Is 75mm insulation enough for walls?

In many situations, yes. A 75mm insulation thickness board provides solid thermal performance for both refurbishments and new builds. Whether it is enough depends on the wall type, existing construction, and the target U-value. In older buildings, adding a 75mm thick insulation board often brings a dramatic improvement. In new builds, it may be used alongside other layers as part of a wider insulation system

How to fix 75mm insulation board?

Walls: Mechanically fix the boards to masonry or timber, often with supplementary adhesive. Roofs: Fix boards between or below rafters using screws and washers. Floors: Boards are usually laid tightly together, either loose-laid (floating) or mechanically restrained, depending on the floor system.

How to cut 75mm insulation board?

Use: A fine-tooth hand saw, or insulation saw A straight edge to guide the cut A stable surface so the board does not bend Score the facing material first, then cut through the insulation core in steady passes.

Where to buy a 75mm insulation board?

You can buy an insulation 75mm thickness board online from Insulation Wholesale. We stock EPS, phenolic, and PIR options in this thickness, ready to go from UK stock. Our team supports trade and commercial projects, so we offer trade discounts, pallet deals, and a fast quote process when you need numbers quickly. We focus on low wholesale pricing and fast nationwide delivery, including delivery to your site.

75mm Insulation Board At Wholesale Prices

Showing all 8

Products in 75mm Insulation Board

In stock only

Clear All Thermal

75mm Celotex CW4075 Cavity Wall Insulation Board 1200mm x 450mm 4.32m2 Pack of 8 (4.32m2)

75mm Celotex CW4075 Cavity Wall Insulation Board is an easy to install polyisocyanurate (PIR) insulation board with excellent thermal performance, featuring a low emissivity foil facing.

£66.11£79.33 Ex VATInc VAT
£15.30£18.36 Per M2
Add to cart
There are 2 more images
75mm Celotex GA4075 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

75mm Celotex GA4075 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.

£34.26£41.11 Ex VATInc VAT
£11.90£14.28 Per M2
Add to cart
75mm Ecotherm Eco-Versal Rigid PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

75mm 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.

£34.38£41.26 Ex VATInc VAT
£11.94£14.33 Per M2
Add to cart
75mm Recticel Eurothane GP PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

75mm 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.

£33.02£39.62 Ex VATInc VAT
£11.47£13.76 Per M2
Add to cart
75mm Ecotherm Eco-Cavity Partial Fill Insulation Board 1200mm x 450mm Pack of 6 (3.24m2)

75mm Ecotherm Eco-Cavity wall insulation boards are ideal for masonry walls. They achieve high levels of thermal performance for thinner constructions whilst maintaining a clear residual air gap; effective protection against driving rain, particularly in coastal and exposed locations.

POA
Get a quote
75mm IKO Enertherm ALU PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2

75mm 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
Get a quote
There are 8 more images
75mm Kingspan Therma TP10 / TF70 / TW55 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) Pack of 4 (11.52m2)
All three models 75mm Kingspan Therma PIR Insulation Board:
- 75mm Thermapitch TP10
- 75mm Thermafloor TF70
- 75mm 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.
£186.00£223.20 Ex VATInc VAT
£16.15£19.38 Per M2
Add to cart
75mm Unilin Thin-R PIR Insulation Board 2400mm x 1200mm (8′ x 4′) Pallet of 32 (92.16m2)

75mm 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
Get a quote