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Rockwool  |  SKU: 133090

Rockwool Hardrock Multi-Fix (DD) Flat Roof Insulation - 1200 x 1000 x 150mm (1.2m²)

£78.25 Ex VAT
£93.90 Inc VAT

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.


Rockwool Hardrock Multi-Fix (DD) is designed for flat roof insulation applications. Made from stone mineral wool slab with a mineral-coated fleece facing, it is non-combustible - ideal for roofing applications where fire resistance is a primary concern. With a thermal conductivity value of 0.039 W/mK and excellent acoustic reduction properties, Rockwool Hardrock Multi-Fix is an effective thermal and acoustic  flat roof insulation. 

  • 150mm thickness
  • Suitable for use in flat roofing
  • Non-combustible board compatible with a range of waterproofing systems
  • Install over Rockwool Hardrock Underlay Slab
  • Euroclass A2-s1, d0 resistance to fire
  • Thermal Conductivity Rating of 0.039 W/mK

What is Rockwool Hardrock Multi-Fix (DD)?

Rockwool Hardrock is a non-combustible, dense mineral wool insulation board designed for use in flat roofing, and compatible with a wide range of waterproofing systems including Bitumen, liquid membranes and even green roofing systems. It has a thermal conductivity value of 0.039 W/mK and provides effective sound insulation to reduce drumming effect from rain, making Rockwool Hardrock Multi-Fix (DD) an ideal thermal and acoustic insulation with excellent fire resistance for flat roofing.

What Size is Rockwool Hardrock Multi-Fix (DD)?

Rockwool Hardrock Multi-Fix measures 1000mm wide by 1200mm long (1.2m²) and is 150mm thick. 

How to Install Rockwool Hardrock Multi-Fix (DD)

The method of installation may vary depending on your specific project and materials, however, Hardrock Multi-Fix DD Insulation is recommended specifically for use in flat roof applications. It is typically installed onto the vapour control layer in a “staggered” formation with the fleeced side facing upwards. For more detailed installation information, consult the installation guide. 

Rockwool Hardrock Multi-Fix (DD) Fire Rating

Hardrock Multi-Fix DD Insulation has a fire rating of Euroclass A2-s1, d0.

Data Sheets & Guides:

Rockwool Hardrock Multi Fix (DD) Insulation Data Sheet

Rockwool Hardrock Multi Fix (DD) Insulation Installation Guide

  • Size
    150mm
  • Quantity Per Pack
    1 Board
  • Coverage (m²)
    1.2
  • Thickness
    150mm
  • Length
    1200mm
  • Width
    1000mm
  • Material
    Dense Mineral Wool Board
  • Thermal Conductivity
    0.039 W/mK
  • Water Resistance
    5.9 MNs/gm
  • Reaction to Fire
    Euroclass A2-s1, d0

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.

rockwool-multifix-dd
Rockwool

Rockwool Hardrock Multi-Fix (DD) Flat Roof Insulation - 1200 x 1000 x 150mm (1.2m²)

£78.25 Ex VAT
£93.90 Inc VAT

Rockwool Hardrock Multi-Fix (DD) is designed for flat roof insulation applications. Made from stone mineral wool slab with a mineral-coated fleece facing, it is non-combustible - ideal for roofing applications where fire resistance is a primary concern. With a thermal conductivity value of 0.039 W/mK and excellent acoustic reduction properties, Rockwool Hardrock Multi-Fix is an effective thermal and acoustic  flat roof insulation. 

What is Rockwool Hardrock Multi-Fix (DD)?

Rockwool Hardrock is a non-combustible, dense mineral wool insulation board designed for use in flat roofing, and compatible with a wide range of waterproofing systems including Bitumen, liquid membranes and even green roofing systems. It has a thermal conductivity value of 0.039 W/mK and provides effective sound insulation to reduce drumming effect from rain, making Rockwool Hardrock Multi-Fix (DD) an ideal thermal and acoustic insulation with excellent fire resistance for flat roofing.

What Size is Rockwool Hardrock Multi-Fix (DD)?

Rockwool Hardrock Multi-Fix measures 1000mm wide by 1200mm long (1.2m²) and is 150mm thick. 

How to Install Rockwool Hardrock Multi-Fix (DD)

The method of installation may vary depending on your specific project and materials, however, Hardrock Multi-Fix DD Insulation is recommended specifically for use in flat roof applications. It is typically installed onto the vapour control layer in a “staggered” formation with the fleeced side facing upwards. For more detailed installation information, consult the installation guide. 

Rockwool Hardrock Multi-Fix (DD) Fire Rating

Hardrock Multi-Fix DD Insulation has a fire rating of Euroclass A2-s1, d0.

Data Sheets & Guides:

Rockwool Hardrock Multi Fix (DD) Insulation Data Sheet

Rockwool Hardrock Multi Fix (DD) Insulation Installation Guide

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