D.I.Y. - R Value Chart

Check our products page to find the right R-value insulation for your home.

R-VALUE INFORMATION

U.S. DEPARTMENT OF ENERGY RECOMMENDATIONS FOR NEW HOMES

Insulation is specified by its thermal resistance or R-value. "R" means resistance to heat flow. The higher the R-value, the greater the insulating power.

The amount of insulation you need depends mainly on climate, type of heating (gas, oil, electricity) you use, and the area of the house you plan to insulate.

Zone	Add Insulation to Attic		Floor
	Uninsulated Attic	Existing 3–4 Inches of Insulation
1	R30 to R49	R25 to R30	R13
2	R30 to R60	R25 to R38	R13 to R19
3	R30 to R60	R25 to R38	R19 to R25
4	R38 to R60	R38	R25 to R30
5 to 8	R49 to R60	R38 to R49	R25 to R30
Wall Insulation: Whenever exterior siding is removed on an Uninsulated wood-frame wall: Drill holes in the sheathing and blow insulation into the empty wall cavity before installing the new siding, and Zones 3–4: Add R5 insulative wall sheathing beneath the new siding Zones 5–8: Add R5 to R6 insulative wall sheathing beneath the new siding. Insulated wood-frame wall: For Zones 4 to 8: Add R5 insulative sheathing before installing the new siding.

Please contact our office for the latest R-Value requirements.

225 Cedarcrest Dr.
Lexington, SC
(803) 791-0055