Ceiling Batt Insulation R Value

For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3.

Ceiling batt insulation r value.

Existing 3 4 inches of insulation. Item 305816 model rxss31525. See the department of energy s doe ranges for recommended levels of insulation below. U factor is a measure of a component assembly in its conductive and radiate capacities.

Rockwool comfortbatt r 23 39 8 sq ft unfaced stone wool batt insulation 15 25 in w x 47 in l 469 owens corning ecotouch r 30 31 25 sq ft unfaced fiberglass roll insulation 15 in w x 25 ft l. Add insulation to attic. The higher the r value the better the insulation is at reducing heat flow. These batts meet the energy saving requirements of today s codes without requiring changes in construction.

Pink batts classic is our lower r value range of insulation designed to achieve minimum building code requirements. Let me explain when the general public hears an r 13 wall insulation they believe that in fact they have an r 13 insulation value in their exterior walls. High density sidewall batts are available in sizes to fit standard construction without loss of r value due to compression. This means for example that pink batts ultra r4 0 insulation is more effective than pink batts classic r1 8 insulation.

Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. Effective r values for batt insulation derived from ashrae document heat transmission coefficients for walls roofs ceilings and floors 1996 good fair poor measured batt thickness inches effective r value 2 5 per inch effective r value 1 8 per inch effective r value 0 7 per inch. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Owens corning r 19 ecotouch pink kraft faced fiberglass insulation batt 23 in.

Recommended insulation levels for retrofitting existing wood framed buildings. 10 bags model bf42 view the owens corning 2x6 wall floor insulation. Rockwool safe n sound r 59 7 sq ft unfaced stone wool batt insulation 15 25 in w x 47 in l. The truth is this studs have an r value of 3 5.