Fiber Cement Board Siding R Value

Board must be fastened to the framing members with 11 4 inch long 32 mm type s gypsum board screws spaced 24 inches 610 mm on center.

Fiber cement board siding r value.

Hardiepanel siding cempanel siding. This is an increase of 13 of effective thermal resistance. For instance if you have a material with an r value of 12 attached to another material with an r value of 3 then both materials combined have an r value of 15. Insulation has an r value of r 2 to r 3 5.

That s a little less than you ll get from vinyl siding which. Foam thicker than a half inch will yield even higher r values. This siding material which can be made to resemble wood grain or even stucco has actually been around for 100 years. Esr 1844 noncombustibility see page 1 section 3 1 flame spread and smoke developed see page 1 section 3 1 1 hour fire walls see page 2 section 4 3 design wind loads see page 4 5 table 4 r values see page 3 table 2.

We ve been providing a better way to build for over 100 years. This very durable siding material is quickly finding its way onto more homes due to its good looks fire resistance and high resale value. Your nearest restaurant bank theater or grocery store just might be sided with nichiha fiber cement board. When tested in accordance with astm e96.

R 11 r 15 2 x 4 framing 2 x 6 framing r. Fiber cement siding doesn t add much insulation to your wall system measuring in at a mere r 0 50. As we said before the r value measures the thermal resistance of a material. Thermal resistance r values for the panels are as shown in table 2.

Adding inch of rigid foam insulation r 2 in this example will increase a 2x6 stud wall from an effective r 15 to an effective r 17. According to table 5 1 of the ashrae fundamentals handbook fiber cement has an r value of 15 better than brick and stone but lower than vinyl at r 60 wood at r 81 and insulated vinyl siding at r 2 0 3 5. James hardie is the world leader in fiber cement siding and backerboard. Founded in the mid 1950s this diversified japanese company has been quietly producing fiber cement siding products for years mainly for commercial properties.

R value see table 2. Fiber cement and vinyl r values. If you have never heard of nichiha fiber cement siding you are not alone. Fiber cement offers minimal energy savings at 15 r value but can be installed with fanfold or insulating sheathing products to improve the r value of the whole siding system.