How Insulation Works

Eldon & Son´s Insulation

Go Green with Cellulose Insulation. The results are a cooler house in the summer, warmer home in the winter, and lower energy bills. Insulation serves as a thermally resistant barrier which inhibits the migration of thermal energy into and out of the house. In simple terms: insulation blocks heat from entering the house in the summer and holds heat in during the winter.


During the summer the suns powerful rays radiate down onto our homes, the walls heat up and the temperature in the attic can rise to nearly 180 degrees. This heat enters the home and causes things to become quite uncomfortable. You then have two choices….turn on the air conditioning and watch the electric meter spin….or suffer with the heat.

By turning on your air conditioning you essentially pump heat out of your home, but often the air conditioning can only keep up with the heat entering the home. Customers often complain of an air conditioning system that runs all day and never cools the house below 80 degrees….this is typical of a poorly insulated home. The solution is to reduce the heat coming into the home to start with. Insulation installed in your attic and walls will dramatically reduce the amount of heat infiltrating into your home; the house stays cooler, the air conditioning runs less often.

Eldon & Son´s Insulation Installation


Insulation works equally well in the winter, it’s amazingly effective when it comes to retaining heat. Just as insulation can block heat from entering the home in the summer, it works in the same way to keep the heat contained within the home during the winter. Homeowners frequently complain of cold homes and furnaces that never turn off….the heat escaping about as fast as the heater can produce heat. Once insulated, heat is retained within the home for hours longer. The result is a warmer home that uses less energy to stay warm.

An additional benefit to an insulated home is that the air does not get processed as much through your furnace system, this means the air does not get dried out. Insulation also serves to reduce outside sound from entering the home. People near airports and schools often report dramatically less outside sound infiltrating.

Eldon & Son´s Cellulose Insulation


Fiberglass is available in two forms: as batting (rolls) or as a loose-fill (blown) material. Many homeowners typically feel they want rolled insulation, but once they do the research they find otherwise. Fiberglass insulation, whether rolled or blown, has several negative characteristics of great concern. Please research before using fiberglass. Also, see our section on Fiberglass vs. Cellulose for much more comparative info.


Cellulose is only available as a loose-fill (blown) material. We consider it the most effective, efficient, longest-lasting and safest material you can use. Cellulose has many advantages over fiberglass; it has a lifetime warranty, is permanently non-flammable and proven resistant to both insects and rodents. It also has soundproofing qualities and does not itch. Best of all, cellulose is non-toxic, safe and environmentally friendly. Typically it costs less then fiberglass.

Information provided to us by CIMA states that cellulose insulation uses 10 to 64 times less embodied energy than other common insulation products. Architects and builders can also earn credits towards certification under both the LEED and US Green Building green-building programs when using cellulose insulation. Also, according to CIMA, cellulose insulation makes a home 36% tighter due to the fact it creates a 100% seamless seal and performs best when there are extreme differences between inside and outside temperatures.

Blown vs Rolls (Batting)

Fiberglass rolls (or batts) are useful in that they can be hung under floors or in open-framed walls of a home. Attics, however, can be either be rolled with batting OR blown with a loose-fill (fiberglass or cellulose) material. A blown application offers several advantages over batting.

Many homeowners assume batting is better, or they’re drawn to what appears to be a cleaner job. Some homeowners are directed by their trusty contractor and others just feel a sense a familiarity towards the rolls. The truth of the matter is that rolled fiberglass is often installed during construction merely because it is convenient. When homeowners, contractors or architects do some research, cellulose blown insulation easily emerges as the best choice of materials.

The downfall of batting is that it must be placed between each ceiling joist, sometimes fitting tightly, sometimes loosely. Batting must go over, under and around the many obstacles in the attic; this application compromises the performance of the insulation by creating gaps, voids and other “leaks“. The blown application seals and provides a much “tighter” blanket of insulation throughout the attic.