Average Costs

Average Costs Of Insulation

Average costs - $350 - $825

The average cost to hire a local professional can vary widely depending on the work that needs to be performed, they region in which you are located and how fast you need the project completed. So choosing the right professional the first time is of the essence.


Hourly Rate - Some companies charge by the hour.

Flat Rate Per Job -  Some companies charge a flat rate for the work they do.

Recognize that there are several variables in developing the price. These include: 

  • Time that it takes to complete the project.
  • How many technicians are working on your project.
  • Was it an after hours emergency
  • With many more aspects that may add to the cost

Remember, the company quoting a low rate may not necessarily be the right  company for you. Some  companies may offer low hourly rates, but then charge additional "fees" to complete the job. 

You may also need to consider that most  companies charge a higher rate for overtime, weekends, holidays and emergency calls.

The best rule of hand is to get an itemized estimate so you know exactly what is expected from the local company.

Determining The Cost Of Insulation

What kind of insulation is being installed? This will vary widely in the total cost of the installation. Remember! Cheaper is not always better.

What are the total square feet/area being installed? You want to cover as much area as possible
What is the labor to install the insulation. Hiring a professional insulation contractor will also provide you peace of mind knowing the job is done right the first time.

Different Types Of Insulation

Batt And Roll Insulation
Blanket insulation -- the most common and widely available type of insulation -- comes in the form of batts or rolls. It consists of flexible fibers, most commonly fiberglass. You also can find batts and rolls made from mineral (rock and slag) wool, plastic fibers, and natural fibers, such as cotton and sheep's wool. Learn more about these insulation materials.

Concrete Block Insulation
Concrete blocks are used to build foundations and walls, and there are several ways to insulate them. If the cores aren’t filled with steel and concrete for structural reasons, they can be filled with insulation. 

Foam Board Insulation
Foam boards -- rigid panels of insulation - Provide good thermal resistance, and reduce heat conduction through structural elements, like wood and steel studs. 

Radiant Barriers
Radiant barriers  work by reflecting radiant heat away from the living space. Radiant barriers are installed in homes -- usually in attics -- primarily to reduce summer heat gain, which helps lower cooling costs. 

Fiber Board Insulation
Fiber board insulation consists of either fiberglass or mineral wool material and is primarily used for insulating air ducts in homes. It is also used when there's a need for insulation that can withstand high temperatures.

Spray Foamed Insulation
Spray foam insulation materials can be sprayed, foamed-in-place, injected, or poured. Some installations can have twice the R-value per inch of traditional batt insulation.

Insulated Panel
Insulated panels are prefabricated insulated structural elements for use in building walls, ceilings, floors, and roofs. 

Loose Fill Blown-In Insulation
Loose-fill insulation consists of small particles of fiber, foam, or other materials. These small particles form an insulation material that can conform to any space without disturbing structures or finishes. This ability to conform makes loose-fill insulation well suited for retrofits and locations where it would be difficult to install other types of insulation.

  • Blown-In Fiberglass Insulation

Fiberglass insulation gains its insulating power by trapping air inside of the billions of tiny glass fibers.The air gets trapped inside air pockets and actually slows the transfer of heat through the space.

  • Blown-In Cellulose Insulation

In contrast to fiberglass insulation, cellulose insulation does not trap air in between it's fibers to control heat. By nature, the cells inside the cellulose insulation have their own insulating power.


Basic Information


An insulating material’s resistance to conductive heat flow is measured or rated in terms of its thermal resistance or R-value -- the higher the R-value, the greater the insulating effectiveness. The R-value depends on the type of insulation, its thickness, and its density. When calculating the R-value of a multilayered installation, add the R-values of the individual layers. Installing more insulation in your home increases the R-value and the resistance to heat flow. To determine how much insulation you need for your climate, use an insulation calculator or consult a local insulation contractor.

The effectiveness of an insulation material’s resistance to heat flow also depends on how and where the insulation is installed. For example, insulation that is compressed will not provide its full rated R-value. The overall R-value of a wall or ceiling will be somewhat different from the R-value of the insulation itself because heat flows more readily through studs, joists, and other building materials, in a phenomenon known as thermal bridging. In addition, insulation that fills building cavities densely enough to reduce airflow can also reduce convective heat loss.

The R-value for different types of insulation varies depending on the brand, how it was installed, and the region of the country you live in but here are some general comparisons.

Insulation Type:                    R-Value per Inch:

  • Fiberglass (loose)                      2 – 3
  • Fiberglass (batts)                    3 – 4
  • Cellulose (loose)                     3 – 4
  • Stone Wool (loose)                 2 – 3.5
  • Stone Wool (batts)                  3.5 – 4
  • Cotton (batts)                           3 – 4
  • Cementitious (foam)                2 – 4
  • Polyicynene (foam)                 3.5 – 4.5
  • Phenolic (foam)                       4.5 – 8
  • Polyisocyanurate (foam)         5.5 – 8
  • Polyurethane (foam)               5.5 – 8

How Much Insulation?

The amount of insulation recommended for your home is dependent on where you live, but here are some general guidelines:

Attic Insulation: 
Houses in a cold climate should have a minimum of R-49 in the attic, which is equivalent to approximately 16″ of insulation. Warmer climates only require an R-38 or higher, or about 12″.

Wall Insulation: 
While wall insulation is limited by its width, different materials provide higher or lower R-values. Fiberglass batts for standard and are available in low, medium, and high density products that range from R-11 to R-15. Sprayed foam insulation in the same wall cavity can range from an R-14 to an R-28 depending on the product that is used.

Floor Insulation: 
While there are additional considerations—such as venting and moisture—to take into account when you insulate under floors, the standard recommendation of R-25 rating in cold climates and an R-11 in warmer parts of the country.

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