Rock Wool Boards Used To Construct Firewalls Reducing Potential Safety Hazards
Product Specifications
| Attribute |
Value |
| Density |
40 - 200 kg/m³ |
| Color |
yellowish-brown |
| Stock Size |
1200×600 (mm) |
| Thickness |
30mm-150mm |
| Electrical Insulation |
Good |
| Noise Reduction |
Good |
| Fireproofing |
Good |
| Hydrophobic Property |
Good |
| Temperature Resistance |
-268℃ ~ 650℃ |
| Surface Finish |
Rough |
Properties
In a building’s fire safety system, firewalls and fire compartments function like "fire barriers" and "isolation zones"—they can block the spread of fires and protect people and property. Rock wool boards are fiberboards made by melting rocks such as basalt and diabase at high temperatures. They are inherently "non-combustible, high-temperature resistant, low-smoke, and non-toxic," fully complying with national regulations on building fire protection. This makes them especially suitable for constructing firewalls and dividing fire compartments.
Rock wool boards offer those key advantages
First, they have strong fire resistance. Even when exposed to intense fires reaching 800–1200°C, they do not burn or melt and drip. A 5cm-thick board can withstand high temperatures for over 1.5 hours, while a 10cm-thick one can last more than 3 hours—meeting the fire resistance duration requirements of different types of buildings.
Second, they are safe and eco-friendly. At high temperatures, they only release small amounts of water vapor and carbon dioxide, with no formaldehyde, toxic gases, or significant smoke. This reduces the risk of poisoning during fires.
Third, they are durable and sturdy. They rarely deform or collapse, and have good water resistance. After special treatment, they barely absorb water—even when used in damp basements, they won’t get moldy or lose effectiveness, and can last as long as the building itself.
Fourth, they are multi-functional. Beyond fire protection, they also insulate heat and block sound. In winter, they reduce heat loss; in daily use, they muffle noise. There’s no need to install separate insulation or soundproofing materials, making them more convenient and cost-effective.
How are they specifically used?
For walls: In residential communities and hotels, partition walls between households or between public areas and rooms are typically built with a light steel frame, filled with 5–8cm-thick rock wool boards, and covered with a layer of fire-resistant gypsum board on the outside. Such walls can block fires for 2–3 hours while also insulating against noise and temperature differences from neighboring units. In places like chemical plants and warehouses—where flammable and explosive materials are common—firewalls are made more robust: a concrete base is used, with 5–10cm-thick high-density rock wool boards sandwiched inside and a layer of fire-resistant steel plates wrapped around the exterior. These can withstand fires for over 4 hours, preventing explosions and fires from spreading to other areas.
For floors and ceilings: In office buildings and shopping malls, 5–8cm-thick rock wool boards are laid under floor slabs between upper and lower floors. This stops fires from spreading downward and reduces heat transfer between floors. Inside ceilings, a "fire partition" (50cm wide) is installed every 10–15 meters, filled with 10cm-thick rock wool boards. This prevents fires—caused by short circuits in wires or issues with pipes inside the ceiling—from spreading widely.
For easily overlooked areas like pipe shafts and cable trenches: In high-rise residential buildings, each floor’s cable shaft is filled with 8–10cm-thick rock wool boards, and gaps are sealed with fireproof glue to stop flames from spreading upward along the pipes. For air conditioning and ventilation ducts, a fire damper is installed every 20–30 meters, and the ducts are wrapped (either inside or outside) with 5cm-thick rock wool boards—preventing flames from spreading through the ducts to other locations.
