Brief Description:Low-density dry-hung curtain wall rock wool board is lightweight A1 non-combustible insulation for stone, aluminium and glass curtain wall cavity filling. Low self-weight, low thermal conductivity, high water repellency and great sound absorption. It cuts structural load, removes thermal bridges and delivers stable long-term insulation and fire stopping for high-rise curtain walls.

Haochen Low-density Thermal Insulation Rock Wool Board for Dry-clad Curtain Wall is a dedicated fire-resistant thermal-insulation material tailor-made for cavity filling of stone curtain walls, aluminium panel curtain walls and glass curtain walls. Manufactured from premium basalt and other natural mineral raw materials through high-temperature melting, high-speed centrifugal fibre spinning and integrated curing and forming processes, it is an A1 non-combustible inorganic thermal-insulation substrate. Different from high-density load-bearing rock-wool boards for external walls, this product adopts an exclusive lightweight low-density formula, perfectly suited for non-heavy-load working conditions inside curtain-wall cavities. It integrates lightweight easy-installation, high-efficiency thermal insulation, reliable fire resistance, sound absorption and moisture-proof performance, serving as an ideal supporting material for energy-saving insulation and gap fire-stopping of modern high-rise building curtain walls.

The product features a regular density range of 70 kg/m³ to 100 kg/m³, an optimised weight specification for dry-clad curtain-wall systems. Compared with traditional high-density rock-wool boards, it greatly reduces self-weight, effectively lowering the overall load on curtain-wall keels, connecting brackets and the main building structure. It eliminates hidden risks such as curtain-wall loosening, deformation and ageing caused by long-term heavy load, and helps control total project cost. The board boasts fine, uniform fibres and excellent flexibility, generating little debris while cutting and remaining free from caking. It delivers outstanding dimensional stability, resisting shrinkage, warping and deformation under long-term alternating outdoor temperature and humidity changes. It closely fits special-shaped construction positions including curtain-wall cavities, beam-column corners and door-window joints, eliminating insulation blind spots and thermal-bridge effects to ensure an integrated and continuous curtain-wall insulation system.

The product delivers stable overall performance with excellent core indicators. Classified as an A1 non-combustible material, it produces no molten droplets or toxic fumes under fire. It effectively blocks horizontal and vertical fire and smoke spread in curtain walls, meeting engineering fire-safety requirements for inter-layer fire barriers and gap sealing of high-rise curtain walls. It provides superior thermal insulation with thermal conductivity ≤0.040 W/(m·K). It efficiently blocks outdoor heat ingress and reduces indoor heat loss, adapting to various building energy-saving conditions and cutting air-conditioning and heating consumption. Benefiting from a fine porous fibre structure, it achieves remarkable sound-absorbing performance to filter traffic noise, wind-rain noise and ambient noise, greatly improving indoor comfort for office and residential use.

The board combines high water repellency with high breathability, achieving an overall water repellency ≥98%. It blocks rainwater and external moisture from penetrating into the board, while allowing condensate moisture inside curtain-wall cavities to escape freely. It fundamentally solves common industry problems including internal mildew, metal keel corrosion and insulation-layer failure caused by dampness. With strong weather resistance, it withstands harsh outdoor conditions such as high temperature, severe cold and heavy rainfall. Anti-ageing and non-powdering, its performance remains stable throughout its service life, matching that of the building main structure. Two options are available: plain surface and single-sided aluminium-foil facing. The aluminium-foil-faced version further enhances the vapour barrier, radiant heat insulation and smoke-penetration resistance, ideal for demanding high-rise and super-high-rise curtain-wall projects.

Produced in standard specifications with a regular size of 1200×600 mm, the board matches common installation modules of curtain-wall keels. It supports convenient on-site cutting and tight splicing, with low construction waste and high working efficiency, adapting flexibly to various special-shaped construction joints. It is widely used for cavity back-lining insulation of stone dry-clad curtain walls, aluminium-panel metal curtain walls and glass hidden-frame and exposed-frame curtain walls. It is also applicable for inter-layer fire-stopping and external-wall energy-saving retrofits of office buildings, commercial complexes, high-end hotels and high-rise residences. With stable performance and good construction adaptability, it is a preferred standardised special-purpose building material for thermal insulation, fire protection and noise reduction in dry-clad curtain-wall projects.