ROCKWOOL Flexi is a premium stone wool insulation slab designed for high-performance thermal insulation, acoustic soundproofing, and fire protection in residential and commercial construction projects throughout Ireland. Featuring ROCKWOOL’s unique flexible edge technology, Flexi insulation provides a tighter friction fit between timber studs, metal frames, rafters, and joists—helping to eliminate gaps and improve overall thermal efficiency.
Ideal for insulating internal partition walls, timber frame walls, suspended timber floors, ceilings, attic spaces, loft conversions, and roof applications, ROCKWOOL Flexi is a versatile insulation solution trusted by builders, contractors, and self-build homeowners.
Manufactured from durable stone wool mineral insulation, ROCKWOOL Flexi delivers excellent thermal performance with a low thermal conductivity of 0.038 W/mK, helping reduce heat loss and lower energy bills. Its dense fibre structure also offers exceptional acoustic insulation, making it ideal for reducing noise transfer between rooms, floors, and adjoining living spaces.
As a Euroclass A1 non-combustible insulation slab, ROCKWOOL Flexi provides the highest level of fire protection, helping to improve building safety and meet modern building regulation requirements. Unlike standard insulation slabs, the innovative flexible edge compresses and expands to fit uneven stud spacing, making installation faster, easier, and more secure.
Perfect for new builds, home renovations, extensions, attic upgrades, and commercial fit-outs, ROCKWOOL Flexi is one of the most popular insulation products in Ireland for high-quality wall and floor insulation.
Key Benefits:
✔ High-performance thermal insulation – 0.038 W/mK Lambda
✔ Excellent acoustic soundproofing performance
✔ Euroclass A1 non-combustible fire-rated insulation
✔ Unique flexible edge for tighter fitting installation
✔ Reduces gaps and thermal bridging
✔ Water repellent and vapour permeable
✔ Easy to cut, install, and handle on site
✔ Suitable for walls, floors, roofs, ceilings & timber frame construction
