Fiber Cement Siding R Value

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

Fiber cement siding r value. Fiber cement siding is one of the better options for siding your home. Hardiepanel siding cempanel siding. Fiber cement siding doesn t add much insulation to your wall system measuring in at a mere r 0 50. That s a little less than you ll get from vinyl siding which.

Find the best fiber cement siding brands you may want to choose. Fiber cement siding while not inexpensive is a high resale value siding choice that offers equally high aesthetic appeal. Standard vinyl siding has an r value 6. 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.

Foam thicker than a half inch will yield even higher r values. Fiber cement insulated vinyl siding and fiber cement can both provide a durable exterior solution for your project. 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 already discussed the thickness of each material.

But the same source puts asbestos cement k 2 07 and for loosely packed asbestos k 0 15 this is very inconsistent data. 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. When vinyl siding is optionally insulated it can achieve r 2 values and even greater. Adding foam back vinyl siding leaves fiber cement in the dust as that has at minimum 1 8 r value.

Fiber cement and vinyl r values. Insulation has an r value of r 2 to r 3 5. This is an increase of 13 of effective thermal resistance. 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.

While fiber cement siding is energy efficient vinyl siding has the potential for this too. Because vinyl siding is thinner than fiber cement siding it can better accommodate insulation beneath its surface. 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. This beats fiber cement which has an r value of 5 at most.

R 11 r 15 2 x 4 framing 2 x 6 framing r.