75mm Knauf DriTherm Cavity Wall Insulation Slab 37 (4.37m2/Pack)

URN: 3002128
£18.18ex. VAT £4.16 per m2
£18.18ex. VAT
£4.16 per m2
Coverage required
m
m
Based on your total area of m2 (inc. 10% wastage) - of these are required (actual coverage of m2)

We recommend purchasing at least 10% extra product to allow for errors, damages or obstacles

Glass mineral wool slab for full-fill masonry cavity walls. Thermal conductivity 0.037 W/mK delivers reliable insulation performance. 75mm thickness suits older properties with non-standard cavity depths.

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Thu 25 Sep

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Product Overview

Glass mineral wool slab for full-fill masonry cavity walls. Thermal conductivity 0.037 W/mK delivers reliable insulation performance. 75mm thickness suits older properties with non-standard cavity depths.

URN: 3002128
£18.18ex. VAT

Delivery & Returns Information

How Our Delivery Works

We work with a nationwide network of trusted suppliers. As a result, items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you'll see multiple delivery charges at checkout. We always aim to group products from the same supplier to keep delivery costs as low as possible.

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If your delivery address falls within one of these postcode areas, we’ll be in touch before processing your order to confirm any additional delivery costs.
Please note: We do not currently offer delivery outside the UK mainland.

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Express Delivery

Express Delivery - Insulation and Plasterboard & Drylining
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Under £400 £50 ex. VAT
Over £400 ex. VAT £35 ex. VAT
Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products
ORDER VALUE DELIVERY CHARGE
Under £300 £50 ex. VAT
Over £300 ex. VAT £35 ex. VAT

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Returns

We offer a 30 day returns policy on any faulty products.

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Key Features

  • {{home}} Use in external masonry cavity walls
  • {{local_fire_department}} A1 non-combustible
  • {{thermostat}} 0.037 W/mK thermal conductivity
  • {{water_drop}} Water repellent
  • {{public}} Zero Global Warming Potential (GWP)
  • {{verified_user}} BBA certified

Technical Specification

Technical Specification
Product:DriTherm 37
Material Type:Glass Mineral
Thickness:75mm
Width:455mm
Length:1200mm
Pieces Per Pack:8
Sales Unit:Pack
Sales Unit Coverage:4.37m2
Brand:Knauf Insulation
Manufacturer's Reference:316654
Thermal Conductivity:0.037W/mK
Fire Rating:A1 Non-Combustible

Product Overview

Full-fill glass mineral wool insulation slab, measuring 75mm in thickness, for use in masonry cavity walls.

Produced with a high recycled glass content and ECOSE® Technology, it delivers strong thermal insulation while allowing vapour to pass through, supporting a healthier building fabric.

A thermal conductivity of 0.037 W/mK ensures effective energy efficiency, reducing heat loss and supporting compliance with modern Building Regulations.

With a Euroclass A1 non-combustible rating and full BBA certification for every UK exposure zone, it also delivers confidence in fire protection, durability, and performance over time.

At 75mm thick, the slab is designed for narrower cavity widths or refurbishment projects, providing a practical insulation solution where space is limited while still ensuring reliable thermal and acoustic performance.

Features & Benefits

  • Non-combustible Euroclass A1 fire rating: Ensures maximum fire safety in external walls.
  • Thermal conductivity 0.037 W/mK: Consistent thermal efficiency for mid-width cavities.
  • Water-repellent additive: Stops moisture transfer while staying vapour permeable.
  • 455mm width: Fits standard wall tie spacing for a close jointed finish.
  • Slabs knit together: Prevents air gaps and reduces thermal bridging.
  • Lightweight and cuttable: Simple handling and fitting on site.
  • ECOSE® Technology binder: No added formaldehyde and reduced embodied energy.
  • 75mm thickness: Suited to mid-width cavities in older properties and extension projects.

Applications

  • Mid-width cavity walls (75mm): Designed for older properties with non-standard cavity sizes.
  • Extensions and retrofits: Practical insulation where 100mm cavities are not available.
  • Masonry cavity external walls: Provides reliable long-term performance in housing.
  • Renovation projects: Improves insulation levels in older housing stock.


Installation Guidance

  • Cut to fit: Slabs can be trimmed cleanly with a sharp knife for an accurate fit.
  • Close-butt joints: Ensure slabs are tightly butted together with no gaps to maintain insulation performance.
  • Keep dry before fitting: Store indoors or under cover to protect the slabs until installation.


Compliance & Performance

  • Euroclass A1 to BS EN 13501-1: Highest level of non-combustibility.
  • BBA certified for all exposure zones: Approved for UK use in severe weather locations.



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