Rockwool Flexi-Slab - All Sizes

The following sizes are sold in packs: 50mm x 600mm, 100mm x 600mm and 140mm x 600mm 

• ROCKWOOL FLEXI® is a versatile acoustic and thermal stone wool insulation slab with a patented flexible edge, ensuring a perfect fit with supporting frameworks.
• It easily adjusts to expanding timber, eliminating complicated measurements or alterations during installation.
• Suitable for various home applications, from roofs and walls to floors, eliminating the need for multiple insulation types.

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ROCKWOOL FLEXI® Slab - The Flexible, Multi-use Insulation Solution

Experience the new standard in insulation with ROCKWOOL FLEXI®, designed as a versatile, dual-purpose acoustic and thermal stone wool insulation slab. Crafted with a unique flexible edge along one side, this product promises to deliver the perfect fit, regardless of your project.

Features and Benefits

Adaptable and User-friendly: Designed with a patented flexible edge, ROCKWOOL FLEXI® maintains a perfect fit between the insulation and the supporting framework. It can easily be installed between fresh timber, expanding into the wider space as the timber dries and shrinks back. This hassle-free installation process eliminates the need for complicated measurements or alterations.

Multi-purpose: This product isn't limited to just one application. It's versatile and ideal for use across your home – from pitched roof rafters and framed external walls to internal partitions, intermediate floors, separating walls, floors, and even timber suspended ground floors. No more need for different insulation types – ROCKWOOL FLEXI® covers it all.

Non-combustible: Safety comes first with ROCKWOOL FLEXI®. This insulation is Euroclass A1 non-combustible, providing a safe and reliable insulation solution that can withstand high temperatures without igniting.

Acoustic and Thermal Benefits: Besides being a thermal insulator, ROCKWOOL FLEXI® also serves as an acoustic insulator, achieving Part E (resistance to sound) when installed according to ROCKWOOL guidelines. Keep your space cosy, quiet, and comfortable with this dual-purpose solution.

Standards and Certification

ROCKWOOL FLEXI® meets the BS EN 13162 product standard and has been marked with Keymark, Kitemark, and CE Marking, ensuring it meets all the required safety and quality standards.

Technical Properties

• Euroclass A1 (non-combustible)
• Thermal conductivity: 50-120mm 0.038 W/mK; 140mm> 0.035 W/mK
• Acoustic insulation: Achieves Part E (resistance to sound) when installed in accordance with ROCKWOOL guidelines
• Water vapour resistance: 5.2 MNs/gm
• Water repellent

Browse Other Rockwool Products

ROCKWOOL Roll: An ideal solution for roof and wall insulation. It comes in various sizes and is easy to cut-to-size for a perfect fit. With excellent thermal and acoustic insulation properties, it's suitable for a wide range of applications.

ROCKWOOL Duo Slab: This dual-density insulation slab provides outstanding thermal and fire protection. The unique dual density build makes it perfect for both external and internal wall insulation, and it comes in several thickness options to meet your insulation needs.

ROCKWOOL Cavity: Specifically designed for cavity wall insulation, ROCKWOOL Cavity is an exceptional choice for providing improved thermal performance and fire safety. It also has excellent moisture resistance properties.

ROCKWOOL RW3: This high-quality insulation board offers superior soundproofing and thermal performance. With its optimal density and flexibility, it's a great choice for insulating walls, floors, and ceilings.

Frequently Asked Questions

What is the ROCKWOOL FLEXI® slab made of? ROCKWOOL FLEXI® is made from stone wool, a material renowned for its excellent thermal and acoustic insulation properties.

Where can ROCKWOOL FLEXI® be installed in my home? ROCKWOOL FLEXI® is designed to be versatile and can be installed in various parts of your home, including pitched roof rafters, framed external walls, internal partitions, intermediate floors, separating walls and floors, and timber suspended ground floors.

Is ROCKWOOL FLEXI® fire-resistant? Yes, ROCKWOOL FLEXI® is Euroclass A1 non-combustible, which means it won't contribute to a fire's spread or generate significant smoke.

Does ROCKWOOL FLEXI® provide acoustic insulation? Absolutely. Besides its thermal properties, ROCKWOOL FLEXI® also offers excellent acoustic insulation, helping to reduce sound transmission when installed in accordance with ROCKWOOL guidelines.

How does ROCKWOOL FLEXI® contribute to soundproofing? When installed according to ROCKWOOL guidelines, FLEXI® achieves Part E (resistance to sound), which helps to reduce noise transmission between rooms or spaces in your home or building.

Does ROCKWOOL FLEXI® meet fire safety standards? Yes, ROCKWOOL FLEXI® is Euroclass A1 non-combustible, the highest ranking in terms of fire resistance. This means it doesn't contribute to the spread of fire, providing additional safety to your home.

How does the flexible edge of ROCKWOOL FLEXI® contribute to its installation? The patented flexible edge of ROCKWOOL FLEXI® ensures a perfect fit between the insulation and the supporting framework. It can be fitted between fresh timber and will expand into the wider space as the timber dries out and shrinks back. This makes the installation process easy and effective.

Can ROCKWOOL FLEXI® be installed in intermediate floors and separating walls? Absolutely! ROCKWOOL FLEXI® is a multi-use insulation solution suitable for installation in intermediate floors, separating walls and floors, and more. Its flexibility and fitting properties make it a versatile choice for various applications.

Is ROCKWOOL FLEXI® suitable for use in a pitched roof? Yes, ROCKWOOL FLEXI® can be used in pitched roof rafters. It provides excellent thermal and acoustic insulation properties, making it a great choice for a wide range of applications, including roofing.