Glass wool is widely used in building insulation, duct systems, and industrial equipment insulation projects. While lightweight and with a stable fiber structure, it requires meticulous attention to construction techniques and details. Improper installation can easily affect insulation performance, sound absorption, and lifespan.

I. Key Points for Pre-Construction Preparation

Before construction, confirm that the specifications, density, and thickness of the glass wool match the design requirements to avoid insufficient insulation or sound absorption due to improper selection. Also, check the material's appearance to ensure it is not damp, not compressed, and that the packaging is intact.

The construction environment should be kept dry, especially when working outdoors or in damp areas. Take precautions against rain and moisture in advance. Once glass wool absorbs moisture, its thermal conductivity and structural stability will significantly decrease.

II. Cutting and Laying Precautions

When cutting glass wool, use a sharp knife to ensure a smooth cut. The cut should be slightly larger than the actual installation dimensions to ensure no noticeable gaps after laying. Avoid squeezing the material during cutting to prevent damage to the fiber structure.

When laying glass wool, ensure the fiber layers are evenly distributed, avoiding hollow areas, wrinkles, or localized compression. Compression reduces the proportion of air layers within the material, directly affecting insulation and sound absorption.

III. Joint and Node Treatment Requirements

Joint treatment is crucial in glass wool construction. Adjacent boards or felts should be tightly joined, without noticeable gaps. For ductwork and piping systems, corners, flanges, and support locations require special attention; if necessary, use trimming reinforcement to prevent cold or sound bridges.

In multi-layered structures, joints should be staggered to reduce direct paths for heat and sound.

IV. Key Points for Moisture-Proofing and Protective Layer Installation

Glass wool itself has a porous fiber structure; its moisture-proof performance depends on the outer protective layer. During construction, ensure the aluminum foil, fiberglass cloth, or other moisture-proof layers are intact and continuous, overlap widths meet specifications, and joints are tightly sealed.

Damage to the protective layer is a common cause of glass wool insulation failure. During construction, avoid stepping on, puncturing, or pulling the protective layer.

V. Fixing Methods and Structural Stability

The fixing method for glass wool should be selected according to the application location. For wall and roof systems, anchors or adhesive bonding are typically used; for duct and equipment insulation, metal clips, cable ties, or special fasteners are often used.

The spacing between fixing points should meet design requirements, ensuring a firm fit while avoiding excessive compression that could degrade material performance.

VI. Safety and Protective Measures

Fiber dust may be generated during glass wool construction. Construction personnel should wear protective gloves, masks, and goggles to avoid skin and respiratory irritation. After construction, residual fibers should be cleaned up promptly to maintain a clean environment.

VII. Key Inspection Points After Construction

After construction, the following should be checked:

Are there any damp areas?

Are the joints tight?

Is the protective layer continuous and intact?

Is the material visibly compressed or damaged?

Only when all the above requirements are met can a glass wool system stably maintain its thermal insulation and soundproofing performance over the long term.

In summary, the key to glass wool installation lies not in the material itself, but in meticulous attention to detail. Proper cutting and laying, rigorous moisture protection, and reasonable fixing methods are the core factors ensuring the performance and durability of the glass wool insulation system.