Rockwool Flexi
Acoustic and thermal flexi edge building slabs.
Dual purpose acoustic and thermal mineral wool insulation with a patented Flexi® edge along one side.
Suitable for a wide range of applications, fitting all stud and joist centers with ease.
Will not slump, even if studs shrink.
Non-combustible – Euroclass A1.
Made from diabase rock, which is a renewable and plentiful natural resource.
Does not contain gases that have ozone depletion potential (ODP) or global warming potential (GWP).
Thicknesses and Availability:
This Rockwool Range includes the following readily available product thicknesses: 50mm, 60mm, 70mm, 90mm, 100mm, 140mm, and 180mm (some thicknesses may only be available in pallet quantities as they will need to be sourced from the manufacturer before being delivered to site).
The following thicknesses are manufactured to order and have minimum order requirements: 120mm (minimum order: 16 x pallets).
Product Information
General information about Rockwool Flexi
Product Application
Thermal and Acoustic flexi edge Building Slab
Rockwools versatile flexi edge building slab, Rockwool Flexi, is suitable for use in pitched roof rafters, framed external walls, internal partitions, intermediate floors, separating walls and floors, and timber suspended ground floors.
Product Make-up
Core
Durable non-combustable stone wool spun from volcanic rock, resin bonded into slabs with a unique flexible edge along one side.
Product Properties
| Thickness | 50mm to 140mm | |
| Slab Length | 1.2m | |
| Slab Width | 0.4m and 0.6m | |
| Slab Edge | Square |
Product Prices
Buy Rockwool Flexi
Limited stock of the most popular thicknesses are held at most of our depots. Where we need to bring stock in from the manufacturer, please allow up to 2 weeks for delivery
- Generally 1 or 3 working days for delivery
- Generally 1 to 5 working days for delivery
- Generally 5 to 10 working days for delivery
- Special request or made to order item, allow extended lead times. Minimum order levels may apply.
- Please call to check availability and approximate lead times
Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations
Product Performance and Guides
Product Performance, Manufacturer Downloads, and Installation Guides
Product Performance
| Thermal Conductivity | 0.038 - 0.035 W/mK | |
| Fire Performance | Classification A1 | BS EN 13501-1 |
| Surface Spread of Flame | Non-combustable | |
| Nominal Density | approx. 33 kg/m³ | |
| Vapour Resistance | Negligable |
| Product | Thickness | Thermal Resistance | kg/m³ | kg/m² |
|---|---|---|---|---|
| Flexi 50mm | 50mm | 1.32 m²K/W | 33 kg/m³ | 1.65 kg/m² |
| Flexi 60mm | 60mm | 1.58 m²K/W | 33 kg/m³ | 1.98 kg/m² |
| Flexi 70mm | 70mm | 1.84 m²K/W | 33 kg/m³ | 2.31 kg/m² |
| Flexi 90mm | 90mm | 2.37 m²K/W | 33 kg/m³ | 2.97 kg/m² |
| Flexi 100mm | 100mm | 2.63 m²K/W | 33 kg/m³ | 3.30 kg/m² |
| Flexi 120mm | 120mm | 3.16 m²K/W | 33 kg/m³ | 3.96 kg/m² |
| Flexi 140mm | 140mm | 4.00 m²K/W | 33 kg/m³ | 4.62 kg/m² |
Product Certificates
Please visit the Rockwool website for product certificates.