Rockwool Ductslab 50mm Insulation 4.8m² - HVAC Ducting Slab

Rockwool Ductslab 50mm — 4.8m² Pack

Rockwool Ductslab 50mm is a semi-rigid stone wool insulation slab with a reinforced aluminium foil facing, designed for thermal and acoustic insulation of rectangular and square HVAC ductwork and water storage tanks. Suitable for service temperatures up to 230°C, it is widely specified for air conditioning, warm air and extractor ducts in plant rooms, boiler houses and external installations.

Key Benefits

• A1 non-combustible — Euroclass A1 fire rating to EN 13501-1. Will not contribute to fire spread
• High temperature rated — suitable for service temperatures up to 230°C (foil face limited to 80°C)
• Water repellent — foil facing provides approximately 1000 MNs/g water vapour resistance when taped
• Acoustic absorption — reduces noise from air movement and high-velocity fluid systems
• LUL approved — authorised for London Underground surface and sub-surface premises
• Zero ODP and GWP — relies on entrapped air for thermal properties, no ozone-depleting or global-warming gases

Technical Specifications

• Thickness: 50mm
• Pack coverage: 4.8m² (8 slabs, 1000x600mm)
• Material: Stone wool with reinforced aluminium foil facing
• Fire rating: Euroclass A1 non-combustible
• Maximum service temperature: 230°C
• Thermal conductivity: 0.033 W/mK at 10°C | 0.040 W/mK at 50°C | 0.050 W/mK at 100°C
• Water vapour resistance: ~1000 MNs/g (foil faced and taped)
• Nominal density: 45 kg/m³

Applications

• Rectangular and square HVAC ductwork in plant rooms and boiler houses
• External ductwork requiring weather-resistant insulation
• Cold water storage, feed and expansion tanks
• Air conditioning, warm air and extractor duct systems

Complete Your Installation

• 75mm Aluminium Foil Tape — Seal slab joints and maintain a continuous vapour barrier
• 100mm Aluminium Foil Tape — For wider joints on larger ductwork
• Rockwool DuctWrap — Flexible roll alternative for circular ductwork
• Rockwool Duct Slab Foiled 40mm — Thinner alternative for space-constrained installations