Fiber Cement Board Siding R Value

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.

Fiber cement board siding r value.

Insulation has an r value of r 2 to r 3 5. When tested in accordance with astm e96. Fiber cement siding doesn t add much insulation to your wall system measuring in at a mere r 0 50. R value see table 2.

R 11 r 15 2 x 4 framing 2 x 6 framing r. If you have never heard of nichiha fiber cement siding you are not alone. 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. You may have seen fiber cement board or siding and didn t even recognize it.

As we said before the r value measures the thermal resistance of a material. Hardiepanel siding cempanel siding. That s a little less than you ll get from vinyl siding which. This siding material which can be made to resemble wood grain or even stucco has actually been around for 100 years.

Founded in the mid 1950s this diversified japanese company has been quietly producing fiber cement siding products for years mainly for commercial properties. This is an increase of 13 of effective thermal resistance. Fiber cement insulated vinyl siding and fiber cement can both provide a durable exterior solution for your project. 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.

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. We ve been providing a better way to build for over 100 years. Your nearest restaurant bank theater or grocery store just might be sided with nichiha fiber cement board. 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.

07 46 46 fiber cement siding report holder. Thermal resistance r values for the panels are as shown in table 2. James hardie is the world leader in fiber cement siding and backerboard. Foam thicker than a half inch will yield even higher r values.