The table below shows what levels of insulation are cost effective for different climates and locations in the home.
R 20 insulation.
R value is a measure of insulation s ability to resist heat traveling through it.
In the context of building and construction the r value is a measure of how well a two dimensional barrier such as a layer of insulation a window or a complete wall or ceiling resists the conductive flow of heat.
According to a footnote at the bottom of the table the first value is cavity insulation second is continuous insulation or insulated siding so 13 5 means r 13 cavity insulation plus r.
Regardless ashrae s new above deck roof insulation standard is a good place to start as it jumped 33 percent from r 15 to r 20 in five of six climatic regions.
Specifically the new product will meet 2012 iecc requirements that wood frame wall.
R value is the temperature difference per unit of heat flux needed to sustain one unit of heat flux between the warmer surface and colder surface of a barrier under steady state.
Ultimately selecting which product and value to use depends on many factors particularly thermal load.
To meet this requirement the r value of the cavity insulation must be at least 3 63 per inch.
Owens corning r 20 ecotouch insulation is specifically designed to meet the energy code requirements for 2x6 exterior wall constructions.
R 20 propink ecotouch fiberglass insulation is available in batts unfaced and faced with a kraft vapor retarder.
Insulation level are specified by r value.
R 20 ecotouch pink fiberglas insulation with purefiber technology is the preferred owens corning insulation by homeowners because of amazing sustainability.
For example if a builder chooses to comply with the r 20 option how is r 20 calculated.
Owens corning r 20 ecotouch insulation is specifically designed to meet the energy code requirements for 2x6 exterior wall constructions.
Owens corning pink insulation is soft to the touch and easy to install.
The federal stimulus plan s energy tax credits for insulation are based on the 2009 iecc which raises the wall insulation requirement for climate zones 5 and 6 from r 19 to r 20.
The r 20 fiberglass insulation roll is available faced with a kraft vapor retarder.
Kraft faced insulation has a vapor retarder that helps to control moisture.