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

150mm Isover CWS 36 Cavity Wall Slab 3.28m2 Pack

150mm Isover CWS 36 Cavity Wall Slab 3.28m2 Pack

150mm Isover CWS 36 Cavity Wall Slab offers excellent thermal insulation for cavity walls, effectively reducing heat loss and boosting energy efficiency. Lightweight and easy to install, it delivers reliable, long-lasting performance.

£26.91£32.29 Ex VATInc VAT
£8.20£9.84 Per m2 Get restock alert

20mm Kingspan Therma TP10 / TF70 / TW55 PIR Insulation Board 2400mm x 1200mm (8' x 4') Pack of 15 (43.20m2)

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20mm Kingspan Therma TP10 / TF70 / TW55 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) Pack of 15 (43.20m2)

All three models 20mm Kingspan Therma PIR Insulation Board:

20mm Thermapitch TP10
20mm Thermafloor TF70
20mm Thermawall TW55

share the same high-performance PIR core and low-emissivity foil facings, offering excellent thermal efficiency and easy installation. Although labeled differently, these boards share identical technical specifications.

No longer in production.

£326.73£392.08 Ex VATInc VAT
£7.56£9.07 Per M2 Get restock alert

25mm Thick 140mm Pipe Diameter Kingspan Kooltherm Pipe Lagging 1000mm

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25mm Thick 140mm Pipe Diameter Kingspan Kooltherm Pipe Lagging 1000mm

25mm Thick 140mm 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.

£30.56£36.67 Ex VATInc VAT Get restock alert

25mm Thick 219mm Pipe Diameter Kingspan Kooltherm Pipe Lagging 1000mm

25mm Thick 219mm Pipe Diameter Kingspan Kooltherm Pipe Lagging 1000mm

25mm Thick 219mm 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.

£50.19£60.23 Ex VATInc VAT Get restock alert

25mm Thick 48mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

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25mm Thick 48mm Pipe Diameter Rockwool Rocklap Aluminium Foil Faced Pipe Lagging 1000mm

25mm 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.

£8.09£9.71 Ex VATInc VAT Get restock alert

3mm Pliteq Geniemat Underscreed FF03NP 1.22m x 12.19m Acoustic Layer

Pliteq Geniemat FFNP is a flat, resilient acoustic underlay mat designed to be installed directly under a screed. When installed under a screed the acoustic mats will provide impact sound reduction, helping you meet sound insulation performance standards. Made from recycled tyres. This product is sold as roll.

£73.11£87.73 Ex VATInc VAT
£4.92£5.90 Per m2 Get restock alert

40mm SuperFOIL SF19BB Breathable Thermal Insulation Roll 1.5m x 10m (15m2)

SF19BB is SuperFOIL’s first fully breathable insulation for use in roofs and walls. Breathable Insulation save on time and materials by providing both the secondary rain barrier breathable membrane and insulation at the same time, this can reduce installation time and save on extra battens.

£126.09£151.31 Ex VATInc VAT
£8.41£10.09 Per M2 Get restock alert

5mm Pliteq Geniemat Underscreed FF05NP 1.22m x 9.14m Acoustic Layer

Pliteq Geniemat FFNP is a flat, resilient acoustic underlay mat designed to be installed directly under a screed. When installed under a screed the acoustic mats will provide impact sound reduction, helping you meet sound insulation performance standards. Made from recycled tyres. This product is sold as roll.

£69.99£83.99 Ex VATInc VAT
£6.28£7.54 Per m2 Get restock alert

60mm Superglass Multi Acoustic Roll Insulation 13.50m2 Roll

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60mm Superglass Multi Acoustic Roll Insulation 13.50m2 Roll

60mm Superglass Acoustic Partition Roll (APR) is a lightweight, non-combustible glass mineral wool insulation roll. It is suitable for the following applications: internal walls and floors, timber and metal stud partitions, drylining systems and separating walls and floors. Manufactured at a minimum density of 10kg/m³.

£29.41£35.29 Ex VATInc VAT
£2.18£2.62 Per m2 Get restock alert

60mm URSA Acoustic Partition Roll Insulation 12m2 Roll

60mm URSA Acoustic Partition Roll Insulation 12m2 Roll

60mm 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.

£40.97£49.16 Ex VATInc VAT
£3.41£4.09 Per m2 Get restock alert

65mm Multi-Layer SuperFOIL SF40 Insulation Roll 1.5m x 10m (15m2)

65mm SF40 is Superfoil‘s extra performance multifoil insulation. Extremely cost effective with a 68% increase in performance over our standard multifoil

£222.87£267.44 Ex VATInc VAT
£14.86£17.83 Per M2 Get restock alert

6mm British Gypsum Gyproc F Multiboard 2400mm x 1200mm (8′ x 4′) 2.88m2

6mm Glasroc F Multiboard is a high-performance, moisture- and fire-resistant gypsum board reinforced with glass fibers, making it a durable choice for demanding environments like fire-rated partitions and ceilings.

£46.98£56.38 Ex VATInc VAT
£16.31£19.57 Per M2 Get restock alert

80mm Superglass Multi Acoustic Roll Insulation 12.48m2 Roll

80mm Superglass Multi Acoustic Roll Insulation 12.48m2 Roll

80mm Superglass Acoustic Partition Roll (APR) is a lightweight, non-combustible glass mineral wool insulation roll. It is suitable for the following applications: internal walls and floors, timber and metal stud partitions, drylining systems and separating walls and floors. Manufactured at a minimum density of 10kg/m³.

£40.15£48.18 Ex VATInc VAT
£3.22£3.86 Per m2 Get restock alert

85mm URSA 32 Cavity Wall Insulation Slab 3.69m2 Pack

85mm URSA 32 Cavity Wall Insulation Slab 3.69m2 Pack

85mm URSA Cavity Batt is a lightweight, semi-rigid glass mineral wool slab treated with silicon-based water repellent. It is suitable for use in both fully and partially filled masonry cavity walls up to 25m high.

£31.65£37.98 Ex VATInc VAT Get restock alert

90mm Recticel Eurowall Partial Cavity Wall Insulation Board 1200mm x 450mm Pack of 10 (5.40m2)

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90mm Recticel Eurowall Partial Cavity Wall Insulation Board 1200mm x 450mm Pack of 10 (5.40m2)

90mm Recticel Eurowall offers rigid great performance insulation boards designed for partial cavity walls. They lock in warmth and boost energy efficiency with ease.

£120.94£145.13 Ex VATInc VAT
£22.40£26.88 Per M2 Get restock alert