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Rockwool External Wall Dual Density Slab 1200 x 600 x 80mm | EWI Insulation Board

Rockwool External Wall Dual Density Slab 1200 x 600 x 80mm | EWI Insulation Board

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£18.00
£18.00 - £18.00
£18.00
£14.95
£14.95 - £14.95
£14.95

The Rockwool Dual Density Slab (1200 x 600 x 80mm) is a high-performance stone wool insulation board specifically engineered for use in external wall insulation (EWI) systems. Designed with two layers of density — a tougher outer surface and a softer inner layer — it offers outstanding thermal performance, acoustic insulation, and fire resistance for rendered facade systems.

✅ Dual density construction – rigid outer layer resists impact and improves fixings
✅ Designed for EWI systems with thin coat or dash render finishes
✅ Excellent thermal conductivity: 0.036 W/mK
✅ Euroclass A1 non-combustible fire rating
✅ Water repellent and vapour permeable – allows buildings to breathe
✅ Size: 1200mm x 600mm x 80mm (0.72m² per slab)

Rockwool slabs are easy to handle, cut, and install with standard fixings and are compatible with a wide range of basecoats, mesh, and render systems including silicone and acrylic finishes.

✔️ Ideal for new builds or retrofit EWI projects
✔️ Reduces energy loss and improves U-values
✔️ UK-wide delivery available in full or mixed pallet quantities
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Marc Scott
April, 2025
Very handy having such a well stocked yard so close to my home, the staff are all very knowledgable and always keen to help and prices are good. ⭐️⭐️⭐️⭐️⭐️ operation 👌. - scotbeds
Ryan McGowan
March, 2025
sales girl Leighsa was really helpful with fast delivery
D
March, 2025
Outstanding customer care. I placed a small order (60£ timber) from Fife and paid with Apple Pay. Unfortunately the site defaulted to their normal own delivery service which is for an unlimited volume so good value for larger orders, but would have been too expensive for a small order like mine. I hadn’t seen this until the order went through (entirely my fault). I had thought to cancel and the weekend office team were very kind and understanding about this. We agreed I would call them in the week to arrange this. But Alan and the Alter team phoned me back a day later and said they had researched courier costs and would be happy to do that instead - which saved a huge amount of hassle on a product that was out of stock in most places locally and made the whole order very reasonable. They also refunded me the difference. Way above and beyond for a small customer - can’t recommend them enough and will be using them for more timber needs in the future.
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