Achieve a tight, gap-free fit in timber and metal framing with the Rockwool Flexi insulation slab, supplied in a 1200 x 600 x 100mm size. This dual-purpose thermal and acoustic stone mineral wool slab features a unique flexible edge along one side that allows the product to be tightly fitted between supporting framework with no need for cutting or waste.

Offering a thermal conductivity of 0.035 W/m.K, this semi-rigid slab delivers excellent heat retention alongside reliable sound absorption. CE marked and classified as Euroclass A1 non-combustible to BS EN 13501-1, it ensures high fire safety and structural protection.

Manufactured with zero Global Warming Potential (GWP) and zero Ozone Depletion Potential (ODP), this environmentally friendly slab helps reduce your building's carbon footprint. Each pack provides a total coverage of 5.76m2.

• 1200 x 600 x 100mm semi-rigid slab – delivers robust thermal and acoustic insulation (5.76m2 pack coverage)
• Unique flexible edge – springs into place between timber and metal frames without cutting or waste
• 0.035 W/m.K thermal conductivity – minimizes heat loss across roofs, walls, and floor structures
• Euroclass A1 non-combustible – certified to BS EN 13501-1 for maximum fire safety
• Zero GWP and ODP – sustainable stone mineral wool construction reduces carbon footprint
• Fits typical frame spacings – engineered to slot directly into standard supporting framework

Delivery & Returns

Delivery: This item is delivered to the kerbside or the nearest accessible road point at your property. The driver won't be able to bring it into your property, so please make sure you can move it from there.

Due to courier restrictions, we're unable to deliver this item to the following postcodes:
Scotland: AB10–16, AB21–25, AB30–39, AB41–45, AB51–56, IV1–28, IV30–32, IV36, IV40–56, IV63, KW1–17, PA1–20, PA21–38, PA41–49, PA60–78, PA80, PH1–26, PH30–44, PH49–50
Wales: LD1–8, LL21–49, LL51–78, SA1–20, SA31–48, SA61–73, SY15–25

Returns: As this is a bulky item, unwanted returns incur a £40 collection fee (replacing our standard £9 fee). There is no charge for items that are faulty, damaged or sent in error. To arrange a collection, please contact our Customer Services team.

This item will be delivered directly by our supplier. Lead times are shown on the product and trolley pages and are always advertised in working days (Monday to Friday).

• If your order contains items stocked by us and items that come direct from the supplier, your order will be automatically split and processed accordingly.
• We will pass the details you give us, including delivery details, your email address and your phone number, to the relevant supplier.
• Most of our suppliers can deliver to any UK address. Delivery to remote or offshore postcodes may take a little longer than the advertised lead time. If the supplier cannot deliver to your postcode or we believe your order may take longer, we will try to tell you beforehand.
• Items that come direct from a supplier will be delivered by the courier chosen by the supplier. Where possible, suppliers will update you with delivery information. This may be by email, phone call or text message.
• Items delivered direct from suppliers cannot be returned through a store. You would need to return these items direct to the supplier, unused and in their original packaging, at your expense. You can arrange for most items to be collected by contacting our Customer Services team. A fee of £9* will be taken off your refund. There is no charge for faulty items being collected. *For big and bulky items, additional charges may apply.
• Please note, you cannot return bespoke or made-to-measure items unless they are faulty.