Ceiling Batt Insulation R Value

These batts meet the energy saving requirements of today s codes without requiring changes in construction.

Ceiling batt insulation r value.

Rockwool safe n sound r 59 7 sq ft unfaced stone wool batt insulation 15 25 in w x 47 in l. Recommended insulation levels for retrofitting existing wood framed buildings. High density sidewall batts are available in sizes to fit standard construction without loss of r value due to compression. R value actually stands for resistive value.

Pink batts classic is our lower r value range of insulation designed to achieve minimum building code requirements. Item 305816 model rxss31525. 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. See the department of energy s doe ranges for recommended levels of insulation below.

The higher the r value the better the insulation is at reducing heat flow. 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. 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. The truth is this studs have an r value of 3 5.

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. Add insulation to attic. High density cathedral ceiling batts allow an airspace between the insulation and roof deck for ventilation. Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value.

10 bags model bf42 view the owens corning 2x6 wall floor insulation. U factor is a measure of a component assembly in its conductive and radiate capacities. Owens corning r 19 ecotouch pink kraft faced fiberglass insulation batt 23 in. This means for example that pink batts ultra r4 0 insulation is more effective than pink batts classic r1 8 insulation.