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Rock Wool Board for Pitched Roof Thermal Insulation
Brief Description:Pitched roof rock wool board uses premium basalt material with Class A1 non-combustible performance and great slope adaptability. Densities range from 80 kg/m³ to 180 kg/m³. It fits colour steel purlin roof systems and waterproof membrane overlay works with customisable sizes.
Basic Info
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Model
1200 × 600 mm. Other sizes can be custom‑made. -
Shipping Place
Hebei, China -
Updated
2026-09-27 -
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NewsProduct Details
| Standard Size | 1200×600mm (Custom-cut sizes available upon request) |
|---|---|
| Standard Thickness | 50mm, 60mm, 80mm, 100mm, 120mm, 150mm (Custom-cut thicknesses available upon request) |
| Fire Rating | Class A1 Non-combustible |
| Hydrophobic Rate | Board-core: Non-hydrophobic standard / Hydrophobic (≥98%), optional |
| Recommended Density | 80-180 kg/m³, custom densities on request. 80-100 kg/m³ mainly for noise reduction (not suitable for roof load-bearing); 120-130 kg/m³ for simple pitched roof; 140-180 kg/m³ recommended for high-load standing-seam metal roof. |
| Customisable aluminium‑foil facings | Optional facings include FSK series, FP series, FB series, new-type reinforced mesh aluminium-foil, aluminium-foil fiberglass cloth, W38 and VR series. |
| Application Method | Two typical installation solutions: 1. Simple pitched roof: Lay rock wool board directly, then fix colour-steel sheet on the top. 2. Standing-seam metal-roof assembly: Installed as thermal-insulation layer between the vapour-barrier layer and TPO waterproof membrane. |
| Compressive Strength | ≥30 kPa@140 kg/m³; ≥40 kPa@160-180 kg/m³ |
Pitched roof thermal insulation constitutes a vital component of energy-efficient building construction. Unlike flat and low-slope roofs, pitched roof structures feature inclined surfaces, imposing higher requirements on insulation boards in terms of surface conformity, compression resistance, load-bearing capacity and flexible fitting performance. Haochen professional rock wool boards for pitched roofs are manufactured via advanced basalt melting and fibre spinning technology. With customisable density and dimensional specifications, our rock wool insulation perfectly adapts to diverse pitched roof construction solutions, applicable to most thermal and acoustic insulation projects for sloped roofs.
1. Core Manufacturing Technology & Basic Performance
Our pitched roof rock wool boards are produced from high-quality basalt and dolomite raw materials. Under 1500 °C high-temperature melting and centrifugal spinning, raw materials are processed into ultra-fine inorganic fibres. The full integrated production process, including pendulum fibre laying, wrinkling pressing, thermal curing shaping and precision cutting, forms a stable three-dimensional interlaced fibre network structure for finished boards.
Balanced flexibility and structural stability enable the rock wool board to fit inclined roof surfaces seamlessly without gaps or deformation. It integrates three core performances: reliable thermal insulation, superior sound absorption and Class A1 non-combustible fire resistance, serving as a high-grade inorganic insulation material for all pitched roof building systems.
2. Application & Density Selection Guide for Different Construction Scenarios
Scenario 1: Batten & Purlin Frame + External Colour Steel Roof Panel (Conventional Pitched Roof Solution)
Construction Process: Install roof batten and purlin framework → Lay rock wool boards flat → Enclose with external colour steel roof panels
In this structural system, rock wool insulation is fully enclosed within the roof assembly, with no heavy load imposed by waterproof layers or covering materials. The board primarily undertakes thermal insulation, noise reduction and thermal bridge elimination functions with low load-bearing demand.
Recommended Density: 80 kg/m³ – 140 kg/m³ standard rock wool board
Advantages: Cost-effective with low and stable thermal conductivity. The lightweight structure allows effortless on-site cutting and flexible fitting along inclined roof slopes, significantly improving construction efficiency. Ideal for standard pitched roof insulation projects such as industrial factories, homestay buildings and light steel villas.
Scenario 2: Direct Waterproof Membrane Overlay (No Hard Top Cover, Medium to High Load Condition)
Construction Process: Lay rock wool boards on roof base → Apply waterproof membrane directly onto the board surface
Under this working condition, insulation boards bear continuous pressure from membrane installation, routine rooftop maintenance foot traffic and long-term rainwater extrusion. Conventional low-density rock wool is prone to compressive collapse and fibre loosening, which causes waterproof membrane bulging, cracking and eventual failure of the entire insulation system.
Mandatory Specification: 180 kg/m³ high-density rigid rock wool board
Advantages: The high-compression rigid structure effectively resists deformation and compression, providing stable structural support for waterproof membranes to prevent bulging and damage. Featuring outstanding moisture resistance and extrusion resistance, the board maintains complete fibre structure even under long-term rainwater infiltration. It guarantees long-term durability of both thermal insulation and waterproof systems, widely applied in high-standard projects including villa roofs, commercial building roofs and projects requiring long-term waterproof warranty.
3. Core Advantages of Haochen Pitched Roof Rock Wool Board
Superior Slope Adaptability: Optimised fibre flexibility enables precise fitting for all slope angles, minimising splicing gaps and preventing heat and air convection loss.
Class A1 Non-Combustible Performance: Made of pure inorganic basalt material, the board achieves zero flammability and no molten dripping during fire exposure, completely eliminating roof fire hazards.
Excellent Acoustic Insulation: Effectively attenuates rain impact noise and external ambient noise, greatly enhancing indoor quietness and comfort.
Moisture and Mildew Resistance: Optional hydrophobic modification delivers ultra-low water absorption, preventing dampness, mildew growth and thermal performance degradation of insulation layers on sloped roofs.
Customisable Specifications: Board thickness, length and width can be precisely customised according to roof slope and purlin spacing, reducing on-site secondary processing and construction material waste.
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