Rock Wool Insulation Suppliers, Saudi Arabia

Rock Wool Insulation (mineral wool or stone wool) is a fibrous insulation material manufactured from volcanic basalt rock, offering excellent thermal performance, fire resistance, and acoustic absorption. It is the preferred insulation material for fire-rated applications in GCC construction, including fire-stop systems, fire-rated walls, and high-temperature industrial insulation. Rock wool achieves the highest fire classification (A1 non-combustible) and withstands temperatures exceeding 1000 degrees Celsius.

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Rock wool insulation is produced by melting basalt rock at approximately 1500 degrees Celsius and spinning the molten material into fine fibres bonded with thermosetting resin. Products include flexible blankets, rigid and semi-rigid slabs, pipe sections, loose-fill granulate, and high-density boards for flat roof insulation. Thermal conductivity ranges from 0.033 to 0.045 W/mK, with operating temperatures up to 750 degrees Celsius for standard products and 1000+ degrees Celsius for unfaced high-temperature grades.

In the UAE and Saudi Arabia, rock wool is specified for fire-rated wall and ceiling assemblies (providing fire resistance from 60 to 240 minutes), flat roof insulation under waterproof membranes (high-density boards with excellent compressive strength), HVAC duct and pipe insulation (with aluminium foil or reinforced aluminium foil facing), acoustic panels and sound barriers, fire-stop systems at service penetrations through fire walls, and industrial process insulation at elevated temperatures.

Major rock wool manufacturers supplying the GCC include Rockwool (the original and largest producer), Paroc, Knauf Insulation (rock mineral wool range), and Isover. Rockwool operates production facilities in the UAE region. Procurement managers should specify rock wool density and thickness per the thermal or fire engineer's design, verify A1 non-combustible fire classification (essential for GCC fire-rated applications where glass wool may not be accepted), and ensure correct specification of the facing material. For flat roof applications, compressive strength (minimum 40 to 60 kPa at 10 percent deformation) must be specified to support foot traffic and mechanical equipment loads.

Frequently Asked Questions — Rock Wool Insulation

What is the advantage of rock wool over glass wool for fire-rated applications?

Rock wool melts at approximately 1000 degrees Celsius compared to about 600 degrees Celsius for glass wool, providing superior performance in fire-rated assemblies. Rock wool also maintains its structural integrity at higher temperatures, which is why it is specified in fire-stop systems, fire-rated wall assemblies, and industrial high-temperature insulation. For standard thermal insulation without fire rating requirements, glass wool may be an equivalent and more economical alternative.

What compressive strength should I specify for rock wool roof insulation?

For flat roof applications where maintenance foot traffic is expected, specify a minimum compressive strength of 40 kPa at 10 percent deformation. For roofs with mechanical equipment or heavier traffic, 60 kPa or higher is appropriate. Two-layer systems with a high-density top board over a lower-density base board can optimise thermal performance while providing adequate surface strength.

Is rock wool insulation affected by moisture?

Rock wool is hydrophobic (water-repellent) by virtue of its manufacturing process, and water drains through the fibre structure rather than being absorbed. However, sustained immersion will reduce thermal performance. In GCC construction, proper vapour barriers and weatherproof outer layers protect rock wool from moisture. Wet rock wool should be allowed to dry before covering, as trapped moisture in any insulation reduces effectiveness.