Flexi®
Flexi® is a non-combustible, multi-use, dual purpose acoustic and thermal stone wool insulation slab with a flexible edge along one side.
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Application(s)
- Roof
- Floors & Ceilings
- Internal Wall
- Ground Floors
- Separating Walls
- Drylining & Partitions
- Separating Floors
Product description
ROCKWOOL Flexi is manufactured with a flexible edge which supports a close fit between the insulation and the supporting framework. The insulation can be fitted between fresh timber and will expand into the wider space as the timber dries out and shrinks back. ROCKWOOL Flexi is Euroclass A1 non-combustible as defined in EN 13501-1 and provides additional thermal and acoustic benefits in application.
It is suitable for use all over the home, in pitched roof rafters, framed external walls, internal partitions, intermediate floors, separating walls and floors, and timber suspended ground floors.
- Euroclass A1 in accordance with BS EN 13501-1 Reaction to Fire rating
- Thermal conductivity 0.038 W/mK (50-120mm)
- Thermal conductivity 0.035 W/mK (≥ 140mm)
- Classified in accordance with BS EN 13162:2012
- Density exceeds 10kg/m³ in accordance with Approved Document E
Areas of application
Applications for Flexi are:
- Pitched roof between the rafter
- Attic loft floor
- Timber frame
- Timber stud wall
- Metal stud wall
- Suspended floor
Documentation
Flexi Datasheet
Flexi® is a non-combustible, multi-use, dual purpose acoustic and thermal stone wool insulation slab with a flexible edge along one side.
ROCKWOOL Stone Wool BSI Kitemark Certificate
Certificate No. km06661-bs-en-13162-2012-a1-2015
Flexi Installation Guide
Installation guidelines for ROCKWOOL Flexi®
SUIS ROCKWOOL UK
Safe use instruction sheet ROCKWOOL stone wool insulation products
Republic of Ireland Price List
Price List March 2025
UK Price List
Price List March 2025
Certificates
Product properties
| Name | Value | Test standard | Symbol | Unit |
|---|---|---|---|---|
| Declared thermal conductivity | 0.038 | EN 826 | λD | W/mK |
| Reaction to Fire | A1 | EN 13501-1 | Euroclass | |
| Long term water absorption | NPD | EN 12087 | WL(P) | kg/m² |
| Short term water absorption | NPD | EN 1609 | WS | kg/m² |
| Product standard | EN 13162:2012+A1:2015 | |||
| Facing type, side 1 | No Facing |
Product variants
Flexi® provides simple solution for Triangle House Grand Designs case study
With the race on to complete the project in time, ROCKWOOL FLEXI® slab became an integral piece in this complex 3D geometrical jigsaw.
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