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100mm Rockwool Flexi Slab Acoustic Insulation 1200mm x 600mm 4.32m2 Pack
100mm Rockwool Flexi has been designed as a multi-use, dual-purpose acoustic and thermal mineral wool insulation with a unique flexible edge along one side. 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.
£42.91£51.49 Ex VATInc VAT£9.93£11.92 Per m2 Add to cart -
140mm Rockwool Flexi Slab Acoustic Insulation 1200mm x 600mm 2.88m2 Pack
140mm Rockwool Flexi has been designed as a multi-use, dual-purpose acoustic and thermal mineral wool insulation with a unique flexible edge along one side. 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.
£39.18£47.02 Ex VATInc VAT£13.60£16.32 Per m2 Add to cart -
100mm Knauf Rocksilk RS45 Building Insulation Slab 1200mm x 600mm 3.6m2 Pack
100mm Knauf Insulation Rocksilk RS45 is a Rock Mineral Wool slab, designed for use in multiple thermal and acoustic applications. It is non-combustible with the best possible Euroclass A1 reaction to fire classification.
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100mm Rockwool Rainscreen Duo Slab 1200mm x 600mm 46.08m2 Pallet
100mm Rainscreen Duo Slab is dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory applied water-repelling agent, acts to resist rain ingress during construction.
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125mm Rockwool Rainscreen Duo Slab 1200mm x 600mm 34.56m2 Pallet
125mm Rainscreen Duo Slab is dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory applied water-repelling agent, acts to resist rain ingress during construction.
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140mm Knauf Rocksilk Flexible Insulation Slab 1200mm x 600mm 2.16m2 Pack
140mm Knauf Insulation Rocksilk Flexible Slab is a Rock Mineral Wool slab, designed for use in multiple thermal and acoustic applications as well as the fire protection of a loft conversion floor. It is non-combustible with the best possible Euroclass A1 reaction to fire classification.
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150mm Rockwool Rainscreen Duo Slab 1200mm x 600mm 34.56m2 Pallet
150mm Rainscreen Duo Slab is dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory applied water-repelling agent, acts to resist rain ingress during construction.
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180mm Rockwool Flexi Slab Acoustic Insulation 1200mm x 600mm 25.92m2 Pallet
180mm Rockwool Flexi has been designed as a multi-use, dual-purpose acoustic and thermal mineral wool insulation with a unique flexible edge along one side. 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.
POA Get a quote -
180mm Rockwool Rainscreen Duo Slab 1200mm x 600mm 25.92m2 Pallet
180mm Rainscreen Du Slab is dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory applied water-repelling agent, acts to resist rain ingress during construction.
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25mm Knauf Rocksilk RS45 Building Insulation Slab 1200mm x 600mm 14.4m2 Pack
25mm Knauf Insulation Rocksilk RS45 is a Rock Mineral Wool slab, designed for use in multiple thermal and acoustic applications. It is non-combustible with the best possible Euroclass A1 reaction to fire classification.
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50mm Knauf Rocksilk RS45 Building Insulation Slab 1200mm x 600mm 7.2m2 Pack
50mm Knauf Insulation Rocksilk RS45 is a Rock Mineral Wool slab, designed for use in multiple thermal and acoustic applications. It is non-combustible with the best possible Euroclass A1 reaction to fire classification.
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50mm Rockwool Flexi Slab Acoustic Insulation 1200mm x 600mm 8.64m2 Pack
50mm Rockwool Flexi has been designed as a multi-use, dual-purpose acoustic and thermal mineral wool insulation with a unique flexible edge along one side. 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.
POA Get a quote -
50mm Rockwool Rainscreen Duo Slab 1200mm x 600mm 69.12m2 Pallet
50mm Rainscreen Duo Slab is dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory applied water-repelling agent, acts to resist rain ingress during construction.
POA Get a quote -
60mm Rockwool Flexi Slab Acoustic Insulation 1200mm x 600mm 103.68m2 Pallet
60mm Rockwool Flexi has been designed as a multi-use, dual-purpose acoustic and thermal mineral wool insulation with a unique flexible edge along one side. 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.
POA Get a quote -
60mm Rockwool Rainscreen Duo Slab 1200mm x 600mm 51.84m2 Pallet
60mm Rainscreen Duo Slab is dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory applied water-repelling agent, acts to resist rain ingress during construction.
POA Get a quote -
70mm Rockwool Flexi Slab Acoustic Insulation 1200mm x 600mm 92.16m2 Pallet
70mm Rockwool Flexi has been designed as a multi-use, dual-purpose acoustic and thermal mineral wool insulation with a unique flexible edge along one side. 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.
POA Get a quote -
75mm Knauf Rocksilk RS45 Building Insulation Slab 1200mm x 600mm 4.32m2 Pack
75mm Knauf Insulation Rocksilk RS45 is a Rock Mineral Wool slab, designed for use in multiple thermal and acoustic applications. It is non-combustible with the best possible Euroclass A1 reaction to fire classification.
POA Get a quote -
75mm Rockwool Rainscreen Duo Slab 1200mm x 600mm 51.84m2 Pallet
75mm Rainscreen Duo Slab is dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory applied water-repelling agent, acts to resist rain ingress during construction.
POA Get a quote -
90mm Rockwool Flexi Slab Acoustic Insulation 1200mm x 600mm 86.40m2 Pallet
90mm Rockwool Flexi has been designed as a multi-use, dual-purpose acoustic and thermal mineral wool insulation with a unique flexible edge along one side. 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.
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Timber Frame Insulation Non combustible
Timber frame insulation fills or covers the spaces between structural timber studs to reduce heat loss, improve sound control, and ensure compliance with UK Building Regulations.
What is external timber frame insulation?
External wall insulation for timber-framed systems adds a protective thermal layer around the structure. It balances indoor temperatures for greater comfort and shields the frame from moisture.
Adding insulation to timber frames maintains a continuous thermal envelope that reduces cold bridging, keeping the building warmer for longer. Timber frame insulation options include rigid PIR boards, mineral wool slabs, and breathable external wall insulation systems.
What is timber frame insulation used for?
Effective insulation is essential for timber-framed builds, extensions, and renovations, focusing on sustainability and reduced energy use.
Timber frame insulation is installed to:
- Improve insulation levels and achieve target U-values in both external and internal walls.
- Reduce heat loss and lower energy bills.
- Minimise sound transfer between rooms or from outside.
- Guard against condensation and potential timber damage.
- Create a more comfortable and energy-efficient living space.
- Improve energy ratings for new constructions and retrofits.
Types of external wall insulation for timber frame
Builders choose insulation in timber-framed walls based on build type, performance target, and budget. Common options include:
PIR insulation boards
Premium-grade and lightweight, they have excellent thermal conductivity and are ideal for external wall insulation timber frame builds with limited space.
Mineral wool insulation
A natural, sustainable option that enhances breathability. Perfect for green or fire-resistant builds.
EPS insulation
Recognised for their exceptional stability and strength. An economical and quick-to-fit solution suitable for external wall render systems.
Insulated plasterboard
A two-in-one combination of plasterboard and rigid insulation. Provides a smooth, ready-to-finish internal wall lining.
Benefits of timber frame insulation
Fitting quality insulation into framed timber walls offers several long-term advantages:
- Better heat retention: Stable indoor temperatures year-round.
- Energy efficiency: Heating demand goes down.
- Moisture control: Protects the frame from damp and condensation.
- Acoustic comfort: Reduces noise transfer between floors, rooms, and external walls.
- Fire safety: Many insulating materials for timber-framed systems meet Class A2-s1, d0 or Class B-s1, d0 fire ratings, depending on material.
- Regulatory compliance: Supports compliance with Part L thermal efficiency and Part B fire safety requirements.
- Durability: Offers long-term, consistent thermal and acoustic performance.
- Sustainability: Supports low-carbon construction and long-term environmental performance.
Why choose our insulation for timber frame?
At Insulation Wholesale, we stock a full range of timber frame insulation options for every project type and budget. Here’s why builders, architects, and homeowners across the UK choose us:
- High-performance products from trusted UK insulation brands.
- Options for both internal and external wall insulation timber frame systems.
- Fire-rated materials built to resist moisture for lasting performance.
- Expert technical advice for insulating a timber frame to meet U-value targets.
- Competitive trade pricing.
- Choose timber frame wall insulation products with BBA certification for verified quality and compliance.
- Insulation Wholesale supplies timber frame insulation across the UK.
- Trade discounts, fast nationwide delivery, and next-day delivery available.
Explore high-performance timber frame insulation boards, slabs, and systems designed for every build type. Shop now for trade pricing and fast UK delivery.
FAQ
What is the best insulation for timber frame homes?
The proper insulation for a timber frame home varies with project goals and energy priorities. PIR boards offer high efficiency in compact spaces, whereas mineral wool ensures dependable fire safety and acoustic comfort. For eco-builds, wood fibre insulation delivers natural breathability and sustainability.
What insulation for timber frame extension?
Choose materials that match the main structure’s performance and durability. PIR and mineral wool boards typically meet these standards. These can be fixed within the wall studs or externally.
What is timber frame insulation?
This covers any insulation material that limits heat transfer and dampens sound within timber-framed walls. The insulation is fixed internally between studs, externally under cladding or render, or as part of a full wall system for energy-efficient construction.
