Fireproof Thermal Insulation Rock Wool Blanket

As a Class A non-combustible material, Fireproof Thermal Insulation Rock Wool Blanket offers excellent fire safety performance, efficient thermal insulation capabilities, and effective sound absorption and noise reduction properties. Widely used in building wall insulation, industrial equipment thermal insulation, and ship fireproofing, it is a reliable, cost-effective, and high-performance inorganic fiber insulation material.

Product Features

- Excellent Thermal Insulation Performance

With an extremely low thermal conductivity coefficient, it effectively blocks heat transfer and significantly reduces energy loss.

- Outstanding Fire Resistance

Made from non-combustible Class A fireproof materials, it effectively delays the spread of flames and enhances the fire safety level of buildings or equipment.

- Good Sound Absorption and Noise Reduction

The porous fiber structure effectively absorbs sound wave energy, making it widely applicable for sound insulation in building walls and mechanical equipment.

- Hydrophobic and Moisture-Resistant Properties

By adding hydrophobic agents, the product effectively repels water penetration, maintaining long-term insulation performance and stability.

- Chemical Stability and Corrosion Resistance

Stable against most chemicals and unlikely to corrode metal equipment, making it suitable for corrosive environments such as chemical industries.

- Structural Stability and Seismic Resistance

The fibers are slender and elastic, resistant to deformation and collapse under temperature changes and vibrations, ensuring a long service life.

- Easy Installation

Lightweight and flexible, it is easy to cut and tailor, allowing tight adhesion to irregular surfaces and improving installation efficiency.

Product Applications

- Construction Field

Roof Insulation: Used as a thermal insulation layer for sloped roofs, installed over purlins or within suspended ceilings.

Wall Insulation: Applied in external wall insulation systems, curtain wall insulation, and internal wall soundproofing and insulation.

Partition Walls and Floors: Filled in steel structure buildings and office partitions to provide thermal insulation, soundproofing, and fireproofing.

- Industrial Field

Pipeline Insulation: Widely used for thermal insulation and anti-condensation of heating pipelines and petrochemical pipelines.

Equipment Insulation: Used for thermal insulation of industrial equipment such as boilers, storage tanks, reaction vessels, and flues.

Shipbuilding: Applied for fireproofing, thermal insulation, and soundproofing of ship bulkheads and decks.

- Other Fields

Agriculture: Used as thermal insulation covers for greenhouses.

Transportation: Applied for fireproofing and soundproofing in high-speed rail, subway carriages, and other vehicles.

Technical Parameters

Rock Wool Blanket Installation Guide

This guide applies to the construction of rock wool blanket insulation systems in building walls, industrial equipment, and pipelines, aiming to ensure construction quality, enhance insulation performance, and guarantee operational safety.

01 Pre-Construction Preparation

Material Inspection

Rock Wool Blanket: Verify material certificates to ensure bulk density, thickness, dimensions, and fire rating meet design requirements. Check that packaging is intact and the product is dry, undamaged, and uncontaminated.

Ancillary Materials: Prepare compatible insulation pins, adhesive, base coat mortar, alkali-resistant fiberglass mesh, and metal corner beads, ensuring their performance is compatible with the rock wool blanket.

Substrate Treatment

Wall/Equipment Surface: Must be solid, flat, and free from loose material such as oil and release agents. Surface flatness deviation should comply with specifications (typically ≤4mm/2m).

Cleaning and Drying: Remove all dust thoroughly. Substrate moisture content should not be excessively high.

Special Area Treatment: Pre-treat areas like door/window openings, wall penetrations, and expansion joints for waterproofing and sealing.

Tools and Safety

Construction Tools: Tape measure, chalk line, utility knife, handsaw, electric mixer, trowel, impact drill, etc.

Safety Protection: Scaffolding or elevated work platforms must be inspected and approved. Workers must wear protective gloves, masks, safety goggles, and long-sleeved work clothes to avoid fiber irritation.

02 Construction Process Flow

(1) Layout & Adhesive Application

Mark horizontal and vertical reference lines on the substrate to ensure level installation.

If using the adhesive method, prepare and apply adhesive according to the design or product instructions. Common methods include:

Strip Method: Apply strips of adhesive approximately 50mm wide onto the back of the blanket using a notched trowel.

Peripheral and Dot Method: Apply a continuous band of adhesive around the perimeter and place additional dots uniformly in the middle.

The adhesive coverage area should be ≥ 40% of the blanket's surface area.

(2) Rock Wool Blanket Installation

Installation Sequence: Install from the bottom up, horizontally, starting from internal corners. Stagger vertical joints between rows, with a stagger length ≥ 1/3 of the blanket length. Interlock blankets at internal and external corners.

Cutting: Use a specialized knife to make precise cuts for edges, corners, and openings like door/window reveals, ensuring tight joints.

Fixing:

Adhesive Method (Building Facades): Firmly press the adhesive-coated blanket onto the substrate, squeezing it flat using a straightedge. Remove any excess adhesive.

Mechanical Anchoring: Perform mechanical anchoring after the adhesive has initially set (typically after 24 hours).

Drill holes through the blanket and into the substrate using a drill bit matching the anchor sleeve diameter.

Insert the insulation pin into the hole until the anchor disc is flush and tight against the blanket surface.

Anchor Quantity: No less than 6-8 anchors per square meter on walls. Increase appropriately in high-stress areas like the ground floor and corners.

Strapping Method (Industrial Pipes & Equipment): Wrap the blanket tightly around the equipment surface. Securely strap it circumferentially at specified intervals using galvanized or stainless steel bands. Stagger joints between layers in multi-layer installations.

(3) Joint Treatment

All joints between rock wool blankets must be tight, with gap widths not exceeding 2mm.

Fill gaps wider than 2mm tightly with strips of the same rock wool material or foam insulation material.

(4) Base Coat Layer Application (Building Facade Systems)

Apply the first layer of base coat mortar over the installed blankets, approximately 2-3mm thick.

Immediately embed the alkali-resistant fiberglass mesh:

Press it flat from the center outwards, ensuring full embedding in the mortar without wrinkles or exposure.

Overlap standard mesh by ≥100mm; reinforced mesh can be butt-joined.

Once the first coat is dry enough to not be sticky, apply the second layer of base coat mortar, approximately 1-2mm thick, just covering the mesh but leaving its outline faintly visible.

Install additional reinforcing mesh at stress concentration areas like openings and corners.

03 Key Considerations

Moisture & Water Protection: Rock wool blankets must be protected from rain and moisture reliably during transport, storage, and construction. Do not apply during rain or if the substrate is wet.

Safe Work Practices:

Use safety harnesses for work at height. Keep tools in a tool belt.

Open flames are strictly prohibited during construction. Have firefighting equipment available.

Health Protection: Clean up debris generated during construction promptly. Shower and change clothes after work to minimize fiber contact with the skin.

Quality Self-Inspection: Continuously check flatness with a 2-meter straightedge and vertical alignment with a plumb bob during installation to ensure quality.

04 Common Issues & Solutions

Issue 1: Gaps at joints, leading to thermal bridging.

Solution: Ensure strict staggered joints and fill any gaps tightly with compatible material.

Issue 2: Cracking in the base coat layer.

Solution: Ensure proper mortar thickness and adequate curing. Install mesh flat without voids.

Issue 3: Loose insulation anchors.

Solution: Ensure drilling into a solid substrate and use anchors of sufficient length.

Summary: Standardized construction is crucial for the rock wool insulation system to achieve optimal performance. Always adhere to the principles of "Qualified Materials, Level Substrate, Secure Adhesion, Tight Staggered Joints, Effective Anchoring, and Proper Protection." For specific projects, always refer to the design drawings and relevant codes as the primary authority.

FAQ

Q1: What is the main difference between rock wool blankets and fiberglass wool?

A1: Rock wool blankets offer superior temperature resistance, with a long-term service temperature of up to 650°C, and higher mechanical strength. This makes them suitable for high-temperature applications and scenarios requiring some load-bearing capacity. Fiberglass wool, with its finer and longer fibers, holds a slight advantage in sound absorption at mid-to-low frequencies. However, its moisture resistance is generally inferior to rock wool, necessitating the use of a vapor barrier in humid environments.

Q2: Is rock wool blanket prone to settling or deformation during long-term use?

A2: No. Our production process utilizes vertical fiber alignment and pendulum layering technology, resulting in a three-dimensional fiber distribution that ensures exceptional structural stability. Tests confirm a volume compression rate of less than 3% over 20 years, significantly exceeding the Chinese National Standard requirement of ≤10%, guaranteeing consistent long-term thermal insulation performance without degradation.

Q3: How should rock wool blankets be selected and installed for humid environments?

A3: It is recommended to select waterproof rock wool blankets with a hydrophobicity rate ≥98%, as they offer excellent resistance to water penetration. For consistently high-humidity environments, a vapor barrier should also be installed on the exterior side of the insulation layer to comprehensively enhance the system's durability and thermal efficiency.

Q4: Can the fibers from rock wool irritate the skin?

A4: Our product features a special surface treatment that effectively minimizes fiber dispersal. During installation, wearing standard long-sleeved work clothes and gloves is sufficient for normal handling. If fibers accidentally contact the skin, simply rinse with flowing water; no special treatment is required.

Q5: What is the fire performance rating of rock wool blankets, and where are they applicable for fire protection?

A5: Rock wool blankets, made from natural basalt, are classified as A1 non-combustible materials. In case of fire, they do not contribute to flame spread or produce toxic smoke, meeting the highest levels of building fire safety requirements. They are widely used for fire protection in critical areas such as firewalls, fire compartments, stairwell refuge areas, and pipe shafts, effectively enhancing the overall fire safety rating of a building.

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