Rock Wool Board Precautions

Dec 12, 2025|

1. Rain protection is essential; construction should not be carried out in rainy weather.

 

2. For cold insulation, a moisture-proof layer must be added. In extremely low temperatures, use resin-free rock wool for insulation, and the moisture-proof layer must also be fireproof.

 

3. When the temperature exceeds a certain level, such as 200℃, a suitable outer protective layer must be added to prevent changes in the thickness and density of the rock wool board.

 

4. For large-diameter and flat-walled equipment using finished rock wool insulation, when temperatures exceed 200℃, always remember the rock wool board manufacturer's instructions: add insulation nails (approximately 400mm apart), and ensure the outer protective layer is tightly fitted.

 

5. For equipment requiring insulation, insulation nails, and pipes, appropriate coatings can be applied to facilitate corrosion prevention. Additionally, there should be no leaks. This will achieve better results. 6. Rock wool boards, when used for outdoor insulation, are susceptible to mechanical wear and should be covered with metal or plastic sheathing. Pay attention to the joints and seams, ensuring they are tightly sealed. Use adhesive sealing strips if necessary, and ensure the overlapping layers of the sheathing are at least 100mm.

 

7. When the object being insulated is placed at a 90-degree angle and has a certain height, the rock wool insulation layer must have positioning pins or support rings, with a spacing not exceeding 3 meters, to prevent the insulation material from sliding downwards during vibration.

 

8. To minimize heat loss, the joints between rock wool boards and felt must be tightly butted together. If there are multiple layers of insulation, the cross joints need to be interlaced to avoid thermal bridging. For cold insulation, cold bridging must be eliminated.

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