How Much Does It Cost To Insulate A 1,500 Square Foot House?

Homeowners should prepare the money to insulate their houses. But how much cash should you prepare to insulate your 1,500 square foot house? And what if you have a 2,000 square foot home? We consulted with different experts, including those in the construction industry, to give you the answers to those questions.

Insulating costs can range from $0.65 to $6.50 per square foot. Therefore, homeowners with 1,500 square foot homes should expect to spend approximately $975 to $11,250 to insulate the interiors of their lots. For 2,000 square foot properties, you should expect to pay more (about $1,300 to $15,000) because of the larger space requirements.

Take note that different factors go into the overall fees associated with adding comfortable temperatures to residences. These elements can include the type of insulation used and the location of the property. Keep reading ahead to learn more about these prices in greater detail.

man cutting and Installing thermal insulation layer. How Much Does It Cost To Insulate A 1,500 Square Foot House

Home Insulation Costs For A 1,500 Square Foot House

Property owners should expect to spend about $975 to $11,250 to insulate a 1,500-square foot home. Take note that insulation costs may vary and can increase or decrease, depending on whether the insulation comes during or after the construction of the house.

Man laying thermal insulation layer under the roof. How Much Does It Cost To Insulate A 1,500 Square Foot House

Here’s a preview of the average price range for the two insulation installation scenarios:

  • New construction: $0.65 to $6.50 per square foot
  • Existing walls: $1.75 to $7.50 per square foot

Moreover, the prices may also vary based on the type of insulation used. These fees can include:

  • Batt: $0.65 to $2 per square foot
  • Blown-in: $1.65 to $3.80 per square foot
  • Foam board: $2.40 to $3.75 per square foot
  • Spray foam: $3.15 to $7.50 per square foot
  • Rigid board: $5.75 to $15 per square foot

Manufacturers may also play their hands in creating dissimilar prices for the insulation. Insulation brands often have varying prices for their products, which can be due to the primary material used in product development. Some of these materials are the following:

  • Fiberglass: $0.40 to $1.50 per square foot
  • Cellulose: $0.60 to $2.30 per square foot
  • Polystyrene: $1 to $15 per square foot
  • Blue Jean: $1.15 to $1.75 per square foot
  • Rockwool: $1.40 to $4 per square foot
  • Sheep Wool: $1.50 to $2.80 per square foot

Aside from the materials used and the type of insulation, other factors that can affect the overall costs of cushioning a home’s infrastructure are lot inspections, property location, and installations by professional labor.

Additionally, the accrued fees can differ depending on the location of the insulation installation. For example, padding a basement ceiling to protect the space from cold weather may have lesser costs as compared to insulating the entire house.

Check out the following post to learn more about implementing comfortable temperature to a basement: Does A Basement Ceiling Need Insulation?

How Much Does It Cost To Insulate A 2,000 Square Foot House?

It would cost owners roughly $1,300 to $15,000 to insulate a 2,000 square foot house. The calculation to achieve that approximate range uses the same price range mentioned in the section above.

Therefore, insulating a new 2,000 square foot home requires around $1,300 to $13,000. On the other hand, homeowners should expect to pay about $3,500 to $15,000 to add insulation to pre-existing walls.

What Is The Cheapest Way To Insulate A House?

rolls of Thermal insulation material

Homeowners can reduce expenses for their house insulation projects by taking note of certain factors, which include:

Type of Insulation

Certain kinds of insulation are less expensive than others. For example, batts often have smaller price tags than rigid boards. But rigid boards often provide additional benefits such as soundproofing and moisture resistance.


Stack of fiberglass insulation material

Fiberglass is one of the least expensive materials to use for insulation, and you can generally find it in batts. However, make sure to provide extra care as fiberglass batts are susceptible to trapping moisture.

You may also think about using fairly inexpensive textiles, particularly those with fireproof and insect-proof traits.

Professional Labor

Save money by installing the insulation materials without professional assistance. However, if you’re not confident with your DIY skills, expert help might be a necessity. If so, get ready to spend about $0.25 to $0.50 to put insulation in your home.

The prices of skilled services can also increase with the type of insulation used. Installing spray foam insulation often requires more preparation than using fiberglass batts. As a result, the fees for using professional aid to add spray foam insulation are usually higher than setting up batts.

Still, the expenses for DIY insulation installations may need more money than usual if you still need to purchase specific gear. Buying safety equipment and tools like a stapling tool and caulking gun can add to the overall costs.

Click here to see this Supermore anti-fog protective safety goggles on Amazon.

Does Insulation Work Right Away?

Insulation generally works immediately as the items placed in strategic locations around houses act as shields to resist uncomfortable temperatures from entering. However, the time it takes for the insulation to provide its thermal benefits often depends on the quickness of the setup.

For instance, it takes roughly 2 to 5 hours to inject foam insulation into existing walls. During this injection period, the temperature within the space will slowly become cozier over time.

On the other hand, installing foam insulation in an attic should take about 1 to 2 days to complete. While the injecting is still ongoing, individuals within the immediate vicinity should feel the temperature becoming more comfortable over time, albeit at a fairly slow pace.

House attic insulation and renovation

How Long Does It Take To Insulate A New House?

The length of time required to insulate a new house depends on its size. For a 1,500 square foot home, insulation should be finished faster than a 2,000 square foot establishment.

The type of insulation used will also affect the amount of time required to finish the installation. For instance, setting up a section of a home with insulation batts takes about a day to complete. However, the operation can be completed faster if the homeowner decides to use foam insulation instead.

Read this post to learn more about the insulation installation time frame: How Long Does It Take To Insulate A New House?

How Much Insulation Is Required In A House?

The amount of insulation needed for a house is reliant on specific spaces. Some locations need more R-Value, which is the measurement for the ability of an insulating product to resist heat flow. Generally, rooms that require more heat need more insulation products with higher R-Values.

Here’s a quick guide to help you determine the average amount of insulation needed for specific places around a property:

  • Attic: R30 to R60
  • Cathedral ceiling: R22 to R15
  • Wall cavity: R13 to R21
  • Floor: R13 to R30

Furthermore, some states need more insulation for their lots than others. Alaska and nearby regions usually require more heating in their properties than those in Hawaii or Puerto Rico.

Can You Over Insulate A House?

Over-insulation is a possibility. Adding more insulating products than recommended can significantly reduce breathability in residences.

Fibreglass insulation installed in the sloping ceiling of a new frame house

Take note that the purpose of insulating a house is to seal the interiors to reduce uncomfortable temperatures. But tightening the home significantly by using more insulation layers than suggested will promote additional moisture. In turn, it creates the ideal living and spreading environment for things like mold, mildew, and certain insects.

Does Insulating A House Add Value?

Insulating a house increases the property’s value. For instance, take note of the 2016 Cost vs. Value Report from Remodeling Magazine that homeowners saw an increase of 116.9% in their houses’ market value by adding attic insulation alone.

Therefore, if a conventional insulation project for an attic costs about $1,268, lot owners should expect to receive $1,482 in returns on average from selling the property.

Still, the profitability of the insulation project is subject to the location of the lot. Homes in the Pacific and West South Central regions are likely to see more returns on their investments than in other locations.

Insulation rolls in yellow packaging in the attic of a wooden house. ready to use. How Much Does It Cost To Insulate A 1,500 Square Foot House

Final Thoughts

Homeowners should prepare to spend about $975 to $11,250 to insulate their 1,500 square foot houses. Larger houses, such as 2,000 square foot residences, need more insulation and therefore require additional expenses for their thermal assembly projects.

Despite the fairly large costs, homeowners and their guests can take advantage of better heating conditions during different weather, particularly in the summer and winter seasons. Additionally, adding insulation can increase a home’s value, providing additional returns to the investments of lot sellers.

But be careful as it's still possible to over-insulate a house. In such a situation, the home becomes stuffy as the extra insulation restricts airflow. Moisture-related problems, such as mold and mildew growth, can also become more apparent than average if you add more insulation than necessary.

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