Cement Board Siding Fire Rating

Unlike wood it is fire resistant.

Cement board siding fire rating.

Two hour fire rated construction chase walls steel framed acoustical performance construction detail description test number stc test number 9 1 2 usg durock brand cement board and 1 4 ceramic tile two rows 2 x 4 wood studs 16 o c. James hardie uses what it calls the hardiezone system. Fire ratings the hardiebacker board is made with a quarter inch thickness so that it can serve as fireplace facing. Fiber cement siding maintenance.

Hz5 climate zones 1 5. Hardietrim boards hardiesoffit pre cut panels artisan by james hardie hardiewrap weather barrier hardiebacker cement board. However using fiber cement board like hardieboard is acceptable in locations including the mantel and fireplace surround. Fiber cement siding maintenance.

Yes hardiebacker 1 4 cement board is deemed noncombustible when tested to astm e 136 and can be used in conjunction with other noncombustible materials around a fireplace. On 2 x 8 common plate 3 1 2 thermafiber safb both cavities joints taped. The exact fire rating of durock is dependent on the other materials used during construction but a panel 1 4 or 1 2 inch thick typically provides an additional hour of fire protection. It can be used as part of a hour long fire wall which is a wall that can resist a fire for up to an hour.

Here are the main installation considerations with respect to the choice of materials. It offers the look of authentic wood shiplap siding even with lookalike textured wood grain. Icc es ner 405 fire resistance rated wall assemblies ner report ner 405 click the link above and go to section 3 5 of ner 405. Fiber cement siding stormed onto the scene a few decades ago and revolutionized the house siding industry because it possesses the best of many worlds.

An alternative to vinyl siding fiber cement a mixture of cement sand and wood fibers manages to achieve very high fire resistance without sacrificing convenience and durability. The predominance of wood in the mix makes smartside siding more susceptible to fire though it does have a 1 hour fire rating. This means that coupled with other fire resistant building materials including insulation and framing fiber cement siding will withstand fire and in some cases even increase the assembly s overall fire resistance. Are your products 1 hour fire rated.

This does not mean that clearances to combustible building materials can.