Building rock wool

Rock wool for inter‑story spaces is a fibrous thermal insulation and fire‑resistant material manufactured primarily from inorganic raw materials such as natural basalt and blast furnace slag. It is produced through high‑temperature melting, centrifugal fiberization, and subsequent curing and shaping. This product is specifically designed to provide fire‑stop sealing for gaps between building curtain walls and floor slabs or partition walls, offering multiple functions—including thermal insulation, fire resistance, and sound absorption—making it a core component of inter‑story fire‑protection systems.

Product Category:

Rockwool Series

Hotline:

021-56016537

Sales Department Phone:

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Product Description

Product Features

Non-combustible Class A1 fire resistance, with a fire-resistance rating of 1 to over 2 hours.

Excellent hydrophobic and moisture‑resistant performance, with a water repellency rate of ≥99%.

Melting temperature > 1000°C, with low high-temperature linear shrinkage.

It is non-corrosive to metals and exhibits stable physicochemical properties.

Asbestos-free, CFC/HCFC/HFC-free, environmentally friendly and safe.

Application Scenarios

External wall external insulation system: This is the most common application. Rock wool boards are fixed to the exterior of a building’s walls, forming a comprehensive system that provides thermal insulation, fire protection, waterproofing, and aesthetic finishing. It is particularly well suited for public buildings with stringent fire‑safety requirements—such as office towers, hospitals, and shopping malls—as well as for high‑rise residential structures. In some countries, rock wool is used almost exclusively for exterior insulation on buildings taller than 22 meters.

Firebreak Strip: In the exterior wall insulation system, a strip made of rock wool is installed at regular intervals along the height of the wall. Its function is to effectively prevent flames from spreading through the insulation system and to contain the fire’s escalation in the event of a fire.

Roof and Floor Insulation: High‑density rock wool boards can serve as both the insulation layer and the load‑bearing layer for roofs, commonly used on steel‑framed or concrete flat‑roofed structures in industrial plants, airports, sports venues, and similar applications. They are also suitable for insulating floor slabs between stories, providing thermal insulation and soundproofing.

Product model	MB40	MB50	MB60	MB80	MB100	MB120	MB150
Standard density kg/m³	40	50	60	80	100	120	150
Thickness mm	50-150	40-15-	40-250	25-250	25-250	25-150	25-150
Normal length × width mm	1200*600

Product Performance		Density grade (kg/m³)					Unit	Standard
Product Performance		60K	80K	100K	120K	150K	Unit	Standard
Thermal conductivity	50℃	≤0.04	≤0.038	≤0.038	≤0.038	≤0.038	W/(m•K)	GB/T 10295 ASTM C518 ASTM C177
	100℃	≤0.046	≤0.045	≤0.043	≤0.043	≤0.043
	150℃	≤0.060	≤0.055	≤0.050	≤0.050	≤0.050
	200℃	≤0.077	≤0.065	≤0.058	≤0.060	≤0.060
	250℃	≤0.095	≤0.075	≤0.063	≤0.063	≤0.063
	300℃	≤0.12	≤0.090	≤0.080	≤0.072	≤0.072

Product Performance	Density grade (kg/m³)					Unit	Standard
Product Performance	60K	80K	100K	120K	150K	Unit	Standard
Maximum operating temperature	500	650	650	650	650	°C	ASTM C411
Maximum operating temperature	Veneer material: 80
Hot-Load Shrinkage Temperature	≥500	≥600	≥600	≥600	≥600	°C	GB/T 11835
Linear shrinkage rate	≤2	≤2	≤2	≤2	≤6	%	ASTM C356
Moisture absorption rate	≤0.5	≤0.5	≤0.5	≤0.5		%	GB/T 5480
Hydrophobicity rate	≥99	≥99	≥99	≥99	≥9	%	GB/T 10299
Chloride ion content*	≤2	≤2	≤2	≤2	≤1	PPM	ASTM C871
Combustion performance	Non-combustible, Class A1 Smoke density = 5 Flame spread = 0						GB 8624 ASTM E84
Environmental protection	Asbestos-free, and contains no CFCs, HCFCs, or HFCs.						ASTM C356
Corrosivity	Non-corrosive						ASTM C665