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100mm Celotex CW4100 Cavity Wall Insulation Board 1200mm x 450mm 3.24m2 Pack of 6 (3.24m2)
100mm Celotex CW4100 Cavity Wall Insulation Board is an easy to install polyisocyanurate (PIR) insulation board with excellent thermal performance, featuring a low emissivity foil facing.
£62.06£74.47 Ex VATInc VAT£19.15£22.98 Per M2 Add to cart -
100mm Celotex GA4100 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
100mm Celotex GA4100 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.
£36.82£44.18 Ex VATInc VAT£12.78£15.34 Per M2 Add to cart -
100mm Ecotherm Eco-Versal Rigid PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
100mm 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.
£40.34£48.41 Ex VATInc VAT£14.01£16.81 Per M2 Add to cart -
100mm Jablite HP+ 70E External Wall Insulation Board 1200mm x 600mm (4′ X 2′) Pack of 6 (4.32m2)
100mm Jablite HP+ 70E External Wall Insulation Board is designed to enhance thermal efficiency for external walls. It can be bonded or mechanically fixed, providing reliable insulation solution.
£54.70£65.64 Ex VATInc VAT£12.66£15.19 Per M2 Add to cart -
100mm Kingspan Kooltherm K108 Cavity Board Insulation 1200mm x 450mm Pack of 5 (2.70m2)
100mm Kingspan Kooltherm K108 partial fill cavity wall board is a premium performance lower lambda insulation with a rigid thermoset fibre-free phenolic core. It is faced on both sides with a low emissivity composite foil facing and is used in partially filled cavity walls.
£113.62£136.34 Ex VATInc VAT£42.08£50.50 Per M2 Add to cart -
100mm Recticel Eurothane GP PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
100mm 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.
£37.18£44.62 Ex VATInc VAT£12.91£15.49 Per M2 Add to cart -
100mm Recticel Eurowall Partial Cavity Wall Insulation Board 1200mm x 450mm Pack of 10 (5.40m2)
100mm Recticel Eurowall Partial Cavity is an advanced thermal insulation panel tailored for use in cavity wall systems, delivering exceptional energy efficiency and robust performance.
£110.29£132.35 Ex VATInc VAT£20.42£24.50 Per M2 Add to cart -
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.
£45.43£54.52 Ex VATInc VAT£15.77£18.92 Per M2 Add to cart -
110mm Unilin Thin-R PIR Insulation Board 2400mm x 1200mm (8′ x 4′) Pallet of 21 (60.48m2)
110mm Unilin Thin-R PIR insulation is a foil faced, high-performance insulation solution that offers exceptional thermal efficiency and durability. This polyisocyanurate insulation board, formerly known as Xtratherm, is ideal for a range of applications, such as floors, pitched roofs, and walls.
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115mm Celotex Thermaclass Cavity Wall 21 Insulation Board 1190mm x 450mm Pack of 5 (2.67m2)
115mm Celotex Thermaclass Cavity Wall 21 is a PIR T&G insulation board designed for full-fill cavity wall applications. Low-emissivity foil facing provides versatility during installation, allowing for a 10mm residual cavity.
£137.98£165.58 Ex VATInc VAT£51.68£62.02 Per M2 Add to cart -
115mm Kingspan Kooltherm K106 Cavity Board Insulation 1200mm x 450mm Pack of 4 (2.16m2)
115mm Kingspan Kooltherm K106 Cavity Board is a premium performance insulation with a fibre-free rigid thermoset phenolic core with a thermal conductivity of just 0.019 W/mK across all thicknesses.
£113.03£135.64 Ex VATInc VAT£52.33£62.80 Per M2 Add to cart -
115mm Recticel Eurowall Full Fill Cavity Wall Insulation Board 1200mm x 460mm Pack of 8 (4.41m2)
115mm Recticel Eurowall Full Fill boards snap together with interlocking edges, forming a continuous thermal barrier that optimises performance of cavity wall insulation.
£122.96£147.55 Ex VATInc VAT£27.88£33.46 Per M2 Add to cart -
120mm Celotex XR4120 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
120mm Celotex XR4120 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.
£46.38£55.66 Ex VATInc VAT£16.10£19.32 Per M2 Add to cart -
120mm Ecotherm Eco-Versal Rigid PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
120mm 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.
£50.68£60.82 Ex VATInc VAT£17.60£21.12 Per M2 Add to cart -
120mm Kingspan Kooltherm K112 Framing Insulation Board 2400mm x 1200mm Pack of 2 (5.76m2)
120mm Kingspan Kooltherm K112 Framing Board is a premium performance insulation with a fibre-free rigid thermoset phenolic core. It is used to insulate timber and steel framing systems with thermal conductivity of just 0.019 W/mK across all thicknesses.
£333.92£400.70 Ex VATInc VAT£57.97£69.56 Per M2 Add to cart -
120mm Recticel Eurothane GP PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
120mm 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.
£45.86£55.03 Ex VATInc VAT£15.92£19.10 Per M2 Add to cart -
130mm Celotex XR4130 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
130mm Celotex XR4130 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.
£60.85£73.02 Ex VATInc VAT£21.13£25.36 Per M2 Add to cart -
140mm Celotex XR4140 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
140mm Celotex XR4140 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.
£57.43£68.92 Ex VATInc VAT£19.94£23.93 Per M2 Add to cart -
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.
£53.14£63.77 Ex VATInc VAT£18.45£22.14 Per M2 Add to cart -
140mm Recticel Eurowall Full Fill Cavity Wall Insulation Board 1200mm x 460mm Pack of 8 (4.41m2)
140mm Recticel Eurowall Full Fill boards snap together with interlocking edges, forming a continuous thermal barrier that optimises performance of cavity wall insulation.
£150.09£180.11 Ex VATInc VAT£34.03£40.84 Per M2 Add to cart -
150mm Celotex XR4150 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
150mm Celotex XR4150 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.
£55.56£66.67 Ex VATInc VAT£19.29£23.15 Per M2 Add to cart -
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.
£60.22£72.26 Ex VATInc VAT£20.91£25.09 Per M2 Add to cart -
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.
£53.56£64.27 Ex VATInc VAT£18.60£22.32 Per M2 Add to cart -
20mm Jablite HP+ 70E External Wall Insulation Board 1200mm x 600mm (4′ X 2′) Pack of 30 (21.60m2)
20mm Jablite HP+ 70E External Wall Insulation Board is designed to enhance thermal efficiency for external walls. It can be bonded or mechanically fixed, providing reliable insulation solution.
£54.07£64.88 Ex VATInc VAT£2.50£3.00 Per M2 Add to cart -
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.
£41.49£49.79 Ex VATInc VAT£14.41£17.29 Per M2 Add to cart -
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.
£14.03£16.84 Ex VATInc VAT£4.87£5.84 Per M2 Add to cart -
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1-34 35+ £42.66£51.19 £41.81£50.17 
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.
£42.66£51.19 Ex VATInc VAT£14.81£17.77 Per M2 Add to cart -
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.
£14.11£16.93 Ex VATInc VAT£4.90£5.88 Per M2 Add to cart -
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.
£16.51£19.81 Ex VATInc VAT£5.73£6.88 Per M2 Add to cart -
30mm Jablite HP+ 70E External Wall Insulation Board 1200mm x 600mm (4′ X 2′) Pack of 20 (14.40m2)
30mm Jablite HP+ 70E External Wall Insulation Board is designed to enhance thermal efficiency for external walls. It can be bonded or mechanically fixed, providing reliable insulation solution.
£54.29£65.15 Ex VATInc VAT£3.77£4.52 Per M2 Add to cart -
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.
£17.03£20.44 Ex VATInc VAT£5.91£7.09 Per M2 Add to cart -
37.5mm Kingspan Kooltherm K118 Insulated Plasterboard 2400mm x 1200mm Pack of 21 (60.48m2)
25mm + 12.5mm Kingspan Kooltherm K118 Insulated Plasterboard is a premium performance insulation with a fibre-free rigid thermoset phenolic core. It is an insulated plasterboard for mechanically fixed and adhesively bonded insulated dry-lining th a thermal conductivity of just 0.019 W/mK across all thicknesses.
£1,429.07£1,714.88 Ex VATInc VAT£23.63£28.36 Per M2 Add to cart -
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.
£42.78£51.34 Ex VATInc VAT£14.85£17.82 Per M2 Add to cart -
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.
£49.10£58.92 Ex VATInc VAT£17.05£20.46 Per M2 Add to cart -
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.
£20.90£25.08 Ex VATInc VAT£7.26£8.71 Per M2 Add to cart -
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.
£21.21£25.45 Ex VATInc VAT£7.36£8.83 Per M2 Add to cart
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Wall Insulation Board
Wall insulation boards are essential building materials that help keep interiors warm and energy-efficient. Most of these boards create a thermal and acoustic barrier that enhances comfort and efficiency year-round.
They are suitable for both external and internal walls, making them ideal for new builds, retrofits, and energy upgrades.
What is the wall insulation board?
A wall insulation board is a rigid or semi-rigid panel that forms a continuous thermal and acoustic barrier to reduce heat transfer and sound transmission through walls.
Commonly made from PIR, EPS, or mineral wool, wall insulation boards balance efficiency, safety, and practicality in one simple installation.
For interior upgrades, acoustic insulated plasterboard or sound proofing plasterboard provides insulation and a ready-to-finish surface. For external walls, rigid insulation boards act as the main layer in external wall insulation systems, improving the building’s envelope and weather protection.
What is wall insulation board used for?
Wall insulation boards can be fitted across various building applications to control temperature, noise, and condensation. Common uses include:
- Internal walls: Plaster insulation boards or acoustic insulated plasterboard for warmth and soundproofing.
- External walls: Fitted as external wall insulation boards under render or cladding systems for improved weather resistance and energy efficiency.
- Cavity walls: Installed as cavity wall insulation boards to prevent air leakage and thermal bridging.
- Partitions and separating walls: Used as sound insulation wall panels for improved acoustic performance.
- Loft conversions and refurbishments: To help meet Part L energy requirements in older homes.
Types of wall insulation board
We supply a complete selection of wall insulation boards tailored for every build type and performance need:
- PIR Wall Insulation Boards: High-performance boards with low thermal conductivity and strong compressive strength.
- EPS Wall Insulation Boards: Lightweight, cost-effective insulation for cavity and external wall systems.
- Mineral Wool Wall Boards: Fire-resistant and sound-absorbing. Ideal for acoustic and safety-focused applications.
- Plaster Insulation Boards: Combined rigid insulation and plasterboard for fast, dual-purpose wall lining.
- Acoustic Insulated Plasterboard: Ideal for soundproofing internal partitions and media rooms.
- External Wall Insulation Boards: Designed for use under render or rainscreen façades for enhanced energy performance.
Benefits of wall insulation board
A wall insulation board does more than keep your home warm. It transforms your space into an energy-efficient, quiet, and resilient structure. Here is what else it offers:
- Improved thermal comfort: Keeps interiors warmer in winter and cooler in summer.
- Enhanced energy efficiency: Reduces heat loss through walls, helping achieve compliance with current UK U-value requirements.
- Sound control: Sound insulation wall panels and acoustic plasterboards block unwanted noise for quieter living.
- Moisture resistance: External and cavity boards resist damp and help prevent condensation buildup. Best results when paired with vapour control layers in moisture-prone areas.
- Easy installation: Suitable for dot-and-dab fixing, mechanical fastening, or adhesive systems.
- Potential energy savings: Cuts energy costs by reducing reliance on heating and air conditioning systems.
Why choose our wall insulation board?
Here’s what makes Insulation Wholesale the trusted choice for wall insulation boards in the UK:
- Wide range of internal, external, and cavity wall boards – including acoustic and plaster-insulated options.
- Trade-friendly prices, bulk savings, and expert advice from our technical team.
- Fast, reliable delivery across the UK for both housing and commercial builds.
Discover wall insulation boards that deliver warmth, soundproofing, and compliance. From plaster insulation boards that finish and insulate in one step, to a comprehensive external wall insulation board range for complete façade systems, shop now at Insulation Wholesale for trade-ready pricing and fast UK delivery.
At Insulation Wholesale, you can purchase Wall Insulation Board at low wholesale prices with fast delivery for most of items within 2-5 days. Competitive rates guaranteed.
FAQ
How to install wall insulation board?
- Step: Clean and prepare the wall surface.
- Step: Fix the boards, ensuring no gaps between them.
- Step: Apply adhesive dots or use mechanical fixings to secure each board.
- Step: Seal all joints with insulation tape.
- Step: Skim or finish with plasterboard as required.
- Step: Add a vapour control layer to minimise condensation (optional).
How do you attach insulation board to a wall?
You can attach insulation boards using strong construction adhesive, insulation fixings, or a combination of both. The direct dot-and-dab method is used primarily for plasterboard-backed options.
How to add insulation to interior walls?
The easiest way is to use internal wall insulating panels or acoustic insulated plasterboard. These are two-in-one products that combine insulation with a ready-to-finish surface. Simply fix them to internal walls, seal the joints, and skim for a seamless finish.
What is the cheapest way to insulate internal walls from inside?
Expanded Polystyrene (EPS) wall insulation boards are the most budget-friendly option. They’re light, easy to cut, and deliver solid performance at an affordable price, making them ideal for DIY or large-scale refits.
