PHONE: 810-614-0072[email protected]
Menu
InsulationMachines.net
  • Home
  • Blowers
    • CM 700 Portable
    • CM 1500 Portable
    • CM 2400 Contractor’s Favorite
    • CM 3500 Commercial Series
    • CM 4500 Insulation Blower
    • Used Blowers
    • Build Your Own Insulation Machine
  • Vacuums
    • Cool Vac 11 HP
    • CoolVac 16 HP
    • Cool Vac 23 HP
    • CoolVac 37 HP
    • 37HP MOAV
    • CoolVac Electric
    • Vacuum Saver
    • Foam Attachment
  • Wall Spray
  • Used Machines
  • Blower Parts
  • Training
  • Resources
    • Insulation Machine Blog
    • Payment Options
    • Calculators
    • Glossary of Insulation Machine Terms
    • Marketing Info You Can Use
  • Insulation Equipment
Close Menu
November 25 2010

What Is R-Value?

Barry Pendley Materials

r-value Insulation is needed for a structure to maintain an ideal interior temperature. Properly insulating your home makes its interior a pleasant environment to live or work in; significantly reduces your heating and cooling bill and makes your home ecologically friendly because you help conserve environmental resources.

In a nutshell, insulation is any type of material or substance that resists the transfer of energy (heat and cold). There are different types of insulation available in the market today but not all have the same level of effectiveness. Insulation materials are rated in terms of their thermal resistance called R-value. The R-value indicates the insulation material’s resistance to heat flow.  The R-value of any thermal insulation depends on the type of material, its density and its thickness.

The R-value is measured per square meter the amount of temperature difference in Kelvin degrees needed to transfer a watt of energy.  To simplify, an R-value of 1 will transfer one watt of energy per square meter and an R-value of 2 will transfer ½ watt of energy for one degree of difference. The higher the R-value, the greater its insulating capacity. When using multiple layers on insulation, the R-value of each layer is added for the total R-value.

The R-value is not the only factor to consider in insulation. The efficiency of an insulated floor, wall or ceiling also depends on where the installation is set up. Note that when insulation is compressed, it will not have its full R-value. For example, if you stuff a wall cavity with too much insulation, it will lose its effectiveness.

Here is a short list of known R-value of common insulating materials in a 6” wall.

  • Cellulose R-21
  • Fiberglass R-21
  • Urethane spray foam R-21
  • Poly-urethane spray foam R-42
Insulating Existing Walls Importance of Home Insulation

Related Posts

Materials

Blown in Cellulose Insulation

Materials

Vapor Barrier / Retarder

Materials

Environmentally Friendly Insulating Products: Insulating for Health and Sustainability

Contact Info

Insulation Machines
805 S State Road
Davison, MI 48423
(810) 614-0072
[email protected]

Certified Master Distributor of Cool Machines Van Wert, OH

Cart

FREE Shipping on Insulation Equipment!*

Recent Posts

  • Eliminate Static Electricity from Insulation Blowing and Vacuum Hose
  • Should You Rent or Buy an Insulation Machine?
  • New Insulation Material to Replace Styrofoam?
  • Working through the Fluff: Insulation Machine Production Rates
  • Used CM3500 – 20″ airlock
Back To Top
InsulationMachines.net
  • Sitemap
  • Privacy Policy