ROCKWOOL RWA45 Slab

ROCKWOOL RWA45 is a robust insulation solution for a range of general building projects as well as specialist specifications such as commercial, leisure, industrial and more. The insulation provides excellent acoustic, thermal and fire performance.

ROCKWOOL RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. RWA45 is made up of high-quality resin-bonded slabs in a variety of thicknesses and densities. Specialist facings are available to order to meet the specifications of unique projects.

The ROCKWOOL slabs can be applied to an array of general building applications for acoustic and thermal insulation of partition walls, ceilings, floors and roofs. The multi-use solution is well-suited for easy application throughout construction.

RWA45 is rated Euroclass A1 non-combustible, providing the highest level of fire performance. Using RWA45 in ceilings, walls and floors can help to compartmentalise rooms, reducing fire spread and damage.

RWA45 insulation slabs achieve Lambda 0.035 W/mK and are available in seven standard thicknesses from 25-100mm, with a density of 45 kg/m3.

Important details about this product:

• Length: 1200mm
• Width: 600mm
• Thickness: 25mm, 50mm, 75mm, 100mm
• Reaction to Fire: Euroclass A1 non-combustible
• Thermal Conductivity: 0.035 W/mK
• Water Repellent: Yes, water vapour resistance – negligible

Key Features & Benefits:

• ROCKWOOL RWA45 Insulation Slabs offer excellent thermal, acoustic and fire performance.
• The slabs are easy to handle and install.
• Rated Euroclass A1 non-combustible, RWA45 offers the highest level of fire resistance.
• RWA45 is a durable insulation solution which will maintain high performance over the lifetime of the building.
• The water repellent qualities of the insulation prevent moisture build up, damp and rot.

Rockwool RWA45 Pack Sizes & Coverage:

• 25mm –  16 sheets – 11.52sq.m
• 50mm – 9 sheets – 6.48sq.m
• 75mm – 6 sheets – 4.32sq.m
• 100mm – 4 sheets – 2.88sq.m

Do you offer Free Delivery?

Yes! On most insulation orders over £400 excluding VAT, we can offer free delivery*. 

Delivery depends on stock availability and location. If stock is not available at your local branch and must be delivered from another branch, this may affect lead time or delivery charges. In this case, one of our advisors will contact you to confirm any changes. 

You can also send your enquiry via Contact Page or WhatsApp, and we will calculate the costs for you. We always aim to have your order travel the shortest distance possible to ensure free or the most economical delivery option. 

Orders below £400 excluding VAT are usually subject to a delivery fee of £50 excluding VAT. 

*Orders into central London (inside the North Circular and South Circular) will be charged on orders up to £1,000 + VAT due to increased shipping costs and congestion charges. Orders must also be above £350 + VAT to be processed.

Where do you deliver to?

We can deliver to 95% of the UK, using our branches across England, Wales, and Scotland. To check if you are in our delivery area, see the map or your postcode. 

London postcodes: BR, CR, DA, E, EC, EN, HA, IG, KT, N, NW, RM, SE, SM, SW, TW, UB, W, WC, WD. 

Other postcodes: AL, B, BA*, BB, BD, BH*, BN, BS, CA, CB, CM, CO, CT, CV, CW, DA, DD*, DE, DG*, DH, DL, DN, DT*, DY, EH*, EX*, FK*, FY, G, GL*, GU, HD, HG, HP, HU, HX, IP, KA*, KY*, L, LA, LE, LL, LN, LS, LU, M, ME, MK, ML, NE, NG, NN, NR, OL, OX*, PA*, PE*, PH*, PL*, PO*, RG, RH, RM, S, SG, SK, SL, SN*, SO, SP*, SR, SS, ST, SY, TA*, TD*, TF, TN, TQ*, TS, WA, WF, WN, WR, WS, WV, YO. 

Limited areas (PO – Mainland only; BA, BH, DD, DG, DT, EX,  EH, FK, GL, KA, KY, OX, PA, PE, PH, PL, SN, SP, TA, TD, TQ & PL) may have restricted delivery coverage depending on distance from the branch and order size.

Where will you deliver my order to?

All deliveries are kerbside only. It is your responsibility to move items from the kerb onto your property. The courier decides where the order is left, so please ensure there is ample space to offload.

Delivery access and site restrictions

These items are typically delivered on large 18T or 26T rigid lorries, approximately 10–12 meters long, 4 meters high, 2.6 meters wide, carrying 12–14 pallets.

Please inform us of any access restrictions or site issues in advance; failure to do so may result in extra delivery charges.

When do you dispatch orders?

If your order is placed before 12:00 PM, we aim to process and dispatch it on our lorries the next working day. Occasionally, lorries may be full, or stock may need to be brought in from another branch, which can extend delivery up to 10 working days. Some areas are subject to set delivery days due to distance from the local branch.

Please ensure to leave a mobile number so that we can contact you with your delivery date once we have received confirmation from the local branch. This also allows ourselves or the delivery driver to contact you if there are any issues with your delivery.

Why do we need your contact number?

It is essential to provide a mobile number so we or the delivery driver can contact you if there are any issues. For orders of this nature, we may contact you after ordering online to discuss delivery options, site restrictions, or offloading requirements.

How much will my delivery cost?

For orders over £400 excluding VAT, we can offer free delivery*. 

Delivery costs vary depending on the product and delivery location. When you add items to your basket and proceed to checkout, the delivery price will be displayed. We keep delivery costs as low as possible and only pass on the rates charged by our delivery partners.

How long will my delivery take?

Each product page shows the usual lead time below the “Add to Basket” button. These times are a guide only, and we aim to deliver your items as quickly as possible.