Fire Resistant Siding and Roofing Materials

All buildings can catch fire. But buildings that are built of fire-resistant materials give the residents enough time to escape in the event of a fire. Fire-resistant materials need not necessarily be noncombustible, but they possess properties that slow down the spreading of fire.

Here is a quick overview of fire-resistant siding and roofing materials:

Fiberglass-Based Asphalt Shingles

Asphalt shingles are the least expensive residential roofing materials. They are also fire-resistant. Fiberglass-based shingles offer excellent fire resistance, especially when they are installed with underlayments that comply with fire codes.

Metal Tile

Metal tiles aren't combustible and when they have fire-resistant barrier materials under them, they offer excellent protection from fire. These tiles are lightweight and don't require much maintenance.

Clay Tile

Clay tiles are not only durable but also noncombustible.

Recycled-Rubber Tile

Roofing materials made of recycled rubber are light weight. They are also quite cheap. Better still, they meet tough fire resistance requirements.

Slate

Nothing can beat slate in terms of elegance, beauty and versatility. These tiles are almost indestructible and noncombustible. Slate tiles are heavy, so you need to ensure that your roof is strong enough to support them.

Fiber Cement

Fiber cement shingles have excellent fire resistance. They are made from a mixture of sand, wood and Portland cement. They can withstand high heat for up to 4 hours. If you are planning to use fiber-cement sidings, you need to add gypsum-board underlayments. This will offer maximum protection against fire.

However, you need to remember that you can't get protection from fire by simply cladding your house in fire-resistant roofing and siding materials. If there are cracks or holes in the walls, the embers will find their way inside.  Other inflammable surfaces also increase the risk of fire. So don't forget to enclose soffits and eaves with a fire-retardant trim.

Stone Veneer

Stone veneer is another noncombustible natural material that you can use to wrap your roof. By using fire-rated mortar and repairing cracks periodically, you can prevent the stones from popping off under the heat of a fire.

Exterior Insulation Finish Systems (EIFS)

An EIFS finish does not look much different from stucco. It is created by applying an acrylic cement finish over a fiberglass lath. By adding a foam insulation layer to the back of the cement, you can prevent cracking. Note that some EIFS products don't have fire ratings because the noncombustible materials in them will readily fall off when they are confronted with heat. However, EIFS will not make the underlying wall system vulnerable to fire.

Treated Wood

Natural wood is highly inflammable. However, several roofing and siding companies now sell shingles and clapboards mixed with fire-retardant chemicals. If you use them, you should retreat the wood periodically to retain its fire resistant property because chemicals can leach out over time.

Masonry

Fire retardant stucco walls and bricks offer decent protection from fire provided that they are of the required thickness. While these materials are slightly expensive, they will last decades if they are properly installed and maintained. A layer of gypsum is more than enough to slow down the conduction of heat from your siding to your framing.

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