Knauf Insulation DriTherm Cavity Slab 32 (Ultimate) 150 x 455 x 1200mm (2.18m²) Pack of 4

The Knauf Insulation DriTherm Cavity Slab 32 (Ultimate) is a premium glass mineral wool insulation designed for full-fill masonry cavity walls that demand exceptional thermal performance and long-lasting protection. With an ultra-low thermal conductivity of 0.032 W/mK, it delivers maximum energy efficiency and comfort while maintaining superior fire and moisture resistance.

Each pack includes 4 slabs measuring 1200 x 455 x 150mm, covering 2.18m², making it perfect for new builds and high-performance wall insulation systems.

Features and Specifications

• Brand: Knauf Insulation
• Product Type: DriTherm Cavity Slab 32 (Ultimate)
• Dimensions: 1200mm (L) x 455mm (W) x 150mm (T)
• Pack Coverage: 2.18m² (4 slabs per pack)
• Material: Glass mineral wool
• Thermal Conductivity: 0.032 W/mK
• Fire Rating: Euroclass A1 (non-combustible)
• Water Repellent: Yes – prevents moisture penetration through the cavity
• Application: Full-fill masonry cavity wall insulation

Benefits

• Superior thermal insulation – delivers the lowest lambda value for exceptional energy efficiency.
• Excellent moisture resistance – keeps walls dry and insulation effective over time.
• Fire-safe material – Euroclass A1 rated for maximum building safety.
• Noise reduction – enhances acoustic comfort between and through walls.
• Environmentally responsible – made from sustainable, recyclable materials.
• Simple installation – lightweight, friction-fit design stays securely in place without fixings.

Ideal For

• Full-fill masonry cavity wall systems
• New residential and commercial builds
• Energy-efficient and sustainable construction projects

What’s the difference between DriTherm 32 and DriTherm 37?
DriTherm 32 offers better thermal performance (0.032 W/mK) than DriTherm 37 (0.037 W/mK), making it ideal for projects targeting superior insulation and energy efficiency.