Fiber Cement Siding R Value

That means you ll need to use a superior grade of insulation inside of your walls attic and crawl space to ensure that your home is up to code in this regard.

Fiber cement siding r value.

Half inch thick rigid foam insulation has an r value of r 2 to r 3 5. 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. Thermal conductivity k 0 15. If you choose fiber cement siding for your project then the r value of the product is only 0 5.

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. 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 is rated as r 0 61 but the. While fiber cement siding is energy efficient vinyl siding has the potential for this too.

Adding foam back vinyl siding leaves fiber cement in the dust as that has at minimum 1 8 r value. R value see table 2. When vinyl siding is optionally insulated it can achieve r 2 values and even greater. Because vinyl siding is thinner than fiber cement siding it can better accommodate insulation beneath its surface.

This beats fiber cement which has an r value of 5 at most. Foam thicker than a half inch will yield even higher r values. Asbestos loose packed fibers powder. This means as a stand alone product fiber cement isn t going to add much insulation to your home.

Asbestos cement shingle siding. Asbestos cement board r value. Underlayment material even a foam board doesn t offer much extra and would be applicable to both materials. This is an increase of 13 of effective thermal resistance.

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. As we said before the r value measures the thermal resistance of a material. Standard vinyl siding has an r value 6.