Fiber Cement Siding R Value

Fiber cement siding is one of the better options for siding your home.

Fiber cement siding r value.

Standard vinyl siding has an r value 6. But the same source puts asbestos cement k 2 07 and for loosely packed asbestos k 0 15 this is very inconsistent data. Current sources of asbestos r values such as engineeringtoolbox provide very inconsistent data. Foam thicker than a half inch will yield even higher r values.

Hardiepanel siding cempanel siding. 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. When vinyl siding is optionally insulated it can achieve r 2 values and even greater. R value see table 2.

Because vinyl siding is thinner than fiber cement siding it can better accommodate insulation beneath its surface. We already discussed the thickness of each material. Homeadvisor s siding comparison guide explores the differences pros and cons of fiber cement and vinyl including information on james hardie s hardie board hardiplank fiber cement. Fiber cement and vinyl r values.

Adding foam back vinyl siding leaves fiber cement in the dust as that has at minimum 1 8 r value. Find the best fiber cement siding brands you may want to choose. 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. Compare costs easy of installation colors painting options durability thickness r value length of life and more to decide which is the best siding for your home.

Fiber cement siding while not inexpensive is a high resale value siding choice that offers equally high aesthetic appeal. While fiber cement siding is energy efficient vinyl siding has the potential for this too. Fiber cement siding doesn t add much insulation to your wall system measuring in at a mere r 0 50. R 11 r 15 2 x 4 framing 2 x 6 framing r.

Fiber cement insulated vinyl siding and fiber cement can both provide a durable exterior solution for your project. That s a little less than you ll get from vinyl siding which. 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.

Thermal conductivity k 0 744 for cement board k 0 14 for asbestos millboard and k 1 66 for asbestos cement sheets.