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85mm Knauf DriTherm 32 Cavity Slab 2.73m2 Pack – Pack Of 45

£1,418.63 inc VAT

In stock

Knauf Dritherm 32 cavity slab measuring 85mm x 1200mm x 455mm (3.35in x 47.24in x 17.91in) for effective wall insulation

Water-repellent, non-combustible mineral wool that fits tightly between wall ties without retaining discs

Resistant to rot, odourless, and inhibits vermin, fungi, mould and bacterial growth

Lightweight and easy to cut, handle, and install on site for quick progress

No cavity barriers required; suitable for buildings up to 12m high and multi-storey up to 25m, including very severe exposure zones

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Typically 1–3 working days
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Description

The Knauf Dritherm 32 cavity slab is a robust glass mineral wool insulation designed specifically for external masonry cavity walls. Trade professionals and serious DIYers will appreciate its reliable thermal performance and ease of installation, making it a smart choice for building projects requiring durable, fire-safe insulation. Please note: cavity barriers are not required with this non-combustible full-fill insulation.

This cavity slab is ideal for thermally insulating external walls in residential and commercial buildings. Its tight fit between wall ties eliminates gaps that can reduce efficiency, while its non-combustible nature minimises fire risk, removing the need for cavity barriers. It suits buildings up to 12 metres in height and multi-storey projects up to 25 metres, even in very severe exposure zones. The product is also water-repellent and BBA certified, ensuring consistent performance in all weather conditions.

Local Delivery

Delivery Information

We deliver timber and building materials across our Core and Extended delivery areas.

Free Delivery on Orders Over £750

Available across all qualifying Core and Extended delivery areas.

Core Delivery

  • Minimum order of £100
  • £25 delivery on orders from £100 to £749.99
  • Free delivery on orders of £750 or more

Extended Delivery

  • Minimum order of £250
  • £25 delivery on orders from £250 to £749.99
  • Free delivery on orders of £750 or more
  • Selected postcode districts are covered

Areas We Cover

Our delivery network covers Hertfordshire, North London and selected surrounding areas. Check the full postcode list before placing your order.

Delivery eligibility is based on your postcode and order value. Additional restrictions may apply to certain products or locations.

Returning An Item

At Halcyon Timber, we want you to be completely satisfied with your purchase. If you need to return an item, we're here to help.

Returning Standard Items

You may return most unused, standard stock items within 30 days of receiving your order.

To be eligible for a return, products must:

  • Be unused and in their original condition.
  • Be returned in their original packaging where possible.
  • Be accompanied by proof of purchase, such as your order confirmation or invoice.

Non-Returnable Items

Unfortunately, we cannot accept returns for:

  • Bespoke or made-to-order products.
  • Cut-to-size timber or sheet materials.
  • Special order items sourced specifically for you.
  • Products that have been installed, altered or damaged after delivery.
  • Perishable or time-sensitive products where applicable.

Return Costs

If you are returning an item because you have changed your mind or no longer require it, you are responsible for the cost of returning the goods.

If the goods are faulty, damaged, or supplied in error, Halcyon Timber will arrange collection or reimburse reasonable return costs where appropriate.

Restocking Charge

For returns made because you have changed your mind or no longer require the goods, a 30% restocking charge will apply to all returned items. This charge covers the costs associated with inspecting, handling, repackaging and returning stock to inventory or our suppliers, and will be deducted from your refund.

This restocking charge does not apply where goods are faulty, damaged on arrival, or supplied incorrectly.

Your statutory rights are not affected.

Returning Your Goods

Please contact us before returning any items so we can provide the correct return instructions and, where necessary, authorise the return.

Returns Address

Halcyon Timber
2 Warrenwood Industrial Estate
Hertford
SG14 3NU

Refunds

Once your returned goods have been received and inspected, we will notify you of the outcome.

If your return is approved, your refund will be processed using the original payment method.

Refund Times

Most refunds are processed within 3–5 working days after the return has been approved. Depending on your bank or card provider, it may take a little longer for the funds to appear in your account.

Faulty or Incorrect Items

If you receive goods that are damaged, faulty or incorrect, please notify us as soon as possible and ideally within 48 hours of delivery, including photographs where appropriate.

Where goods are confirmed to be faulty or supplied incorrectly, we will offer one of the following in accordance with your legal rights:

  • A replacement.
  • A repair (where appropriate).
  • A full refund.
  • Delivery Charges

 

Where a full order is cancelled within your statutory cooling-off period under the Consumer Contracts Regulations, any standard delivery charges paid will also be refunded.

If only part of an order is returned, or goods are returned outside your statutory cancellation rights, the original delivery charge may not be refundable.

Your Consumer Rights

Nothing in this policy affects your statutory rights under the Consumer Rights Act 2015 or the Consumer Contracts Regulations 2013.

If you have any questions regarding returns or refunds, please contact our customer service team, who will be happy to assist.