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T.C. Insulating Company was first established in 1972 in Grand Rapids, MI and is now headquartered in Grawn, MI . Throughout the company's long history, T.C. Insulating has been committed to offering the best products available and installing these products to the highest possible standards.

T.C. Insulating Company is a customer-oriented business that provides both cellulose and foam insulation that can be used in walls and attics of new and existing homes or structures.  Over the years T.C. Insulating Company has built a well-known reputation for quality, and the ability to complete each project in a timely fashion.  Either in residential or commercial properties, our proven guarantee is to stand behind all our work .  

Providing good service means taking the time to listen. We will work with you every step of the way to make sure you receive the services you need. If you have additional questions about us or the products and services we provide, please contact us by phone or email. 

We look forward to working with you.

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Guaranteed Energy Program

Nu-Wool Premium Cellulose Insulation outperforms conventional insulation. Nu-Wool guarantees it.

TC Insulating Co. is a certified Nu-Wool WALLSEAL Dealer. Through TC Insulating Co., Nu-Wool Co., Inc. offers a Guaranteed Energy Program for new houses insulated with Nu-Wool Insulation, at no cost th the home owner or builder.  This energy guarantee not only ensures savings on fuel bills it can help home buyers add upgrades to their home without adding cost. Under this program, a home's heating and/or cooling bill is guaranteed for a period of three years.  If the energy bills exceed the guaranteed amount, Nu-Wool will reimburse the homeowner 50% of the overage.  Builders can use this guarantee as an attractive selling feature to home buyers.

How is Nu-Wool WALLSEAL® different from other insulation materials?
Nu-Wool WALLSEAL is sprayed in place, eliminating the voids and air pockets common with other insulation materials. Density, or weight per cubic foot, which is important in reducing air infiltration and increasing "Effective R-value", is more consistent with the Nu-Wool WALLSEAL system. The contractor and the customer can actually see the insulation in place and know that all of the areas in a wall are insulated.

How does Nu-Wool WALLSEAL compare in performance to other insulation products?
Using Nu-Wool Premium Cellulose Insulation is more than a smart choice for it’s comfort benefits, Nu-Wool is environmentally friendly even in the manufacturing process. Fiberglass insulation is made by melting sand and recovered glass in gas-fired furnaces. It takes at least 8,500 BTU’s of energy to produce a pound of fiberglass insulation. Cellulose insulation is produced by processing post-consumer recovered paper through electrically driven mills. Estimates for the embodied energy of a pound of cellulose vary from 150 to 750 BTU’s. Converting this to BTU’s-per-R, it takes at least 10 times more energy to make fiberglass insulation than to produce cellulose insulation.

Nu-Wool WALLSEAL is a premium insulation system. Homeowners, builders, and architects choosing this system are concerned about energy costs, sound control, and overall comfort. The installers of the WALLSEAL system are factory trained and certified professionals, and are equipped with specialized machines designed for this application. The increased efficiency of the Nu-Wool WALLSEAL system, along with Nu-Wool Premium Cellulose Insulation in the attic, saves homeowners as much as 40%* on heating and cooling costs.

How does WALLSEAL compare in cost to other insulation products?
Nu-Wool WALLSEAL is a premium insulation system. Homeowners using this system are concerned about their comfort level as well as energy costs.  The additional up front cost of the WALLSEAL system is quickly offset by the energy savings generated by this insulation, as much as 40%* on heating & cooling bills.



Many insulation manufacturers claim to make a superior product, but the proof is in the performance. Nu-Wool WALLSEAL is a spray-in-place, energy-saving cellulose insulation. Using Nu-Wool Premium Cellulose Insulation eliminates the voids and air pockets common with other insulation materials. In fact, you may save as much as 40%* on your heating and cooling bills by choosing Nu-Wool Premium Cellulose Insulation when you build.
Guaranteed Savings
Nu-Wool offers home buyers a three year guarantee on the amount of energy bills when Nu-Wool is properly installed by a certified Nu-Wool contractor.

Compare The Benefits
Review the Comparison Guide to help with your next insulation decision. You'll see why Nu-Wool Premium Cellulose Insulation is installed more and more in new and existing homes!

Superior Performance
Installed in both attics and walls in residential and commercial structures, Nu-Wool has a high R-value, offers superior thermal and air-filtration properties, defends against mold growth and even dramatically reduces noise transmission through floors and walls. NuWool WALLSEAL is UL - Listed, with an EPA Five Star Energy Program labels.

Nu-Wool's contractor training and field support is the best in the industry. Using Nu-Wool Premium Cellulose Insulation results in energy savings of up to 40%* over conventional insulation materials.
Environmentally Friendly
Made from 100% recycled newspaper, Nu-Wool is environmentally friendly. Nu-Wool processes over 150 tons of recycled paper each business day – that's the equivalent of 2,550 trees per day!

If you would like more information about Nu-Wool Premium Cellulose Insulation, please visit



A superior spray-in-place insulation foam providing significant benefits to the homeowner over traditional insulating materials including a dramatic improvement in energy efficiency, increased structural integrity, greater comfort, healthier air, and a quieter environment.

Building scientists say that a home should be as tight and seamless as possible.  Yet, a typical 2,500 square foot home has over a 1/2 mile of cracks and crevices* (Air Barrier Asso. of America, 2005) resulting in a great range of problems most homeowners have come to accept.  You can demand better.  You can insist on Sprayed Polyurethane Foam.

Unlike fiberglass, Sprayed Polyurethane Foam Insulation expands on contact forming an airtight seal eliminating convection currents, the number one source of heat loss; helping maintain a comfortable, constant temperature throughout the home. 

High R-Value
Sprayed polyurethane foam has an aged R-value of approximately 6.5 per 1 inch thickness 

Monthly energy and utility savings of 40% or greater can be achieved when compared to conventional insulation . The cost of  sprayed polyurethane foam  can often be recovered in less than 5 years, simply through energy savings alone.



What is the Difference between Open-cell and Closed-cell Polyurethane Foams? 
When it comes time to actually put the foam product in your home or commercial building structure, you must identify whether you will use .05 lb./cu. ft., open cell foam, or 2.0 lb./cu. ft. closed cell foam. This makes a big difference in cost, application methods, and performance.

With the open-cell vs. closed-cell issue, there are two major factors to understand and consider. The first is the nature of the foam. It is either open-cell foam, where the tiny cells of the foam are not completely closed. They are broken and air fills all of the “open” space inside the material. This makes the foam weaker or softer feeling than closed-cell foam.

Closed-cell foam differs in that all of its tiny foam cells are closed and packed together. They are filled with a gas that helps the foam rise and expand and become a greater insulator. These cells can be formulated to obtain many characteristics, the most common being size and density.

Density is measured by weighing one solid cubic foot of foam material. Open cell foams typically weigh in at 0.4 to 0.5 lb./cu. ft. Closed cell foam for insulation applications range in density from 1.7 lb./cu. ft. to 2.0 lb./cu. ft. Roofing applications typically use a 2.8 to 3.0+ lb./cu. ft. to support traffic and loads better. The higher the density the foam, the heavier, or stronger it becomes. Some polyurethane foams are molded into decorative interior molding and painted or stained for a simulated wood effect. These “higher density” foams are typically in the 30 lb./cu. ft. to 40 lb./cu. ft. density range.

The advantages of closed-cell foam compared to open-cell foam include its strength, higher R-value, and its greater resistance to the leakage of air or water vapor. The disadvantage of the closed-cell foam is that it is denser, requires more material, and therefore, is more expensive. Even though it has a better R-value, typically the cost per R is still higher than open-cell foam. The choice of foam can also be based on the requirements for the other performance or application specific characteristics such as strength, vapor control, available space, etc.  Open-cell SPF has an R-value around 3.5 per inch and typically uses water as the blowing agent.  Closed-cell SPF has an R-value of around 6.0 per inch (aged R-value) and uses high R-value blowing agents.

Both types of foam are commonly used in most building applications and the choice for which to use can depend on many of the factors discussed above. Some foams are inappropriate in specific applications. For example, you typically would not use open-cell foam below grade or in flotation applications where it could absorb water; this would negate its thermal performance because water is a poor insulator compared to air. Closed-cell foam would be a good choice where small framing sizes need the greatest R-value per inch possible. Closed-cell foam would be used for roofing applications.

Always contact your material supplier for performance and application data on their specific materials. What type of foam being used in your building or home is always a good issue to discuss  up front, before the job starts.

We look forward to working with you.
T.C. Insulating Company Hours:
Monday - Friday
7:00 am - 3:00 pm

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1355 McGregor Way, Grawn, MI 49637, USA


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Employment Opportunities

We have Job Opportunities always available for FULL TIME insulation installers. No experience necessary. We will train! All you need is a VALID drivers licence and a willingness to learn.

Please come into our location during office hours and fill out an application at 1355 McGregor Way Grawn, MI  between the hours of 7 am - 3 pm.

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