What is solid wall insulation UK?

In the UK, solid wall insulation is used for properties built without wall cavities. These are often older brick or stone homes. It adds an insulating layer to either the interior or exterior surface of your walls and is an effective solution to enhance warmth and minimise heat loss.

What is solid wall insulation made of?

It can be made from a variety of materials, including EPS, XPS, PIR, phenolic foam, or mineral wool. Each type offers its own benefits, often combining fire resistance, acoustic insulation, and exceptional thermal performance. Some materials, such as phenolic foam, offer high thermal insulation in thin profiles and are a good choice when indoor space is limited.

What is external solid wall insulation?

External insulants for solid walls are available as insulating boards and are fixed to the outer wall surface. The insulation is then covered with a waterproof render or decorative finish. It keeps the home interior warm without affecting interior space, and can give your property a fresh new look.

How to install solid wall insulation?

Installation depends on whether you’re insulating internally or externally. For external systems, attach insulation boards to the outer walls, add mesh reinforcement, and finish with render. For internal systems, fix insulated plasterboards or battens to interior walls, skim and apply finishing coats to the surface. Ensure airtightness and vapour control details are correctly integrated to prevent moisture issues. Always follow the manufacturer's guidance or consult a professional installer for the best results.

How much does solid wall insulation cost?

The cost of solid wall insulation depends on factors such as the material used, wall area, and method of installation. On average, external wall insulation is pricier than internal systems but offers better long-term performance and savings. For accurate pricing, check our online store or speak to our support team for a tailored quote.

Solid Wall Insulation At Low Wholesale Price

140mm Recticel Eurothane GP PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

140mm Recticel Eurothane GP is a polyisocyanurate (PIR) insulation core with composite aluminium foil facings on both sides. Recticel is a multi-purpose insulation board suitable for use in pitched roofs, ceilings, floors and walls.

£60.65£72.78 Ex VATInc VAT
£21.06£25.27 Per M2 Add to cart

150mm Ecotherm Eco-Versal Rigid PIR Insulation Board 2400mm x 1200mm (8' x 4') 2.88m2

Ecotherm-Eco-Versal-Insulation-Board-Pitched-Roof-Application

Ecotherm-Eco-Versal-Insulation-Board-Floor-Application

Ecotherm-Eco-Versal-Insulation-Board-Pitched-Wall-Application

150mm Ecotherm Eco-Versal Rigid PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

The 150mm Ecotherm Eco-Versal is a polyisocyanurate (PIR) insulation core with composite aluminium foil facings on both sides. Ecotherm Eco-Versal is a multi-purpose insulation board suitable for use in pitched roofs, ceilings, floors and walls.

£51.28£61.54 Ex VATInc VAT
£17.81£21.37 Per M2 Add to cart

150mm IKO Enertherm ALU PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

IKO-Enotherm-PIR-Insulation-Board-Pitched-Roof

IKO-PIR-Insulation-Board-Therm-Floor-Application

150mm IKO Enertherm ALU PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

150mm IKO Enertherm ALU PIR (polyisocyanurate) insulation is a top-quality insulation board featuring a rigid PIR foam core and reflective aluminium foil facings. It delivers outstanding thermal performance and moisture resistance, making it suitable for various installations and an ideal choice for different energy-efficient projects.

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150mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′)

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Insulating-solid-walls-with-internal-dry-lining-insulation-boards-fixed-by-battens

Insulating-solid-walls-with-internal-dry-lining-–-insulation-boards-fixed-to-battens

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150mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′)

150mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.

POA Get a quote

150mm Recticel Eurothane GP PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

150mm Recticel Eurothane GP is a polyisocyanurate (PIR) insulation core with composite aluminium foil facings on both sides. Recticel is a multi-purpose insulation board suitable for use in pitched roofs, ceilings, floors and walls.

£61.11£73.33 Ex VATInc VAT
£21.22£25.46 Per M2 Add to cart

20mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

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20mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

20mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.

POA Get a quote

25mm Celotex PIR Insulated Plasterboard 1200mm x 2400mm + 12.5mm P/B 2.88m2

Celotex-Insulated-Plasterboard-PL-Wall-Application

25mm Celotex PIR Insulated Plasterboard 1200mm x 2400mm + 12.5mm P/B 2.88m2

25mm + 12.5mm Celotex PL4025 PIR Insulated Plasterboard is it is suitable for use in roof and internal wall lining applications. Celotex Insulated Plasterboard is a high performance, easy to install PIR insulation board with a paper facing, laminated to a piece of 12.5mm tapered edge plasterboard.

£36.53£43.84 Ex VATInc VAT
£12.68£15.22 Per M2 Add to cart

25mm Celotex TB4025 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

Celotex-PIR-Insulation-Board-Floor2-Application

Celotex-Insulation-Wholesale-Board-Wall2-Application

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25mm Celotex TB4025 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

25mm Celotex TB4025 is a polyisocyanurate (PIR) insulation core with composite aluminium foil facings on both sides. Celotex is a multi-purpose insulation board suitable for use in pitched roofs, ceilings, floors and walls.

£15.35£18.42 Ex VATInc VAT
£5.33£6.40 Per M2 Add to cart

25mm Ecotherm Eco-Versal PIR Insulation Board 2400mm x 1200mm (8' x 4') 2.88m2

25mm Ecotherm Eco-Versal PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

25mm Ecotherm Eco-Versal is a polyisocyanurate (PIR) insulation core with composite aluminium foil facings on both sides. Ecotherm Eco-Versal is a multi-purpose insulation board suitable for use in pitched roofs, ceilings, floors and walls.

£14.34£17.21 Ex VATInc VAT
£4.98£5.98 Per M2 Add to cart

25mm IKO Enertherm ALU PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

25mm IKO Enertherm ALU PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

25mm IKO Enertherm ALU PIR (polyisocyanurate) insulation is a top-quality insulation board featuring a rigid PIR foam core and reflective aluminium foil facings. It delivers outstanding thermal performance and moisture resistance, making it suitable for various installations and an ideal choice for different energy-efficient projects.

POA Get a quote

25mm Mannok PIR Insulated Plasterboard 1200mm x 2400mm + 12.5mm P/B 2.88m2

Mannok Therm Laminate-Kraft / MLK PIR 25mm + 12.5mm PIR Insulated plasterboard is a high performance, fibre-free insulated board. Mannok Therm Laminate-Kraft / MLK PIR has a kraft paper facing on one side and plasterboard bonded to the other side.

POA Get a quote

25mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

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25mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

25mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.

POA Get a quote

25mm Recticel Eurothane GP PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

25mm Recticel Eurothane GP is a polyisocyanurate (PIR) insulation core with composite aluminium foil facings on both sides. Recticel is a multi-purpose insulation board suitable for use in pitched roofs, ceilings, floors and walls.

£16.10£19.32 Ex VATInc VAT
£5.59£6.71 Per M2 Add to cart

30mm Celotex TB4030 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

Celotex-PIR-Insulation-Wholesale-Wall-Application

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30mm Celotex TB4030 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

30mm Celotex TB4030 is a polyisocyanurate (PIR) insulation core with composite aluminium foil facings on both sides. Celotex is a multi-purpose insulation board suitable for use in pitched roofs, ceilings, floors and walls.

£18.99£22.79 Ex VATInc VAT
£6.59£7.91 Per M2 Add to cart

30mm Ecotherm Eco-Versal PIR Insulation Board 2400mm x 1200mm (8' x 4') 2.88m2

30mm Ecotherm Eco-Versal PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

30mm Ecotherm Eco-Versal is a polyisocyanurate (PIR) insulation core with composite aluminium foil facings on both sides. Ecotherm Eco-Versal is a multi-purpose insulation board suitable for use in pitched roofs, ceilings, floors and walls.

£17.74£21.29 Ex VATInc VAT
£6.16£7.39 Per M2 Add to cart

30mm IKO Enertherm ALU PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

30mm IKO Enertherm ALU PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

30mm IKO Enertherm ALU PIR (polyisocyanurate) insulation is a top-quality insulation board featuring a rigid PIR foam core and reflective aluminium foil facings. It delivers outstanding thermal performance and moisture resistance, making it suitable for various installations and an ideal choice for different energy-efficient projects.

POA Get a quote

30mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

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30mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

30mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.

POA Get a quote

30mm Recticel Eurothane GP PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

30mm Recticel Eurothane GP is a polyisocyanurate (PIR) insulation core with composite aluminium foil facings on both sides. Recticel is a multi-purpose insulation board suitable for use in pitched roofs, ceilings, floors and walls.

£19.44£23.33 Ex VATInc VAT
£6.75£8.10 Per M2 Add to cart

37.5mm Recticel Eurothane PL Insulated Plasterboard 2400mm x 1200mm (8′ x 4′) 2.88m2

Recticel-Insulated-Plasterboard-Roof-Application

Recticel-Eurothane-PIR-Insulation-Board2

37.5mm Recticel Eurothane PL Insulated Plasterboard 2400mm x 1200mm (8′ x 4′) 2.88m2

37.5mm Recticel Eurothane PL pairs high-performance insulation with plasterboard, making homes warmer with a sleek, easy-fit design.

£38.68£46.42 Ex VATInc VAT
£13.43£16.12 Per M2 Add to cart

38mm Mannok PIR Insulated Plasterboard 1200mm x 2400mm + 12.5mm P/B 2.88m2

Mannok Therm Laminate-Kraft / MLK PIR 38mm + 12.5mm PIR Insulated plasterboard is a high performance, fibre-free insulated board. Mannok Therm Laminate-Kraft / MLK PIR has a kraft paper facing on one side and plasterboard bonded to the other side.

POA Get a quote

40mm Celotex PIR Insulated Plasterboard 1200mm x 2400mm + 12.5mm P/B 2.88m2

40mm Celotex PIR Insulated Plasterboard 1200mm x 2400mm + 12.5mm P/B 2.88m2

40mm Celotex PL4040 PIR Insulated Plasterboard is it is suitable for use in roof and internal wall lining applications. Celotex Insulated Plasterboard is a high performance, easy to install PIR insulation board with a paper facing, laminated to a piece of 12.5mm tapered edge plasterboard.

£45.45£54.54 Ex VATInc VAT
£15.78£18.94 Per M2 Add to cart

40mm Celotex TB4040 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

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40mm Celotex TB4040 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

40mm Celotex TB4040 is a polyisocyanurate (PIR) insulation core with composite aluminium foil facings on both sides. Celotex is a multi-purpose insulation board suitable for use in pitched roofs, ceilings, floors and walls.

£22.13£26.56 Ex VATInc VAT
£7.68£9.22 Per M2 Add to cart

40mm Ecotherm Eco-Versal PIR Insulation Board 2400mm x 1200mm (8' x 4') 2.88m2

40mm Ecotherm Eco-Versal PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

40mm Ecotherm Eco-Versal is a polyisocyanurate (PIR) insulation core with composite aluminium foil facings on both sides. Ecotherm Eco-Versal is a multi-purpose insulation board suitable for use in pitched roofs, ceilings, floors and walls.

£20.68£24.82 Ex VATInc VAT
£7.18£8.62 Per M2 Add to cart

40mm IKO Enertherm ALU PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

40mm IKO Enertherm ALU PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

40mm IKO Enertherm ALU PIR (polyisocyanurate) insulation is a top-quality insulation board featuring a rigid PIR foam core and reflective aluminium foil facings. It delivers outstanding thermal performance and moisture resistance, making it suitable for various installations and an ideal choice for different energy-efficient projects.

POA Get a quote

40mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

There are 10 more images

40mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

40mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.

POA Get a quote

40mm Recticel Eurothane GP PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

40mm Recticel Eurothane GP is a polyisocyanurate (PIR) insulation core with composite aluminium foil facings on both sides. Recticel is a multi-purpose insulation board suitable for use in pitched roofs, ceilings, floors and walls.

£22.74£27.29 Ex VATInc VAT
£7.90£9.48 Per M2 Add to cart

50mm Celotex PIR Insulated Plasterboard 1200mm x 2400mm + 12.5mm P/B 2.88m2

50mm Celotex PIR Insulated Plasterboard 1200mm x 2400mm + 12.5mm P/B 2.88m2

50mm + 12.5mm Celotex PL4050 PIR Insulated Plasterboard is it is suitable for use in roof and internal wall lining applications. Celotex Insulated Plasterboard is a high performance, easy to install PIR insulation board with a paper facing, laminated to a piece of 12.5mm tapered edge plasterboard.

£47.63£57.16 Ex VATInc VAT
£16.54£19.85 Per M2 Add to cart

50mm Ecotherm Eco-Versal PIR Insulation Board 2400mm x 1200mm (8' x 4') 2.88m2

50mm Ecotherm Eco-Versal PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

50mm Ecotherm Eco-Versal is a polyisocyanurate (PIR) insulation core with composite aluminium foil facings on both sides. Ecotherm Eco-Versal is a multi-purpose insulation board suitable for use in pitched roofs, ceilings, floors and walls.

£21.66£25.99 Ex VATInc VAT
£7.52£9.02 Per M2 Add to cart

50mm IKO Enertherm ALU PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

50mm IKO Enertherm ALU PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

50mm IKO Enertherm ALU PIR (polyisocyanurate) insulation is a top-quality insulation board featuring a rigid PIR foam core and reflective aluminium foil facings. It delivers outstanding thermal performance and moisture resistance, making it suitable for various installations and an ideal choice for different energy-efficient projects.

POA Get a quote

50mm Mannok PIR Insulated Plasterboard 1200mm x 2400mm + 12.5mm P/B 2.88m2

Mannok Therm Laminate-Kraft / MLK PIR 50mm + 12.5mm PIR Insulated plasterboard is a high performance, fibre-free insulated board. Mannok Therm Laminate-Kraft / MLK PIR has a kraft paper facing on one side and plasterboard bonded to the other side.

POA Get a quote

50mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

There are 10 more images

50mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

50mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.

POA Get a quote

50mm Recticel Eurothane GP PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

50mm Recticel Eurothane GP is a polyisocyanurate (PIR) insulation core with composite aluminium foil facings on both sides. Recticel is a multi-purpose insulation board suitable for use in pitched roofs, ceilings, floors and walls.

£24.88£29.86 Ex VATInc VAT
£8.64£10.37 Per M2 Add to cart