Fiber Cement Board Siding R Value

When tested in accordance with astm e96.

Fiber cement board siding r value.

Founded in the mid 1950s this diversified japanese company has been quietly producing fiber cement siding products for years mainly for commercial properties. Fiber cement and vinyl r values. Thermal resistance r values for the panels are as shown in 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. Insulation has an r value of r 2 to r 3 5. Fiber cement insulated vinyl siding and fiber cement can both provide a durable exterior solution for your project. 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.

That s a little less than you ll get from vinyl siding which. 07 46 46 fiber cement siding report holder. Your nearest restaurant bank theater or grocery store just might be sided with nichiha fiber cement board. Hardiepanel siding cempanel siding.

This siding material which can be made to resemble wood grain or even stucco has actually been around for 100 years. Fiber cement siding doesn t add much insulation to your wall system measuring in at a mere r 0 50. 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. 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.

This is an increase of 13 of effective thermal resistance. R value see table 2. 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. 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.

As we said before the r value measures the thermal resistance of a material. Foam thicker than a half inch will yield even higher r values. James hardie is the world leader in fiber cement siding and backerboard. 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.