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Knauf  |  SKU: 715829-35

Knauf Dritherm 32 Mineral Wool Cavity Wall Insulation - 100mm (114.8m²) - 35 Pack

£1,124.96 Ex VAT
£1,349.95 Inc VAT

Save on bulk quantities of insulation with our pallet of 35 packs of Knauf 100mm Dritherm 32 mineral wool cavity wall insulation.

Nationwide Delivery in 3-5 WORKING DAYS

  • £50 ex VAT Delivery
  • FREE DELIVERY OVER £500

Need a next-day or named day delivery? Call Us.


Make a saving on bulk quantities of our Knauf Dritherm 32 with this bundle of 35 packs - ideal for large projects. Dritherm 32 is a Glass Mineral Wool cavity slab insulation suitable for use in masonry walls. Install this cavity wall insulation during the construction of exterior masonry walls. Measuring 100mm, they are full fill insulation slabs, intended to friction-fit between wall-ties. 

  • 100mm thickness
  • Suitable for use in external cavity walls
  • Full fill cavity insulation slabs
  • Ideal for new builds and extensions
  • Euroclass A1 resistance to fire
  • Bundle of 20 x Packs (6 slabs per pack)

What is Cavity Wall Insulation?

Cavity Wall insulation is a type of insulation applied within the cavity walls (usually the exterior) of residential and commercial buildings. Many people are familiar with the form of cavity wall insulation that involves blowing small foam pellets into the cavity of existing houses, but modern houses are instead often built using Cavity Slab insulation batts - such as Knauf Dritherm 32 and 37. Instead of being applied retroactively, this is added during the process of constructing the wall - literally from the ground up. It is designed to “friction fit” between the cavity walls, in between the steel wall ties, and is an effective thermal insulation.

What Size is Knauf Dritherm 32 (100mm)?

Knauf 100mm Dritherm 32 comes in a pack of six “slabs” each of which measure 1200mm in length x 455mm width - designed to fit standard vertical wall tie spacings allowing a closed joint with adjacent slabs. Our Dritherm 32 Insulation is a full-fill insulation measuring 100mm so is designed for 100mm cavities. 

Knauf Dritherm 32 Cavity Insulation

Knauf Dritherm is a full-fill insulation designed to fill the entire cavity in external cavity walls - to be applied during the process of constructing cavity walls. It is designed to friction fit - meaning it sits snug within the cavity between wall-ties, with no additional fixings required. 

Dritherm 32 cavity insulation is a glass mineral wool designed to be a lightweight, water-resistant and highly non-combustible, fire-resistant thermal insulation. This can often be more forgiving than rigid insulation as it’s fibrous and flexible nature allows it to knit together to prevent air gaps which can compromise effectiveness. It is bound with their unique ECOSE® technology to help it form a solid matt, without the added formaldehyde or phenol. This is visible in the brown colour, as opposed to the more yellowish hue common in other glass mineral wools. 

The number (Dritherm 32, 37, etc) refers to the thermal conductivity, with the lower number meaning the insulation is less conductive and therefore a more effective insulation.

How to Use Knauf Dritherm Cavity Wall Insulation

Knauf Dritherm is a cavity wall insulation, meaning it is applied within the cavity of masonry cavity walls during their construction. It is built up along with either sides of a cavity wall and added as the courses of masonry and corresponding wall-ties are added. It is cut into 1200mm x 455mm sheets designed specifically to fit between these ties. Ensure you select a thickness that corresponds to the space of the cavity. Designed as a full-fill insulation, this insulation is designed to have full contact with the wall, so special care must be taken to avoid thermal bridging. 

What Thickness of Mineral Wool Insulation?

When choosing a thickness of cavity slab mineral wool insulation, it is dictated by whether you are intending to add a full-fill insulation or a partial-fill insulation. Knauf Dritherm 32 is a full-fill insulation, meaning it is designed to fill the cavity wall with no air gap, so typically you should select a thickness of cavity insulation the same thickness as your cavity.

How to Calculate U Value

The U-value (thermal transmittance) of a building component such as a wall, roof, or window, measures its thermal conductivity or how easily heat can pass through it. The lower the U-value, the better the insulation. To calculate the U-value, you typically need to consider several factors, including the materials used, their thicknesses, and any air gaps. A general formula for calculating the U-value:

U = 1 over R

Where:

U = U Value

R = The total thermal resistance of the building component, including all layers of materials and air gaps.

Knauf Dritherm Certifications

  • BBA Certified
  • Complies to BS EN 13162
  • EUCEB Certified
  • Manufactured in accordance with ISO 50001 Energy Management Systems, ISO 14001 Environmental Management Systems, ISO 45001 Occupational Health and Safety Management Systems and ISO 9001 Quality Management Systems.
knauf-dritherm-insulation

Data Sheets & Guides:

Knauf Dritherm Cavity Slab Insulation Data Sheet

Knauf Dritherm Cavity Slab Insulation Installation Guide

  • Size
    1200mm x 455mm
  • Quantity Per Pack
    6
  • Coverage (m²)
    114.8
  • Thickness
    100mm
  • Length
    1200mm
  • Width
    455mm
  • Material
    Glass Mineral Wool
  • Estimated Lifespan
    Equivalent to lifetime of wall structure
  • Thermal Resistance
    3.10 m² K/W
  • Thermal Conductivity
    0.032 W/mK
  • Reaction to Fire
    Euroclass A1

Do You Ship to My Address?

We deliver to most mainland UK addresses. If you are in one of the areas listed below and are unable to checkout, please give us a call to put together a custom quote.

Northern Ireland (BT), Isle of Wight (PO30-37), Isle of Man (IM), Scottish Highlands and Orkney Isles (PA, ML, EH, KA, G, KY, PH, DD, AB, IV, KW), Outer Hebrides and the Shetland Isles (HS, ZE) will incur additional charges and may also experience delivery delays.

How Much Will My Delivery Cost?

You can work out the cost of delivery on your order before checkout by heading to our Delivery Info page.

How Long Will Delivery Take?

We aim to deliver your items in 3 - 5 Working Days unless otherwise specified (eg - Sheds and Paving Kits). After you have placed your order, we will process your order and book a delivery day - which will then be sent to you via Email.

If have a specific request, please do give our team a call on 01156976800 and we will do our best to help.

What If I Need to Return Something?

If for any reason you wish to return your purchase, we will offer a refund or an exchange as long as this is requested within 14 days of receiving your order.

A manufacturer’s restocking charge may also apply on certain products such as non-stock items, which may be up to 30% of the purchase price, and you will be notified of this amount when you request a refund or exchange.

For full information visit our Returns Policy.

dritherm-32-insulation
Knauf

Knauf Dritherm 32 Mineral Wool Cavity Wall Insulation - 100mm (114.8m²) - 35 Pack

£1,124.96 Ex VAT
£1,349.95 Inc VAT

Make a saving on bulk quantities of our Knauf Dritherm 32 with this bundle of 35 packs - ideal for large projects. Dritherm 32 is a Glass Mineral Wool cavity slab insulation suitable for use in masonry walls. Install this cavity wall insulation during the construction of exterior masonry walls. Measuring 100mm, they are full fill insulation slabs, intended to friction-fit between wall-ties. 

What is Cavity Wall Insulation?

Cavity Wall insulation is a type of insulation applied within the cavity walls (usually the exterior) of residential and commercial buildings. Many people are familiar with the form of cavity wall insulation that involves blowing small foam pellets into the cavity of existing houses, but modern houses are instead often built using Cavity Slab insulation batts - such as Knauf Dritherm 32 and 37. Instead of being applied retroactively, this is added during the process of constructing the wall - literally from the ground up. It is designed to “friction fit” between the cavity walls, in between the steel wall ties, and is an effective thermal insulation.

What Size is Knauf Dritherm 32 (100mm)?

Knauf 100mm Dritherm 32 comes in a pack of six “slabs” each of which measure 1200mm in length x 455mm width - designed to fit standard vertical wall tie spacings allowing a closed joint with adjacent slabs. Our Dritherm 32 Insulation is a full-fill insulation measuring 100mm so is designed for 100mm cavities. 

Knauf Dritherm 32 Cavity Insulation

Knauf Dritherm is a full-fill insulation designed to fill the entire cavity in external cavity walls - to be applied during the process of constructing cavity walls. It is designed to friction fit - meaning it sits snug within the cavity between wall-ties, with no additional fixings required. 

Dritherm 32 cavity insulation is a glass mineral wool designed to be a lightweight, water-resistant and highly non-combustible, fire-resistant thermal insulation. This can often be more forgiving than rigid insulation as it’s fibrous and flexible nature allows it to knit together to prevent air gaps which can compromise effectiveness. It is bound with their unique ECOSE® technology to help it form a solid matt, without the added formaldehyde or phenol. This is visible in the brown colour, as opposed to the more yellowish hue common in other glass mineral wools. 

The number (Dritherm 32, 37, etc) refers to the thermal conductivity, with the lower number meaning the insulation is less conductive and therefore a more effective insulation.

How to Use Knauf Dritherm Cavity Wall Insulation

Knauf Dritherm is a cavity wall insulation, meaning it is applied within the cavity of masonry cavity walls during their construction. It is built up along with either sides of a cavity wall and added as the courses of masonry and corresponding wall-ties are added. It is cut into 1200mm x 455mm sheets designed specifically to fit between these ties. Ensure you select a thickness that corresponds to the space of the cavity. Designed as a full-fill insulation, this insulation is designed to have full contact with the wall, so special care must be taken to avoid thermal bridging. 

What Thickness of Mineral Wool Insulation?

When choosing a thickness of cavity slab mineral wool insulation, it is dictated by whether you are intending to add a full-fill insulation or a partial-fill insulation. Knauf Dritherm 32 is a full-fill insulation, meaning it is designed to fill the cavity wall with no air gap, so typically you should select a thickness of cavity insulation the same thickness as your cavity.

How to Calculate U Value

The U-value (thermal transmittance) of a building component such as a wall, roof, or window, measures its thermal conductivity or how easily heat can pass through it. The lower the U-value, the better the insulation. To calculate the U-value, you typically need to consider several factors, including the materials used, their thicknesses, and any air gaps. A general formula for calculating the U-value:

U = 1 over R

Where:

U = U Value

R = The total thermal resistance of the building component, including all layers of materials and air gaps.

Knauf Dritherm Certifications

knauf-dritherm-insulation

Data Sheets & Guides:

Knauf Dritherm Cavity Slab Insulation Data Sheet

Knauf Dritherm Cavity Slab Insulation Installation Guide

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