High Density Cellulose Insulation R Value

Polyisocyanurate polyurethane foam insulation r values.

High density cellulose insulation r value.

Has less of an advantage in tighter dwellings. The r value per inch decreases slightly as density is increased from 3 0 to 4 0 lbs ft3. Typical thermal conductivity values for cellulose insulation are between 40 and 50 mw mk. However it is seldom used in canada despite its reasonable cost and efficiency.

High density batts for a 2 by 6 inch 51 by 152 mm frame wall offer r 21 and high density batts for an 8 5 inch 216 mm spaces yield about an r 30 value. I think i mentioned this earlier. Typically a higher insulation r rating means better climate control and better energy efficiency for your home. Cellulose insulation is used as a filler material to fill various cavities and spaces but cellulose insulation boards and mats are also produced.

Cellulose insulation provides greater resistance to air leakage and for me this is a biggie. A medium density batt offers r 13 for the same space. 5 this is unbelievably impressive. This does not just happen with cellulose.

Me thods and verification of density high density cellulose. Has the greatest advantage in houses with leaky walls especially walls where one cavity is connected to the next plaster and lathe. It also can happen with fiberglass. And while the low density fiberglass insulation used in attics rates a much lower r 2 0 per inch there is typically very little space restriction in attics.

So you can simply pile fiberglass deeper to achieve the r value you need. Thanks to thanks to andrew cole for correcting our data on this product. The r value of wet spray and dense pack cellulose insulation depends slightly on its installed density and the exact type of cellulose used but commonly ranges between 3 6 and 3 8 per inch 1 as measured by the standard astm c518 test. When we blow them with insulation we dense pack them to around 3 5 lb ft 3 56 kg m 3 density the leakage drops to 0 04 to 0 2 cfm ft 2 at 0 3 in.

Aging effects comments. The thermal conductivity of cellulose insulation varies with temperature moisture content and mass density. When cellulose is densely blown 3 0lbs ft3 or 48kg m3 or greater it is an excellent wall cavity insulation that provides a good r value at a reasonable cost. R 38 batts for 12 inch 304 mm spaces are also available.

A higher insulation r value usually means a higher price point as well. High r values and reduces leakiness significantly. 0 2 to 1 0 l s m 2 at 75 p. Polyurethane spray closed cell foam insulation.