Rockwool Rocklap Foil Backed Pipe Insulation Lagging – 1m

Rockwool Rocklap Foil Backed Pipe Insulation Lagging — 1m

Rockwool Rocklap is the UK's leading mineral wool pipe insulation, trusted by M&E contractors, heating engineers and specifiers across commercial, industrial and district heating applications. Each 1m section features a factory-applied aluminium foil facing with a self-adhesive lap for fast, clean installation — no tools or additional adhesive required.

As an A1 non-combustible product, Rocklap is the specified choice wherever fire resistance is critical, and its ability to perform continuously at temperatures up to 250°C makes it suitable for steam, high-temperature heating and process pipework that elastomeric foam products cannot handle.

Key Benefits

• A1 non-combustible — Euroclass A1 fire rating, will not contribute to fire spread. Essential for commercial and industrial installations
• High temperature rated — suitable for continuous operating temperatures from 0°C to +250°C, covering steam, HVAC and hot water services
• Foil facing with self-adhesive lap — aluminium foil jacket reflects radiant heat, provides a clean professional finish and seals without additional tape or adhesive
• Wide size range — pipe outside diameters from 15mm to 219mm, wall thicknesses from 20mm to 70mm
• Dimensionally stable — mineral wool will not shrink, settle or degrade at high operating temperatures
• Moisture resistant — maintains thermal performance in damp plant room conditions

Technical Specifications

• Material: Stone wool (mineral wool) with aluminium foil facing and self-adhesive overlap
• Length: 1m per section
• Pipe outside diameter: 15, 22, 27, 28, 35, 42, 48, 54, 60, 67, 76, 89, 108, 114, 127, 140, 169, 219mm
• Insulation thickness: 20, 25, 30, 40, 50, 60, 70mm
• Operating temperature: 0°C to +250°C
• Fire classification: Euroclass A1 non-combustible
• Facing: Aluminium foil with self-adhesive overlap

Wall Thickness Selection Guide

• 20mm wall — Light commercial heating and hot water pipework, frost protection
• 25mm wall — Standard commercial specification, meets Part L and CIBSE Guide C for most heating applications
• 30mm wall — Enhanced performance for high-temperature heating mains and steam pipework
• 40mm wall — Industrial process pipework and high-temperature steam systems
• 50mm wall — Maximum performance for demanding industrial and process applications
• 60–70mm wall — Heavy industrial, power station and refinery pipework

Shop by Pipe Size

15mm | 22mm | 28mm | 35mm | 42mm | 48mm | 54mm | 60mm | 67mm | 76mm | 89mm | 114mm

Applications

• Commercial and district heating mains and primary circuits
• Steam pipework and high-temperature process pipework
• HVAC and building services pipework
• Plant room and boiler house pipework
• Industrial process and chilled water pipework
• Fire-rated pipework penetrations and compartmentation

Complete Your Installation

• Aluminium Foil Tape — Seal butt joints and ensure a continuous vapour barrier across the full pipe run
• Rockwool Rocklap Pipe Supports — Foil Faced — Matching foil-faced mineral wool pipe supports for a consistent, professional finish at pipe fixings
• Rubber & Standard Pipe Clamps — Secure your insulated pipework with the correct pipe clamps for commercial and industrial installations

For technical advice on wall thickness selection or compliance with Part L, CIBSE Guide C or project specifications, call our team on 0161 775 1190 (Mon–Fri 8am–4pm).

Technical Downloads

• 📄 Rockwool Rocklap Pipe Sections — Technical Data Sheet (PDF)
• 📄 Rockwool Rocklap Pipe Sections — Installation Guide (PDF)
• 📄 Rockwool Rocklap — Declaration of Performance RWUK-CE-0107-05 (PDF)
• 📄 Rockwool Rocklap — Declaration of Performance RWUK-CE-0262-01 (PDF)

Frequently Asked Questions — Rockwool Rocklap Pipe Insulation

What is the maximum temperature Rockwool Rocklap can handle?

Rocklap is rated for continuous operating temperatures from 0°C to +250°C, making it suitable for steam pipework, high-temperature heating mains and process pipework where elastomeric foam insulation is not appropriate.

Is Rockwool Rocklap suitable for steam pipes?

Yes. Rocklap's mineral wool core withstands continuous temperatures up to 250°C, making it one of the few pipe insulation products suitable for low and medium pressure steam systems. It is widely specified for steam pipework in commercial and industrial plant rooms.

What does A1 non-combustible mean?

Euroclass A1 is the highest fire classification under EN 13501. A1-rated products will not contribute to fire spread or produce smoke or burning droplets. Rocklap's A1 rating makes it the required specification for many commercial, public sector and industrial projects where fire safety regulations apply.

How do I choose the right wall thickness?

Wall thickness selection depends on the pipe service temperature, pipe size and the applicable energy efficiency standard. As a general guide: 25mm wall suits most commercial heating and hot water applications and meets Part L and CIBSE Guide C requirements; 30–40mm wall is recommended for high-temperature heating mains and steam; 50mm and above is for demanding industrial and process applications. Call our team on 0161 775 1190 for specification advice.

Does Rocklap need additional tape or adhesive?

No. Each section features a factory-applied self-adhesive lap that seals the foil facing without additional tape or adhesive. For butt joints between sections, we recommend aluminium foil tape to maintain a continuous vapour barrier.

What pipe sizes does Rockwool Rocklap come in?

Rocklap is available for pipe outside diameters from 15mm to 219mm, with wall thicknesses from 20mm to 70mm. Select your pipe outside diameter and required wall thickness from the variant options above.

Is Rockwool Rocklap compliant with Part L building regulations?

Yes. Rocklap is widely used to meet the pipe insulation requirements of Part L of the Building Regulations (Conservation of Fuel and Power). The appropriate wall thickness will depend on pipe size and service temperature — refer to CIBSE Guide C or contact our team for compliance guidance.

Can Rocklap be used outdoors?

Rocklap is primarily designed for internal plant room and building services applications. For external or exposed installations, additional weatherproof cladding (such as aluminium cladding or UV-resistant jacketing) is recommended to protect the foil facing from weathering.