Fiber Cement Siding R Value

Fiber cement and vinyl r values.

Fiber cement siding r value.

That s a little less than you ll get from vinyl siding which. R 11 r 15 2 x 4 framing 2 x 6 framing r. Hardiepanel siding cempanel siding. Thermal conductivity k 0 744 for cement board k 0 14 for asbestos millboard and k 1 66 for asbestos cement sheets.

Fiber cement insulated vinyl siding and fiber cement can both provide a durable exterior solution for your project. While fiber cement siding is energy efficient vinyl siding has the potential for this too. Find the best fiber cement siding brands you may want to choose. Because vinyl siding is thinner than fiber cement siding it can better accommodate insulation beneath its surface.

This is an increase of 13 of effective thermal resistance. Foam thicker than a half inch will yield even higher r values. R value see table 2. Fiber cement siding while not inexpensive is a high resale value siding choice that offers equally high aesthetic appeal.

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. Adding foam back vinyl siding leaves fiber cement in the dust as that has at minimum 1 8 r value. Current sources of asbestos r values such as engineeringtoolbox provide very inconsistent data. But the same source puts asbestos cement k 2 07 and for loosely packed asbestos k 0 15 this is very inconsistent data.

When vinyl siding is optionally insulated it can achieve r 2 values and even greater. 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. 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. Fiber cement siding is one of the better options for siding your home.

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. 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 siding doesn t add much insulation to your wall system measuring in at a mere r 0 50. We already discussed the thickness of each material.

This beats fiber cement which has an r value of 5 at most.