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

Showing 97–102 of 102 results

In stock only

110mm Ecotherm Eco-Versal Rigid PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

110mm 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.

£42.77£51.32 Ex VATInc VAT
£14.85£17.82 Per M2 Get restock alert
110mm Recticel Eurothane GP PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

110mm 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.

£51.84£62.21 Ex VATInc VAT
£18.00£21.60 Per M2 Get restock alert
125mm Ecotherm Eco-Versal Rigid PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

125mm 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.
£47.69£57.23 Ex VATInc VAT
£16.56£19.87 Per M2 Get restock alert
Would you be happy to accept alternative product?

Below are the alternative products for this item:

125mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2 (IW8921)
125mm Unilin Thin-R PIR Insulation Board 2400mm x 1200mm (8′ x 4′) (IW2315)
130mm Ecotherm Eco-Versal Rigid PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

130mm 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.

£49.17£59.00 Ex VATInc VAT
£17.07£20.48 Per M2 Get restock alert
130mm Recticel Eurothane GP PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

130mm 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.

£59.62£71.54 Ex VATInc VAT
£20.70£24.84 Per M2 Get restock alert
140mm Ecotherm Eco-Versal Rigid PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

The 140mm 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.

£54.00£64.80 Ex VATInc VAT
£18.75£22.50 Per M2 Get restock alert

110mm Ecotherm Eco-Versal Rigid PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

110mm Recticel Eurothane GP PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

125mm Ecotherm Eco-Versal Rigid PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

130mm Ecotherm Eco-Versal Rigid PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

130mm Recticel Eurothane GP PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

140mm Ecotherm Eco-Versal Rigid PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2