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.
