What building material is fire resistant?

This blog post will answer the question, “What building material is fire resistant” and cover topics like fire-resistant properties of building material and frequently asked questions related to the topic.

What building material is fire resistant?

Fire resistant building materials include glass windows, cement, gypsum, masonry, & brick.

Fire-resistant materials for building

Materials that are resistant to fire are listed below:

  • Stones 
  • Bricks
  • Steel
  • Cast iron and wrought iron
  • Aluminum
  • Concrete
  • Glass
  • Asbestos Cement
  • Mortar or Plaster
  • Gypsum
  • Terra-Cotta 
  • Stucco

I will now elaborate on the guidance given above.


In a hilly environment where stones are readily accessible, stones are employed. Various sorts of stones are employed in different regions depending on their qualities. Polished stones are utilized for table tops, wall cladding, & column cladding. 

Stones are also used to construct a compound wall, as well as pots in the backyard garden. Walls are made of granite, sandstone, & limestone. Roofs and flooring are made of slate stones.

Stone has a stronger ability to endure fire between 13000 and 15000 degrees Celsius, beyond which it begins to melt or crumble. The stone should be used sparingly in fire-resistant constructions since these fire-resistant materials cannot withstand fast cooling and fracture into fragments.

Granite crumbles to sand or fractures and disintegrates when exposed to extreme heat, resulting in a succession of explosions & disintegration. 

The use of limestone is not recommended since it crumbles and deteriorates (turns to quick lime) when exposed to fire. 

Compact sandstone is more fire-resistant than limestone since it can withstand mild fire without developing severe fissures. The temp at which these stones give way will determine the outcome.


Bricks are the most widely used and preferred building material on the planet. Bricks are used to build walls, lintels, arches, retaining walls, hollow walls, and wet roof courses, among other things. Bricks are also employed to give the construction an attractive aspect.

First-class bricks are basically fireproof since they can survive fire for an extended period of time. Because they are weak heat conductors, the bricks can tolerate temps of up to 13000°C without causing major damage. 

The best usage for fire bricks is in fire-resistant buildings. The melting point of fire bricks is about 28000 degrees Celsius. The degree of fire resistance of bricks is determined by elements such as brick size, brick composition, building process, and so on. 

Despite the fact that brick has structural limits for usage in buildings, brick masonry has been shown to be the most effective in protecting structures from fire dangers.


Steel is utilized to construct high-rise and residential structures. Steel is utilized in the construction of beams, columns, lintel purlins, roofs, ceilings, and walls, among other things. 

It’s also employed as cooling and heating equipment, as well as interior ducting, in buildings. Interior fixtures such as rails, stairs, and storage are also made of steel.

Steel has a poor fire-resistance rating despite being a non-combustible fire-resistant material. As the temp rises, the material softens, reducing its resistance to the effects of tension or compression. 

Its yield strength is only one-third of what it is at normal temps at about 6000C. At 14000 degrees Celsius, steel melts. When steel buildings come into touch with water used to extinguish a fire, they tend to flex, twist, or deform, jeopardizing the whole structure’s integrity.

In reality, it has been seen that exposed steel beams droop and steel columns buckle, both of which result in the structure collapsing. As a result, all structural steel elements must be protected with some kind of fire insulation material in order for a building to be fire-resistant. 

This may be accomplished by entirely encasing the steel components in materials such as bricks, burned clay bricks, terra-cotta, cement or breeze concrete, and so on.

Cast iron and wrought iron

Exterior wrought iron stair railings, gates, & fences are employed as ornamental elements. Sanitary fittings, such as manholes, water mains, and sewage pipes, are made of cast iron. Metal columns & column bases are also made from it.

When exposed to fire, wrought iron behaves virtually identically to steel, with the exception that it has less flexibility and cover strength in tension and compression than steel. 

Cast-iron is seldom utilized in building as a fire-resistant material since it contracts and splits into bits or fragments when exposed to abrupt cooling. They melt at temperatures ranging from 11000 to 15000 degrees Celsius. 

Cast iron should be covered with bricks, concrete, or other fire-resistant materials when used in fire-resistant buildings.


Window frames, roofing, & curtain walling are all made of aluminum, as are cast door handles, window catches, and stairwell catches.

Because of its low weight and anti-corrosion qualities, aluminum is utilized for reinforcement in multi-story constructions in several advanced nations. Aluminum has a melting point of about 6600 degrees Celsius.

However, as a fire-resistant material, it performs poorly, and its usage (as an alloy) should be limited to buildings with minimal fire hazards or those that make hangers. It is an excellent heat conductor and has sufficient tensile strength.


It is an excellent fire-resistant material and a poor heat conductor. Although cement does not have a melting temperature, it does lose strength at a certain temp. Concrete retains its strength up to 2500 degrees Fahrenheit. 

Concrete’s heat resistance is determined by the kind of particles used and the density of the concrete. It is dependent on the location of steel in concrete in RCC and pre-stressed construction. For one hour, an RCC construction can withstand a fire of up to 10000C. 

According to research, typical concrete becomes dehydrated when subjected to heat, resulting in shrinkage fractures. (This occurs because aggregates in cement expand when heated, whilst cement shrinks and these two opposing activities cause both components to de-bond and create fissures.)


Glass is an excellent fire-resistant material due to its poor heat conductivity. It has a little volume change during contraction and relaxation and is hence regarded as a suitable fire-resistant material. 

Glass melts at temperatures ranging from 14000 to 16000 degrees Celsius. Sudden and abrupt temperature fluctuations, on the other hand, cause fractures or fissures. 

However, when glass is strengthened with steel wire netting, as in a wired glass, its heat resistance is much boosted, and its inclination to shatter with fast temperature fluctuations is greatly reduced. 

Because reinforced glass has a greater melting point, it is often utilized in construction to create fire-resistant doors, skylights, and windows. Glass Ceramic can withstand very high temperatures and is thus appropriate for use in fire-resistant doors.

Asbestos Cement

This fire-resistant material is made by mixing fibrous minerals with Portland cement and has a high fire-resistance rating. It has a melting point of about 8710 degrees Celsius.

Asbestos cement materials are often used to build fire-resistant walls and roofs, among other things. 

Because asbestos cement is a poor conductor of heat and an incombustible substance, it provides excellent resistance to cracking, expanding, and disintegration when exposed to fire.

Mortar or Plaster

It is a non-combustible fire-resistant substance that is used to protect building walls and ceilings from fire hazards.

Because lime plaster is more likely to be calcined, concrete plaster is preferable. By utilizing a thicker coating of plaster or strengthening the plaster with metal lathes, the plaster’s fire resistance to fire threats may be improved. 

Steel columns as well as other steel parts are also coated with gypsum plaster to improve their fire resistance. From a fire-resistance standpoint, the usage of fire-resistant materials such as concrete mortar with pozzolana is favored.

Vermiculite plaster is being utilized as a fire-resistant substance as well. Because of its low density and strong insulating characteristics, vermiculite is utilized in construction boards.


Gypsum is another popular fire-resistant material in the building industry. The melting point of gypsum is between 1000 and 1500 degrees Celsius. 

To avoid fire dangers and obtain strong fire-resistant ratings, many structural elements are linked beneath using gypsum sheets.

Gypsum boards popularly called “dry-walls,” are treated chemically to improve their firefighting capabilities. Builders utilize many layers of gypsum coating on gypsum boards to ensure that the underlying physical structure’s fire-resistant qualities are improved.


It is a clay product similar to brick, although it has superior fire resistance to bricks. Because it is more expensive, it is exclusively used in the building of fire-resistant flooring.


Stucco is a kind of plaster that has been used for both structural and aesthetic reasons for ages. Modern stucco is composed of Portland cement, sand, & lime, and it is an excellent and long-lasting fire-resistant construction material. 

Any structural material, like wood or masonry, may be covered. Over metal reinforcing mesh, usually comprises three coatings. A one-inch (2.54-centimeter) coating of stucco may readily provide a wall with a 1-hour fire rating. 

Roof eaves provide a fire threat, but they may be protected with a fire-resistant encasement. Stucco is often recommended as one of the finest materials for boxing in potentially dangerous eaves. Stucco may be found in a variety of textures and colors due to the versatility of finishing processes.

After examining all of the aforementioned construction materials, it can be concluded that effective fire-resistant material selection and construction process plays a critical role in reducing the risk of fire. 

The use of non-combustible materials to the greatest extent possible in a fire-resistant structure should be advocated. You may pick acceptable materials for your home building based on the availability of fire-resistant materials and your budget. 

However, you must choose the material carefully, comparing its performance to that of other loads such as earthquakes, cyclones, rain, wind, and so on. We hope that the information presented above will assist you in choosing appropriate materials for your home.

Frequently Asked Questions(FAQs), “What building material is fire resistant?”

Are bricks fire-resistant?

Individual bricks have high heat resistance, with the potential to tolerate temperatures up to 1200°C. The fact that bricks are often manufactured in a fire kiln is one of the most widely stated reasons for their high fire-resistance rating.

Is there anything that is genuinely fireproof?

Technically, no material is completely fireproof since it is susceptible to heat damage. Those tough molten lava granite surfaces are bonded with a man-made glue that cracks quickly at temps as low as 350 ℉.

How can I construct a fire-resistant wall?

Exterior walls made of fire-resistant materials like stucco, brick, or cement are the most fire-resistant.

Walls covered with less fire-resistant substances, like vinyl or wooden siding, should have fire-resistant wallboard installed on the outside surface, with the siding affixed directly to the wallboard.

Is it possible to find a substance that does not burn in a fire?

Any material that is placed in a fire will burn and turn to ash. Asbestos, on the other hand, does not ignite in a fire. As a result, when the firemen enter the blazing home, they wear asbestos-based clothing.

Are concrete structures fire-resistant?

Cement is among the most heat & fire-resistant building materials available. Because of this fire resistance, dwellings with concrete walls have significant safety benefits.

These benefits provide another motivation for builders and customers to pick cement walls for their next project.

What was missing from this post which could have made it better?

Leave a Comment