Where can I buy loft insulation with specific thickness options?

You can buy loft insulation by thickness online from Insulation Wholesale. We stock a full range of loft insulation thickness options for trade and DIY. Our prices are competitive, plus we offer pallet deals, fast quote turnaround, and fast nationwide delivery to your site.

How does loft insulation thickness affect home heating bills?

Because heat escapes through poorly insulated roof spaces, increasing loft insulation thickness reduces heat transfer. Less heat loss means: Fewer boiler cycles Radiators run for shorter periods Internal temperature stays stable longer All that translates to lower fuel consumption. The thicker (within reason and properly installed), the better the thermal resistance, up to the point where regulatory targets are met.

Best loft insulation products by thickness for energy efficiency?

For cold lofts: 270mm mineral wool (cross-layered) is cost-effective and widely used. 300mm mineral wool further improves performance. High-performance mineral wool with lower lambda values delivers better results at lower thicknesses. Rigid PIR boards are used in warm roof designs where insulation sits at rafter level instead. The best option depends on roof type, target U-value, and available height.

What thickness should my loft insulation be?

Start by measuring what is already there to determine how much insulation you need to add. If you’ve got 100mm of Knauf insulation installed, you are below modern expectations. Topping up to around 270mm is usually advised for a cold loft. If you are working on a regulated project, check the required U-value first. That determines the correct loft insulation depth.

Loft Insulation By Thickness | Low Wholesale Prices

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Products in Loft Insulation By Thickness

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80mm Kingspan Therma TP10 / TF70 / TW55 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) Pack of 4 (11.52m2)
All three models 80mm Kingspan Therma PIR Insulation Board:
- 80mm Thermapitch TP10
- 80mm Thermafloor TF70
- 80mm 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.
£214.38£257.26 Ex VATInc VAT
£18.61£22.33 Per M2
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80mm Unilin Thin-R PIR Insulation Board 2400mm x 1200mm (8′ x 4′) Pallet of 28 (80.64m2)

80mm 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.

POA
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90mm Ecotherm Eco-Bond PIR Insulation Board 1200mm x 1200mm (4′ x 4′) Pack of 3 (4.32m2)
POA
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90mm IKO Enertherm ALU PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

90mm 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
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90mm Rockwool Flexi Slab Acoustic Insulation 1200mm x 600mm 86.40m2 Pallet

90mm Rockwool Flexi has been designed as a multi-use, dual-purpose acoustic and thermal mineral wool insulation with a unique flexible edge along one side. It is suitable for use all over the home, in pitched roof rafters, framed external walls, internal partitions, intermediate floors, separating walls and floors, and timber suspended ground floors.

POA
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90mm Unilin Thin-R PIR Insulation Board 2400mm x 1200mm (8′ x 4′) Pallet of 24 (69.12m2)

90mm 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.

POA
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110mm Celotex XR4110 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

110mm Celotex XR4110 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.

£49.13£58.96 Ex VATInc VAT
£17.06£20.47 Per M2
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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.

£63.64£76.37 Ex VATInc VAT
£22.10£26.52 Per M2
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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.

£56.17£67.40 Ex VATInc VAT
£19.50£23.40 Per M2
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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.
£319.28£383.14 Ex VATInc VAT
£7.39£8.87 Per M2
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