50mm Rockwool Flexi Insulation Slab 1.2m x 400mm
ROCKWOOL Flexi is a stone wool insulation slab used across a wide range of domestic and commercial construction projects. It goes between studs in partitions and external walls, between joists in floors, and between rafters in roofs — and it stays put without slumping, cutting or fixing. The slab is made from natural volcanic rock spun into stone wool fibres, and it is manufactured with a flexible edge along one side that compresses on installation and then expands to grip the frame tightly from within.
This is the 50mm slab in the 400mm width — the most commonly used thickness for internal stud partitions and acoustic applications where frame depth is limited. The flexible Flexi Edge does the work of holding the slab in place, so there is no need to cut it to width or force it into the frame. It friction fits, stays put, and will not slump even if the timber studs shrink over time.
The slab achieves a thermal conductivity (lambda) of 0.038 W/mK and a Euroclass A1 reaction-to-fire classification, meaning it is fully non-combustible. At 50mm, it meets the minimum insulation depth required for a number of Approved Document E partition systems, including both the timber frame and metal frame lightweight domestic partition solutions that achieve Rw 42dB.
Benefits
- Suitable for stud partitions, wall linings, separating walls, floors and roofs
- Flexible Flexi Edge for a tight friction fit — no cutting to width required
- Will not slump, even if timber studs shrink after installation
- Euroclass A1 non-combustible — the highest possible reaction-to-fire classification
- Stone wool is vapour permeable, reducing the risk of condensation and mould
- Meets minimum depth for Approved Document E acoustic partition systems at Rw 42dB
- Endlessly recyclable — off-cuts can be returned via ROCKWOOL's Rockcycle service
Good to Know
- Size: 1200 x 400 x 50mm; weight: refer to ROCKWOOL datasheet for pack details
- Thermal conductivity: 0.038 W/mK to BS EN 13162:2012 + A1:2015
- Reaction to fire: Euroclass A1 to EN 13501-1
- Support with polypropylene netting or breather membrane in floor applications
- Install in accordance with current ROCKWOOL guidelines — visit rockwool.com/uk
- Always refer to the ROCKWOOL Flexi technical datasheet before installation
Product Information
Product Information
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Shipping & Returns
50mm Rockwool Flexi Insulation Slab 1.2m x 400mm
50mm Rockwool Flexi Insulation Slab 1.2m x 400mm
ROCKWOOL Flexi is a stone wool insulation slab used across a wide range of domestic and commercial construction projects. It goes between studs in partitions and external walls, between joists in floors, and between rafters in roofs — and it stays put without slumping, cutting or fixing. The slab is made from natural volcanic rock spun into stone wool fibres, and it is manufactured with a flexible edge along one side that compresses on installation and then expands to grip the frame tightly from within.
This is the 50mm slab in the 400mm width — the most commonly used thickness for internal stud partitions and acoustic applications where frame depth is limited. The flexible Flexi Edge does the work of holding the slab in place, so there is no need to cut it to width or force it into the frame. It friction fits, stays put, and will not slump even if the timber studs shrink over time.
The slab achieves a thermal conductivity (lambda) of 0.038 W/mK and a Euroclass A1 reaction-to-fire classification, meaning it is fully non-combustible. At 50mm, it meets the minimum insulation depth required for a number of Approved Document E partition systems, including both the timber frame and metal frame lightweight domestic partition solutions that achieve Rw 42dB.
Benefits
- Suitable for stud partitions, wall linings, separating walls, floors and roofs
- Flexible Flexi Edge for a tight friction fit — no cutting to width required
- Will not slump, even if timber studs shrink after installation
- Euroclass A1 non-combustible — the highest possible reaction-to-fire classification
- Stone wool is vapour permeable, reducing the risk of condensation and mould
- Meets minimum depth for Approved Document E acoustic partition systems at Rw 42dB
- Endlessly recyclable — off-cuts can be returned via ROCKWOOL's Rockcycle service
Good to Know
- Size: 1200 x 400 x 50mm; weight: refer to ROCKWOOL datasheet for pack details
- Thermal conductivity: 0.038 W/mK to BS EN 13162:2012 + A1:2015
- Reaction to fire: Euroclass A1 to EN 13501-1
- Support with polypropylene netting or breather membrane in floor applications
- Install in accordance with current ROCKWOOL guidelines — visit rockwool.com/uk
- Always refer to the ROCKWOOL Flexi technical datasheet before installation
Original: $37.88
-65%$37.88
$13.26Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
ROCKWOOL Flexi is a stone wool insulation slab used across a wide range of domestic and commercial construction projects. It goes between studs in partitions and external walls, between joists in floors, and between rafters in roofs — and it stays put without slumping, cutting or fixing. The slab is made from natural volcanic rock spun into stone wool fibres, and it is manufactured with a flexible edge along one side that compresses on installation and then expands to grip the frame tightly from within.
This is the 50mm slab in the 400mm width — the most commonly used thickness for internal stud partitions and acoustic applications where frame depth is limited. The flexible Flexi Edge does the work of holding the slab in place, so there is no need to cut it to width or force it into the frame. It friction fits, stays put, and will not slump even if the timber studs shrink over time.
The slab achieves a thermal conductivity (lambda) of 0.038 W/mK and a Euroclass A1 reaction-to-fire classification, meaning it is fully non-combustible. At 50mm, it meets the minimum insulation depth required for a number of Approved Document E partition systems, including both the timber frame and metal frame lightweight domestic partition solutions that achieve Rw 42dB.
Benefits
- Suitable for stud partitions, wall linings, separating walls, floors and roofs
- Flexible Flexi Edge for a tight friction fit — no cutting to width required
- Will not slump, even if timber studs shrink after installation
- Euroclass A1 non-combustible — the highest possible reaction-to-fire classification
- Stone wool is vapour permeable, reducing the risk of condensation and mould
- Meets minimum depth for Approved Document E acoustic partition systems at Rw 42dB
- Endlessly recyclable — off-cuts can be returned via ROCKWOOL's Rockcycle service
Good to Know
- Size: 1200 x 400 x 50mm; weight: refer to ROCKWOOL datasheet for pack details
- Thermal conductivity: 0.038 W/mK to BS EN 13162:2012 + A1:2015
- Reaction to fire: Euroclass A1 to EN 13501-1
- Support with polypropylene netting or breather membrane in floor applications
- Install in accordance with current ROCKWOOL guidelines — visit rockwool.com/uk
- Always refer to the ROCKWOOL Flexi technical datasheet before installation
