Cavity & Internal Wall Insulation

We offer a wide range of cavity and internal wall insulation products, including PIR, phenolic, mineral wool and glass wool solutions from the most reputable brands.

Choose from a variety cavity and internal wall insulation products to suit your requirements.

We offer a wide range of cavity and internal wall insulation products, including PIR, phenolic, mineral wool and glass wool solutions from the most reputable brands.

Choose from a variety cavity and internal wall insulation products to suit your requirements.

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Rockwool RWA45 Acoustic Insulation Slab
Rockwool RWA45 Acoustic Insulation Slab

ROCKWOOL RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. RWA45 is made up of high-quality resin bonded slabs in a variety of thicknesses and densities. Specialist facings are available to order to meet the specifications of unique projects. RWA45 is rated Euroclass A1 non-combustible, providing the highest level of fire performance. Using RWA45 in ceilings, walls and floors can help to compartmentalise rooms, reducing fire spread and damage. RWA45 insulation slabs achieve Lambda 0.035 W/mK and are available in seven standard thicknesses from 25-100mm, with a density of 45 kg/m3.

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£13.91

pack ex. VAT

EcoTherm Eco-Liner Thermal Laminate 2400mm x 1200mm
EcoTherm Eco-Liner Thermal Laminate 2400mm x 1200mm

EcoTherm Eco-Liner Thermal Laminate is a 2 in 1 insulated dry lining board for fix and dab applications. It comprises a fibre free rigid polyisocyanurate (PIR) insulation core bonded to 12.5mm tapered edge gypsum plasterboard using proprietary gypsum adhesive. The 2 in 1 board insulates and dry lines walls in one application.

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£31.99

sheet ex. VAT

Knauf Earthwool Acoustic Partition Roll
Knauf Earthwool Acoustic Partition Roll

Earthwool Acoustic Rolls are non-combustible Glass Mineral Wool rolls, manufactured using Knauf Insulation's revolutionary ECOSE Technology and are specialist sound insulating products for use in new build and retrofit internal wall and floor applications. Rolls are 1200mm wide and ready-cut to produce 2 x 600mm wide rolls.

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£23.50

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Kingspan Kooltherm K108 Cavity Board 1200mm x 450mm
Kingspan Kooltherm K108 Cavity Board 1200mm x 450mm

Kingspan Kooltherm K108 Cavity Board is a premium performance insulation with a fibre-free rigid thermoset phenolic core. As part of our Kooltherm K100 range, it provides a level of performance that is unrivalled in the world of rigid thermoset insulation materials with a thermal conductivity of just 0.018 W/mK across all thicknesses. Kingspan Kooltherm K108 Cavity Board is manufactured with a blowing agent that has zero ODP and low GWP.

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£76.84

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Knauf Earthwool DriTherm Cavity Slab 37
Knauf Earthwool DriTherm Cavity Slab 37

Earthwool DriTherm Cavity Slabs are non-combustible Glass Mineral Wool slabs, manufactured using Knauf Insulation's revolutionary ECOSE Technology and a water repellent additive, designed for use in external masonry cavity walls to provide a full-fill insulation solution which is installed as walls are being built. They are 455mm wide to suit standard vertical wall tie spacings allowing a closed joint with adjacent slabs.

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£12.88

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Celotex Thermal Laminate Board 2400mm x 1200mm
Celotex Thermal Laminate Board 2400mm x 1200mm

Celotex Thermal Laminate Board is a thermal laminate product featuring 12.5mm tapered edge plasterboard bonded to a high performance, rigid polyisocyanurate (PIR) insulation board. Celotex PL4000 reduces installation time by combining thermal insulation and an internal lining in one operation. Suitable for use in new build and refurbishment projects, it can be fixed across the face of timber frame studs, or joists and rafters in pitched and cold (ventilated) flat roofs. It can also be fixed to the internal face of existing solid walls or cavity walls to upgrade their thermal performance.

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£34.49

sheet ex. VAT

Celotex Cavity Wall Insulation 1200mm x 450mm
Celotex Cavity Wall Insulation 1200mm x 450mm

Celotex Cavity Wall Insulation is a partial fill insulation solution for masonry cavity walls. Celotex CW4000 is a high performance, rigid polyisocyanurate (PIR) insulation board suitable for use in new buildings and extensions. Sized to fit between cavity wall ties, it is easy to handle and install.

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£49.16

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Kingspan Kooltherm K118 Insulated Plasterboard 2400mm x 1200mm
Kingspan Kooltherm K118 Insulated Plasterboard 2400mm x 1200mm

Kingspan Kooltherm K118 Insulated Plasterboard is a premium performance insulation with a fibre-free rigid thermoset phenolic core. Manufactured with a blowing agent that has zero ODP and low GWP, it is an insulated plasterboard for mechanically fixed and adhesively bonded insulated dry-lining.

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£729.98

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Kingspan Kooltherm K7 Pitched Roof Board 2400mm x 1200mm
Kingspan Kooltherm K7 Pitched Roof Board 2400mm x 1200mm

Kingspan Kooltherm K7 Pitched Roof Board is a premium performance pitched roof insulation that provides a thermal conductivity between 0.020 W/mK and 0.023 W/mK. With a fibre-free rigid thermoset phenolic core and a low emissivity foil outer face, Kingspan Kooltherm K7 delivers superior thermal performance with easy to handle rigid boards, resulting in an efficient installation process. Manufactured with a blowing agent that has zero ODP and low GWP, it is used to insulate tiled or slated pitched warm roof spaces.

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£168.47

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Rockwool Flexi Acoustic Insulation Slab
Rockwool Flexi Acoustic Insulation Slab

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. The FLEXI slab is manufactured with the patented flexible edge which ensures a perfect fit is maintained 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. Other types of insulation can often become displaced resulting in cold spots or poor acoustics. FLEXI provides excellent thermal and acoustic performance as well as being A1 classified non-combustible for fire resistance. ROCKWOOL FLEXI is easy to install and has optimum effectiveness. 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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£26.25

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Rockwool RW5 Acoustic Insulation Slab
Rockwool RW5 Acoustic Insulation Slab

ROCKWOOL RW5 has been developed for thermal, acoustic and fire performance in a range of construction types. RW5 is made up of high-quality resin bonded slabs in a variety of thicknesses and densities. Specialist facings are available to order to meet the specifications of unique projects. RW5 is rated Euroclass A1 non-combustible, providing the highest level of fire performance. Using RW5 in ceilings, walls and floors can help to compartmentalise rooms, reducing fire spread and damage. RW5 insulation slabs achieve Lambda 0.034 W/mK and are available in five standard thicknesses from 25-100mm, with a density of 100 kg/m3.

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EcoTherm Eco-Cavity Wall Insulation 1200mm x 450mm
EcoTherm Eco-Cavity Wall Insulation 1200mm x 450mm

EcoTherm Eco-Cavity Insulation is a PIR insulation board suitable for partial fill cavity wall applications. It comprises a fibre free rigid polyisocyanurate (PIR) insulation core with aluminium foil composite to both sides. The boards are conveniently sized to co-ordinate with brick and block dimensions and allow the insertion of wall ties at the appropriate spacing.

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£41.43

pack ex. VAT

Kingspan Kooltherm K106 Cavity Board 1200mm x 450mm
Kingspan Kooltherm K106 Cavity Board 1200mm x 450mm

Kingspan Kooltherm K106 Cavity Board is a premium performance insulation with a fibre-free rigid thermoset phenolic core. As part of our Kooltherm K100 range, it provides a level of performance that is unrivalled in the world of rigid thermoset insulation materials with a thermal conductivity of just 0.018 W/mK across all thicknesses. Manufactured with a blowing agent that has zero ODP and low GWP, it is used to insulate cavity walls with just a 10mm residual cavity.

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£66.44

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Kingspan Kooltherm K12 Framing Board 2400mm x 1200mm
Kingspan Kooltherm K12 Framing Board 2400mm x 1200mm

Kingspan Kooltherm K12 Framing Board is a premium performance insulation that provides a thermal conductivity between 0.020 W/mK and 0.023 W/mK. With a fibre-free rigid thermoset phenolic core and a low emissivity foil outer face, Kingspan Kooltherm K12 delivers superior thermal performance with easy to handle boards, resulting in an efficient installation process. Manufactured with a blowing agent that has zero ODP and low GWP, it is used to insulate timber and steel framing systems.

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£211.08

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Rockwool RW6 Acoustic Insulation Slab
Rockwool RW6 Acoustic Insulation Slab

ROCKWOOL RW6 has been developed for thermal, acoustic and fire performance in a range of construction types. RW6 is made up of high-quality resin bonded slabs in a variety of thicknesses and densities. Specialist facings are available to order to meet the specifications of unique projects. RW6 is rated Euroclass A1 non-combustible, providing the highest level of fire performance. Using RW6 in ceilings, walls and floors can help to compartmentalise rooms, reducing fire spread and damage. RW6 insulation slabs achieve Lambda 0.035 W/mK and are available in three standard thicknesses from 50-100mm, with a density of 140 kg/m3.

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Kingspan TW50 1200mm x 450mm
Kingspan TW50 1200mm x 450mm

Kingspan Thermawall TW50 is a high performance insulation with a fibre-free rigid thermoset polyisocyanurate (PIR) core. It is used to insulate cavity walls, and has a thermal conductivity of 0.022 W/mK.

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Knauf Earthwool OmniFit Slab Multi-Use 600mm
Knauf Earthwool OmniFit Slab Multi-Use 600mm

Earthwool OmniFit Slabs are non-combustible Glass Mineral Wool slabs, manufactured using Knauf Insulation's revolutionary ECOSE Technology, designed for use in multiple applications in both timber and steel frame construction to allow flexibility across a range of projects.

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Rockwool Sound Insulation Slab 1200mm x 600mm
Rockwool Sound Insulation Slab 1200mm x 600mm

ROCKWOOL Sound Insulation Slab is made from mineral wool insulation, with a non-directional fibre orientation and high density, meaning sound waves are trapped and vibrations dampened. The acoustic slab also repels water and is vapour permeable, resisting rot and mold. In addition to its acoustic insulation properties, ROCKWOOL Sound Insulation Slab offers exceptional fire performance, capable of withstanding temperatures of up to 1000 degrees centigrade and has achieved the highest Euroclass A1 fire resistance classification.

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Rockwool RW4 Acoustic Insulation Slab
Rockwool RW4 Acoustic Insulation Slab

ROCKWOOL RW4 has been developed for thermal, acoustic and fire performance in a range of construction types. RW4 is made up of high-quality resin bonded slabs in a variety of thicknesses and densities. Specialist facings are available to order to meet the specifications of unique projects. RW4 is rated Euroclass A1 non-combustible, providing the highest level of fire performance. Using RW4 in ceilings, walls and floors can help to compartmentalise rooms, reducing fire spread and damage. RW4 insulation slabs achieve Lambda 0.034 W/mK and are available in three standard thicknesses from 50-100mm, with a density of 80 kg/m3.

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Knauf Earthwool Flexi Slab
Knauf Earthwool Flexi Slab

Earthwool Flexible Slabs are high performance non-combustible Rock Mineral Wool slabs with flexible edges on all four sides, manufactured using Knauf Insulation's revolutionary ECOSE Technology, and are designed for use in multiple applications. They have excellent thermal performance and non-combustible A1 Euroclass Reaction to Fire classification.

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