Greenways Insulation - Syracuse & CNY Insulation Specialists

Blown-in Insulation

What is blown-in insulation?

Blown-in insulation, also called loose fill insulation, is commonly used to insulate existing structures that previously had no insulation, or where additional insulation is needed. It is made up of loose particles which are blown into an attic space to a depth that provides the desired R-Value of protection.

Blown-in attic insulation benefits

Using blown insulation has many advantages. It is fairly economical, and is much easier to install in hard-to-reach areas, as well as working around obstacles such as chimneys or stove vents. Blown insulation is eco-friendly because it makes use of recycled materials. It can be used as the primary type of insulation, or it can be added to other types of insulation to help fill in the gaps and provide an additional heat barrier.

  • Contains no formaldehydes
  • Resists the settling and gapping
  • Seamless installation, no gaps or voids
  • Flammability testing shows blow-in insulation resists combustion
  • Will not rot, mildew or promote the growth of mold
  • Has a superior noise reduction quality
  • Installs easily in existing structures
  • Will not irritate skin and lungs like other insulations that contain a lot of chemicals

Important additional step - Thermal Imaging and air sealing

Prior to installing any blow-in insulation in an attic space, it is imperitive to identify and seal all attic penetrations with expanding foam. All ceiling electrical boxes, wire penetrations, plumbing vent stacks, HVAC registers, smoke detector junction boxes etc., all allow the movement of air from the warm interior space to the cold attic, this air movement, although seamingly minute, can drastically reduce the R-value of any installed insulation. At Greenways we utilize thermal imaging equipment to locate and seal all problem penetrations to provide the best installation possible. For more on our thermal imaging services, Read More..

Got Icicles?

How Ice Dams Form

Ice dams are a major cause of water damage in the home. Inadequate insulation can cause warm air to escape from the inside of the home into the attic, warming the roof's underside. This elevated temperature causes the snow to melt and again re-freeze when it reaches the colder, below freezing edge of the roof. The thawing and re-freezing of the water, creates a "dam" that retains water and allows it to back up under the shingles and leak into the home causing wood rot, mold grown and destroyed sheetrock. The following steps work to eliminate ice dams and icicles.

  • Seal all attic penetrations (vent pipes, wires, lights) with foam sealant
  • Install roof ventilation trays
  • Install additional insulating material in the attic

Fiberglass Blown-In

Fiberglass (or fiber glass) -- which consists of extremely fine glass fibers -- is one of the most ubiquitous insulation materials. It's commonly used in two different types of insulation: blanket (batts and rolls) and loose-fill.

Fiberglass loose-fill insulation is made from molten glass that is spun or blown into fibers. Most manufacturers use 20% to 30% recycled glass content. Loose-fill insulation must be applied using an insulation-blowing machine in either open-blow applications (such as attic spaces) or closed-cavity applications (such as those found inside walls or covered attic floors).

Fiberglass blown-in insulation has an R-value of approximately 2.2-2.7 per inch of material.

Cellulose Blown-in

Cellulose insulation is made from recycled paper products, primarily newsprint, and has a very high recycled material content, generally 82% to 85%. The paper is first reduced to small pieces and then fiberized, creating a product that packs tightly into building cavities, inhibits airflow.

Loose-fill or blown cellulose is frequently used to insulate unfinished attics. One worker feeds cellulose into a hopper and blower unit that supplies shredded cellulose through a long hose to the installed located in the attic space who distrubutes the material evenly throughout the space to the desired thickness.

Blown-in cellulose insulation has an R-value of approximately 3.2-3.8 per inch of material.


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