best.

Call today for more information at602-499-2922

(Video) How Much Does Insulation Cost?


How much does it cost to insulate a 1000 sq ft house? ›

Blown-in wall insulation costs range from around $1,000 to $1,500 per 1,000 square feet of actual wall space (not floor space).

What is the price to insulate a house? ›

The average cost of home insulation is between $3,000 and $10,000 for a 2,000 square foot home or between $1.50 and $5.00 per square foot.

What is the cheapest way to insulate a house? ›

The most common form of home insulation is the “batt and roll” or “blanket” type, which is the least expensive to purchase and install. Its most common material is fiberglass, but if you're looking for an alternative, check out these natural fiber options: Mineral wool. Cotton (recycled denim)

How much does it cost to insulate a 1400 square foot house? ›

Expect to pay between $0.25 and $2 per inch of thickness per square foot (one board foot) or $1 to $5 per square foot. The ROI on insulation is at 100 percent or more, and it's considered one of the best investments homeowners can make to their home.

Which is better spray foam vs blown-in insulation? ›

Both types offer excellent attic insulation and both types will resist fire, moisture, and mold. Spray foam insulation has the highest R-value, but it comes at a cost—you can achieve the same outcome with blown-in fiberglass for a much lower price.

How many inches of insulation does a house need? ›

Insulation levels are specified by R-Value. R-Value is a measure of insulation's ability to resist heat flow. The higher the R-Value, the better the thermal performance of the insulation. The recommended level for most attics is to insulate to R-38 or about 10 to 14 inches, depending on insulation type.

What is the most efficient way to insulate a house? ›

Spray foam insulation is the most energy-efficient insulation to create an air barrier in the attic. Certain spray foams can expand up to 100 times its original size, so it fills all of the nooks and crannies in the attic.

What is the average labor cost to install insulation? ›

You can generally expect to pay between $0.50 and $1.25 per square foot for installation. The total cost will depend on several factors. Access to wall cavities, type of insulation being installed and existing conditions will all affect labor pricing. Getting more than one bid for any project is recommended.

How much does it cost to insulate a 1200 square foot house? ›

It costs on average $7,900 to have a professional remove and replace insulation in an older 2,000 square foot home.
Cost To Insulate a House: At a Glance.
House SizeAverage Cost
1,000 sq. ft.$1,650 – $15,000
1,200 sq. ft.$1,980 – $16,500
1,500 sq. ft.$2,475 – $18,000
3 more rows
Oct 31, 2022

What time of year is insulation cheapest? ›

Insulation sells all year round, but now that you know why Fall is the best time, you can keep an eye out for sale prices on insulation, and then install it when you and the weather are ready.

Can I get my house insulated for free? ›

You are likely to be eligible for 100% funding for insulation grants if you or anybody in your home are in receipt of one or more of the following benefits: Armed forces independence payment. Attendance allowance. Carer's allowance.

Can you insulate your house too much? ›

It is possible to over-insulate your house so much that it can't breathe. The whole point of home insulation is to tightly seal your home's interior. But if it becomes too tightly sealed with too many layers of insulation, moisture can get trapped inside those layers. That's when mold starts to grow.

What is best insulation for exterior walls? ›

Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces.

What is the cheapest insulation to install? ›

Fiberglass batts are the cheapest type of insulation. The batting is packaged in rolls of standard thickness, with a typical length of 16 inches or 24 inches, making them the perfect fit for joists and studs when considering new construction of areas with little or no obstructions.

Is whole house insulation worth it? ›

"A well-insulated house will make you more comfortable in every season. And it's quieter, too." The EPA estimates that the average homeowner can save 15% on heating and cooling costs (11% of total energy costs) by adding insulation in attics, crawl spaces, and basement rim joists.

What is the downside to foam insulation? ›

On the downside, spray foam insulation comes at a price that is considerably more expensive than fiberglass. Often times, spray foam is triple the price of fiberglass and sometimes it can be more. Applying spray foam insulation is also something that is not advised to do by yourself unless it is a very small job.

Can mold grow on spray foam insulation? ›

As a product, spray foam insulation does not attract mold. And unlike wood or metal, spray foam does not rot, rust or deteriorate. This means that an area properly sprayed with foam insulation will never become a food source or a hospitable environment for a mold colony.

When should you not use spray foam insulation? ›

DON'T use expanding foam around outlets and recessed can lights. In the quest for a draft-free home, it's natural to want to add some insulation around electrical outlets, but expanding foam might not be the best type of insulation there.

Is there a tax deduction for insulation? ›

Federal Tax Credits

If you add to your home's insulation before December 31, 2022, you can receive a tax credit of 10% of the material cost up to $500. Starting January 1, 2023, the tax credit has been increased to 30% of the insulation and air sealing material costs up to $1,200.

Does insulation need a vapor barrier? ›

Vapor barriers—sheets of plastic or kraft paper—keep water vapor out of the wall cavity, so the insulation stays dry. Not every type of insulation needs a vapor barrier. But if it does, the barrier should face inside in northern, heating climates, and outside in humid southern climates.

How many years does insulation last in a house? ›

Unless damaged, it can last 80 to 100 years in most houses before it needs to be replaced. However, insulation can start falling from fiberglass batts after 15 to 20 years, so if your insulation was installed in batts well over a decade ago, it might be time for an inspection or a home energy audit.

What is the most important part of a house to insulate? ›

Attic. Arguably the most important space in the home to insulate is the attic. This is primarily because heat naturally rises, which means that the attic will hold a lot of the heat generated in the home. During the winter, having that heat escape through the attic will push up energy bills.

What part of a house should you insulate first? ›

Since warm air has a tendency to rise and cool air to fall, insulating the attic is the place to start. If the attic is unfinished, the insulation should be installed on the floor. If the attic is used as a living space, say a home office or play room, the insulation should be placed between the rafters.

What is the world's best insulation? ›

Aerogel, known as the “world's best insulating solid material,” is used to enhance the thermal performance of energy-saving materials and sustainable products for buildings, on- and off-shore industrial infrastructure and consumer products, as well as acting as a high performance additive to coatings and personal care ...

Is it cheaper to insulate myself? ›

Costs vary significantly by size of the home, location and accessibility of added insulation, etc., but you can expect the cost of a professional job to be two or three times more than just the cost of the materials you'd need to do it yourself if you purchase fiberglass or mineral wool insulation.

How much does 400 sq ft of insulation cost? ›

Room Insulation Costs
ItemUnit CostLine Cost
Blown-in insulation$2.00-$3.00 per sq.ft.$400-$600
Spray foam insulation$0.50-$2.00 per sq.ft.$100-$400
Material Cost$0.50-$3 per sq.ft.$100-$600
Labor Cost$180-$300 per hour$540-$1200
4 more rows

How much insulation do I need for 1000 sq ft? ›

For example, if the square footage of the room you're planning on insulating is 1,000 square feet and you want to achieve an R-value of 60, you will need approximately 17 bags to fully insulate your room.

How much does it cost to insulate exterior walls? ›

How Much Does It Cost to Foam Insulate Existing Walls? Typically when someone has their existing walls insulated, they do all of the exterior walls to seal up the building envelope. The cost of doing all four of the exterior walls could range anywhere from $4,000 to $8,000, depending on a variety of factors.

What is the cheapest insulation per square foot? ›

Fiberglass batts is just about the cheapest option to insulate a building when the wall cavities area open, like an attic. However, fiberglass batts are one of the poorest air sealers. Fiberglass batts cost between $1.10 and $3.50 per square foot.

How do you insulate a house with existing walls? ›

To add insulation to any exterior wall, holes are drilled between the studs of the existing walls. Then, spray foam, cellulose, or another form of loose-fill can be blown in to fill up the wall cavities. Finally, the holes must be plugged up and refinished to match the rest of the wall.

How can I save money on insulation? ›

In an attic or under a floor, where there is more room, you can boost the insulation value of a lower-rated material simply by using a thicker layer. As a rule, the more insulation you add, the more money you'll save.

Can you add new insulation over old? ›

You can absolutely new insulation over old insulation… as long as it isn't wet. Energy Star advises as follows: “If it… appears that the insulation [is wet or] has previously been wet, you should look for the cause and repair the problem to prevent a reoccurrence. Remove any wet insulation.

Which is better attic insulation blown or rolled? ›

rolled insulation is a much more efficient process. Blown insulation does require a machine to be used, but a machine and some workers are easier to manage when you compare the rolled insulation process.

Who qualifies for free insulation? ›

If a homeowner is in receipt of a qualifying benefit the government could provide the funding needed to insulate their property. Grants are available to cover the entire cost of the process and are available to homeowners who are receiving income related benefits, disability related benefits or tax credits.

How do I get a government grant for insulation? ›

To apply you need to:
  1. live in Greater London.
  2. own or rent your own home, landlords can apply as long as the tenant is eligible.
  3. Are in receipt of a means-tested benefit OR have a low household income (less than £20,000 a year after rent/mortgage and council tax deductions)
  4. Have a property EPC rating of D, E, F and G*

Who is entitled to insulation grants? ›

Who is eligible for an Insulation Grant? If you're a homeowner or a private renter (with permission from the landlord) who receives qualifying benefits, you could be entitled to an insulation grant from the Government. You must also be in receipt of one of the following benefits: Armed Forces Independence Payment.

Where should you not put insulation? ›

Never place insulation close to water heaters, oil burners or anything hot. The backing is especially flammable and will be a major fire hazard for your home.

Is it better to insulate inside or outside of house? ›

External wall insulation is the best way to insulate your walls. External insulation involves fixing insulation materials such as mineral wool or expanded polystyrene slabs to the outer surface of the wall.

Should I insulate my 100 year old house? ›

Insulating older homes is an all-or-nothing proposition. Just blowing insulation into the walls can create moisture problems that will rot the wood structure from the inside out.

What are the problems with external wall insulation? ›

Common problems include damp patches appearing on walls, mould growth, and cracking or bulging of the render or brickwork. Problems can also occur if the insulation is not properly protected from the weather, or if it is installed on a property that is not suitable for it.

Can you insulate exterior walls without removing drywall? ›

Thankfully, the answer is yes. We're going to help you save time and money by showing you how to install spray foam insulation in your home without removing drywall.

What insulation is easiest to install? ›

Reflective Insulation

It is very DIY-friendly and installed between the joists and beams in the attic, where most of that heat enters your home. While reflective insulation is one of the easiest to install yourself, it is limited to use in warmer climates as it has minimal thermal insulating qualities.

What is the cheapest way to insulate exterior walls? ›

Fiberglass Insulation

While fiberglass does work to slow down the spread of hot and cold air, it still allows for air movement into and out of the home. Fiberglass is a fairly inexpensive insulation option for your exterior walls, and you can install it yourself if you feel confident in your skills.

What is the average price to insulate a house? ›

Average Insulation Installation Costs in 2023

The square footage of your home will also affect costs, with average installations costing $1 – $5.65 per square foot or $0.55 – $2 per board foot. Labor costs range from $0.50 – $1.60 per square foot.

Should old homes be insulated? ›

Unless your home was specially constructed for energy efficiency, you can probably reduce your energy bills by adding more insulation. Many older homes have less insulation than homes built today, but even adding insulation to a newer home can pay for itself within a few years.

How much insulation do I need for 1000 square feet? ›

For example, if the square footage of the room you're planning on insulating is 1,000 square feet and you want to achieve an R-value of 60, you will need approximately 17 bags to fully insulate your room.

How much blown in insulation do I need for 1000 sq ft? ›

On the insulation manufacturers label on every bag you'll find that for an R-25 you'll need 28 bags per 1000 sq ft. So if you have 2100 sq ft, take 28 x 2 = 56 bags for 2000 sq ft.

How do you calculate labor cost for insulation? ›

You can generally expect to pay between $0.50 and $1.25 per square foot for installation. The total cost will depend on several factors. Access to wall cavities, type of insulation being installed and existing conditions will all affect labor pricing. Getting more than one bid for any project is recommended.

How do I calculate how much insulation I need? ›

To calculate how much insulation material to purchase, simply divide your attic's square footage by the square footage of insulation in the manufacturer's package (assuming you're purchasing pre-cut batts or rolls).

How many bags of insulation do I need for 1500 square feet? ›

More on Calculating Insulation Needs

Divide the measured square footage you obtained by 1,000 square feet to obtain the multiplication factor: 1,500 square feet/1,000 square feet = 1.5. Multiply the R-value chart number to obtain the number of bags (rounding up at the end): 40.8 * 1.5 = 61.2 or 62 bundles.

Which is better cellulose or fiberglass insulation? ›

At 3.5 per inch of material, the R-value of blown-in cellulose is 23% better per inch than fiberglass batts! According to research done at the Oak Ridge National Lab, fiberglass loses up to 50% of its R-value in very cold conditions; making cellulose a better choice for homes in northern climates.

What R rated insulation should I use? ›

Depending on where you live and the part of your home you're insulating (walls, crawlspace, attic, etc.), you'll need a different R-Value. Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces.

What is the best way to insulate an existing house? ›

Spray foam and injection foam are the best options when it comes to making your home energy efficient and comfortable. Traditional insulation won't give you the needed air barrier you need to keep your treated air inside and the outside temperatures out where they belong.

What is the most important insulation in a house? ›

Attic Insulation

Almost all home energy experts in Colorado agree: the attic is the single most important site for insulation in the home. Hot air rises, so during the winter months, all of your heated interior air naturally travels up toward the attic.

Can you put too much insulation in a house? ›

It is possible to over-insulate your house so much that it can't breathe. The whole point of home insulation is to tightly seal your home's interior. But if it becomes too tightly sealed with too many layers of insulation, moisture can get trapped inside those layers. That's when mold starts to grow.


1. External Wall Insulation ~ The Ugly Truth?
(Skill Builder)
2. Do Radiant Barriers Work? - LP Techshield Review
(Jordan Smith)
3. Do Radiant Barriers Work & How Much Energy Will it Save: Real Home Owners Experience (Before/After)
(Gray House Studio)
4. I’m recommending we NOT INSULATE This Old House
(Matt Risinger)
5. Spray Foam Insulation — The Ugly Truth?
(Skill Builder)
6. How to install Ceiling Insulation in a Basement or Crawlspace & why you should. R30, R21, R19, R13.
(C.L.S. All-IN-ONE)
Top Articles
Latest Posts
Article information

Author: Duncan Muller

Last Updated: 03/19/2023

Views: 6078

Rating: 4.9 / 5 (79 voted)

Reviews: 94% of readers found this page helpful

Author information

Name: Duncan Muller

Birthday: 1997-01-13

Address: Apt. 505 914 Phillip Crossroad, O'Konborough, NV 62411

Phone: +8555305800947

Job: Construction Agent

Hobby: Shopping, Table tennis, Snowboarding, Rafting, Motor sports, Homebrewing, Taxidermy

Introduction: My name is Duncan Muller, I am a enchanting, good, gentle, modern, tasty, nice, elegant person who loves writing and wants to share my knowledge and understanding with you.