Fiber Cement Siding R Value

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.

Fiber cement siding r value.

R value see table 2. 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. Because vinyl siding is thinner than fiber cement siding it can better accommodate insulation beneath its surface.

Current sources of asbestos r values such as engineeringtoolbox provide very inconsistent data. 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. 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. Insulation has an r value of r 2 to r 3 5.

When vinyl siding is optionally insulated it can achieve r 2 values and even greater. R 11 r 15 2 x 4 framing 2 x 6 framing r. This beats fiber cement which has an r value of 5 at most. Fiber cement siding while not inexpensive is a high resale value siding choice that offers equally high aesthetic appeal.

We already discussed the thickness of each material. Fiber cement siding is one of the better options for siding your home. This is an increase of 13 of effective thermal resistance. 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.

Standard vinyl siding has an r value 6. Foam thicker than a half inch will yield even higher r values. Adding foam back vinyl siding leaves fiber cement in the dust as that has at minimum 1 8 r value. 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.

Find the best fiber cement siding brands you may want to choose. Hardiepanel siding cempanel siding. 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. But the same source puts asbestos cement k 2 07 and for loosely packed asbestos k 0 15 this is very inconsistent data.

Fiber cement and vinyl r values.