Where to buy insulation by thickness?

You can buy insulation by thickness from Insulation Wholesale. We stock multiple materials across a full depth range, so you can choose the material that best fits your construction build-up, without compromising. Our team helps match insulation thickness to your application, whether for floors, walls, roofs, or specialist applications. We supply UK stock and support both trade and DIY customers with clear advice and reliable delivery.

What insulation thickness is best?

There is no single “best” insulation thickness. The right choice depends on the space available, the target U‑value, and the material used. A thinner high‑performance foam can outperform a thicker fibrous product, while deeper mineral wool can give better sound control and fire resistance. Choose the thickest insulation that fits without compression while complying with UK Building Regulations.

Can different materials be mixed at the same thickness?

Yes, you may combine materials - as long as they are compatible and correctly detailed. You can combine a rigid board layer with mineral wool of the same depth to improve thermal control and sound absorption, for example. The key is to maintain continuity with no air gaps. Do a full vapour control and condensation risk assessment before combining materials.

Insulation By Thickness At Wholesale Prices

25mm Thick 54mm Diameter Rockwool Insulated Fire Sleeve 300mm

25mm Thick 54mm Diameter Rockwool Insulated Fire Sleeve 300mm

25mm thick 54mm diameter Rockwool FirePro Insulated Fire Sleeves are constructed from stone wool fibres and graphite intumescent material to safeguard pipework. They are designed to slow the progression of fire while providing enhanced thermal insulation.

£53.70£64.44 Ex VATInc VAT Add to cart

25mm Thick 54mm Pipe Diameter Kingspan Kooltherm Pipe Lagging 1000mm

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25mm Thick 54mm Pipe Diameter Kingspan Kooltherm Pipe Lagging 1000mm

25mm Thick 54mm Pipe Diameter Insulation is an efficient, fiber-free solution that wraps pipes in a sleek layer of high-performance thermal protection, redefining energy-saving insulation.

£14.24£17.09 Ex VATInc VAT Add to cart

25mm Thick 60mm Diameter Rockwool Insulated Fire Sleeve 300mm

25mm Thick 60mm Diameter Rockwool Insulated Fire Sleeve 300mm

25mm thick 60mm diameter Rockwool FirePro Insulated Fire Sleeves are constructed from stone wool fibres and graphite intumescent material to safeguard pipework. They are designed to slow the progression of fire while providing enhanced thermal insulation.

£55.81£66.97 Ex VATInc VAT Add to cart

25mm Thick 60mm Pipe Diameter Kingspan Kooltherm Pipe Lagging 1000mm

25mm Thick 60mm Pipe Diameter Kingspan Kooltherm Pipe Lagging 1000mm

25mm Thick 60mm Pipe Diameter Insulation is an efficient, fiber-free solution that wraps pipes in a sleek layer of high-performance thermal protection, redefining energy-saving insulation.

£15.73£18.88 Ex VATInc VAT Add to cart

25mm Thick 60mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

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25mm Thick 60mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

25mm Thick 60mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging (length – 1000mm) is a premium thermal insulation material engineered to improve energy efficiency and minimise heat loss in pipe systems.

£9.28£11.14 Ex VATInc VAT Add to cart

25mm Thick 67mm Diameter Rockwool Insulated Fire Sleeve 300mm

25mm Thick 67mm Diameter Rockwool Insulated Fire Sleeve 300mm

25mm thick 67mm diameter Rockwool FirePro Insulated Fire Sleeves are constructed from stone wool fibres and graphite intumescent material to safeguard pipework. They are designed to slow the progression of fire while providing enhanced thermal insulation.

£55.81£66.97 Ex VATInc VAT Add to cart

25mm Thick 67mm Pipe Diameter Kingspan Kooltherm Pipe Lagging 1000mm

25mm Thick 67mm Pipe Diameter Kingspan Kooltherm Pipe Lagging 1000mm

25mm Thick 67mm Pipe Diameter Insulation is an efficient, fiber-free solution that wraps pipes in a sleek layer of high-performance thermal protection, redefining energy-saving insulation.

£16.67£20.00 Ex VATInc VAT Add to cart

25mm Thick 67mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

25mm Thick 67mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

25mm Thick 67mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging (length – 1000mm) is a premium thermal insulation material engineered to improve energy efficiency and minimise heat loss in pipe systems.

£10.14£12.17 Ex VATInc VAT Add to cart

25mm Thick 76mm Diameter Rockwool Insulated Fire Sleeve 300mm

25mm Thick 76mm Diameter Rockwool Insulated Fire Sleeve 300mm

25mm thick 76mm diameter Rockwool FirePro Insulated Fire Sleeves are constructed from stone wool fibres and graphite intumescent material to safeguard pipework. They are designed to slow the progression of fire while providing enhanced thermal insulation.

£63.18£75.82 Ex VATInc VAT Add to cart

25mm Thick 76mm Pipe Diameter Kingspan Kooltherm Pipe Lagging 1000mm

25mm Thick 76mm Pipe Diameter Kingspan Kooltherm Pipe Lagging 1000mm

25mm Thick 76mm Pipe Diameter Insulation is an efficient, fiber-free solution that wraps pipes in a sleek layer of high-performance thermal protection, redefining energy-saving insulation.

£18.70£22.44 Ex VATInc VAT Add to cart

25mm Thick 76mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

25mm Thick 76mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

25mm Thick 76mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging (length – 1000mm) is a premium thermal insulation material engineered to improve energy efficiency and minimise heat loss in pipe systems.

£10.99£13.19 Ex VATInc VAT Add to cart

25mm Thick 89mm Diameter Rockwool Insulated Fire Sleeve 300mm

25mm Thick 89mm Diameter Rockwool Insulated Fire Sleeve 300mm

25mm thick 89mm diameter Rockwool FirePro Insulated Fire Sleeves are constructed from stone wool fibres and graphite intumescent material to safeguard pipework. They are designed to slow the progression of fire while providing enhanced thermal insulation.

£66.34£79.61 Ex VATInc VAT Add to cart

25mm Thick 89mm Pipe Diameter Kingspan Kooltherm Pipe Lagging 1000mm

25mm Thick 89mm Pipe Diameter Kingspan Kooltherm Pipe Lagging 1000mm

25mm Thick 89mm Pipe Diameter Insulation is an efficient, fiber-free solution that wraps pipes in a sleek layer of high-performance thermal protection, redefining energy-saving insulation.

£19.93£23.92 Ex VATInc VAT Add to cart

25mm Thick 89mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

25mm Thick 89mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

25mm Thick 89mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging (length – 1000mm) is a premium thermal insulation material engineered to improve energy efficiency and minimise heat loss in pipe systems.

£12.09£14.51 Ex VATInc VAT Add to cart

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25mm Unilin Safe-R SR/PR Pitched Roof Phenolic Insulation Board 2400mm x 1200mm (8′ x 4′) Pallet of 96 (276.48m2)

25mm Unilin Safe-R Pitched Roof SR/PR provides top-tier thermal efficiency for sloped roofs, including ventilated, hybrid, and warm setups, ensuring excellent U-values with minimal impact on living space.

POA Get a quote

25mm URSA Acoustic Partition Roll Insulation 24m2 Roll

25mm URSA Acoustic Partition Roll Insulation 24m2 Roll

25mm URSA Acoustic Roll is a lightweight, non-combustible, unfaced glass mineral wool product for use as acoustic insulation in timber or metal framed internal partition walls, timber or metal framed separating walls and timber separating floors.

£41.45£49.74 Ex VATInc VAT
£1.73£2.08 Per m2 Add to cart

27mm British Gypsum Gyproc ThermaLine PLUS Plasterboard Tapered Edge 2400mm x 1200mm (8′ x 4′) Pallet of 30

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27mm British Gypsum Gyproc ThermaLine PLUS Plasterboard Tapered Edge 2400mm x 1200mm (8′ x 4′) Pallet of 30

27mm British Gypsum Gyproc ThermaLine PLUS Plasterboard is a high-performance insulated drywall solution, combining a strong gypsum core with an advanced thermal layer to enhance energy efficiency.

£1,855.39£2,226.47 Ex VATInc VAT Add to cart

2mm Correx Protection Board 2400mm x 1200mm (8′ x 4′) White Pack of 100 (288.00m2)

2mm Correx Surface Protection Sheet is a lightweight, flexible, waterproof and durable plastic sheeting that offers protection to floors and other surfaces. Correx Protection board is manufactured from strong corrugated polypropylene to provide lasting surface protection during construction and refurbishment.

‘Please note that these boards are white in colour but feature some transparency’

£394.82£473.78 Ex VATInc VAT
£1.37£1.64 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 Kingspan GreenGuard GG300 R Rigid Extruded Polystyrene Insulation Board 1250mm x 600mm Pack of 14 (10.50m2)

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30mm Kingspan GreenGuard GG300 R Rigid Extruded Polystyrene Insulation Board 1250mm x 600mm Pack of 14 (10.50m2)

30mm Kingspan GreenGuard GG300 is a high performance rigid extruded polystyrene insulation. It is used to insulate inverted roofs, basements, car park decks, and heavy-duty commercial, industrial and cold store flooring offering a thermal conductivities as low as 0.033 W/m·K

£64.73£77.68 Ex VATInc VAT
£6.16£7.39 Per M2 Add to cart

30mm Thick 17mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 17mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 17mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging (length – 1000mm) is a premium thermal insulation material engineered to improve energy efficiency and minimise heat loss in pipe systems.

£7.43£8.92 Ex VATInc VAT Add to cart

30mm Thick 21mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 21mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 21mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging (length – 1000mm) is a premium thermal insulation material engineered to improve energy efficiency and minimise heat loss in pipe systems.

£7.64£9.17 Ex VATInc VAT Add to cart

30mm Thick 27mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 27mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 27mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging (length – 1000mm) is a premium thermal insulation material engineered to improve energy efficiency and minimise heat loss in pipe systems.

£8.19£9.83 Ex VATInc VAT Add to cart

30mm Thick 34mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 34mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 34mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging (length – 1000mm) is a premium thermal insulation material engineered to improve energy efficiency and minimise heat loss in pipe systems.

£8.69£10.43 Ex VATInc VAT Add to cart

30mm Thick 42mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 42mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 42mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging (length – 1000mm) is a premium thermal insulation material engineered to improve energy efficiency and minimise heat loss in pipe systems.

£9.52£11.42 Ex VATInc VAT Add to cart

30mm Thick 48mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 48mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 48mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging (length – 1000mm) is a premium thermal insulation material engineered to improve energy efficiency and minimise heat loss in pipe systems.

£10.06£12.07 Ex VATInc VAT Add to cart

30mm Thick 54mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 54mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 54mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging (length – 1000mm) is a premium thermal insulation material engineered to improve energy efficiency and minimise heat loss in pipe systems.

£10.96£13.15 Ex VATInc VAT Add to cart

30mm Thick 60mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 60mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 60mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging (length – 1000mm) is a premium thermal insulation material engineered to improve energy efficiency and minimise heat loss in pipe systems.

£11.56£13.87 Ex VATInc VAT Add to cart

30mm Thick 67mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 67mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 67mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging (length – 1000mm) is a premium thermal insulation material engineered to improve energy efficiency and minimise heat loss in pipe systems.

£11.06£13.27 Ex VATInc VAT Add to cart

30mm Thick 76mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 76mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 76mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging (length – 1000mm) is a premium thermal insulation material engineered to improve energy efficiency and minimise heat loss in pipe systems.

£13.12£15.74 Ex VATInc VAT Add to cart

30mm Thick 89mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 89mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

30mm Thick 89mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging (length – 1000mm) is a premium thermal insulation material engineered to improve energy efficiency and minimise heat loss in pipe systems.

£15.46£18.55 Ex VATInc VAT Add to cart

37.5mm Kingspan Kooltherm K118 Insulated Plasterboard 2400mm x 1200mm Pack of 21 (60.48m2)

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Kingspan-Kooltherm-K118-Insulated-Plasterboard-Wall-Application

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