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80mm Celotex GA4080 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
80mm Celotex GA4080 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.
£38.60£46.32 Ex VATInc VAT£13.40£16.08 Per M2 Add to cart -
80mm Ecotherm Eco-Versal Rigid PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
80mm 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.
£38.78£46.54 Ex VATInc VAT£13.47£16.16 Per M2 Add to cart -
80mm Jablite HP+ 70E External Wall Insulation Board 1200mm x 600mm (4′ X 2′) Pack of 7 (5.04m2)
80mm 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.
£50.95£61.14 Ex VATInc VAT£10.11£12.13 Per M2 Add to cart -
80mm Kingspan GreenGuard GG300 R Rigid Extruded Polystyrene Insulation Board 1250mm x 600mm Pack of 5 (3.75m2)
80mm 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
£64.89£77.87 Ex VATInc VAT£17.30£20.76 Per M2 Add to cart -
80mm Kingspan Kooltherm K107 Pitched Roof Board 2400mm x 1200mm Pack of 4 (11.52m2)
80mm Kingspan Kooltherm K107 Pitched Roof Board is a premium performance insulation with a fibre-free rigid thermoset phenolic core. It is used to insulate pitched roofs and attic spaces, and has a thermal conductivity of just 0.019 W/m.K across all thicknesses.
£360.47£432.56 Ex VATInc VAT£31.29£37.55 Per M2 Add to cart -
80mm Kingspan Kooltherm K112 Framing Insulation Board 2400mm x 1200mm Pack of 4 (11.52m2)
80mm 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.
£451.02£541.22 Ex VATInc VAT£39.15£46.98 Per M2 Add to cart -
80mm Kingspan Thermaroof TR24 Flat Roof PIR Insulation Board 1200mm x 600mm Pack of 6 (4.32m2)
80mm Kingspan Thermaroof TR24 is a high performance insulation with a fibre-free rigid thermoset polyisocyanurate (PIR) core. Kingspan Thermaroof is suitable for flat roofs waterproofed with partially bonded torch applied multi-layer bituminous waterproofing.
£189.02£226.82 Ex VATInc VAT£43.75£52.50 Per M2 Add to cart -
80mm Kingspan Thermaroof TR26 PIR Insulation Board 2400mm x 1200mm (8′ x 4′) Pack of 4 (11.52m2)
80mm Kingspan TR26 Thermaroof is high-performance insulation that has a fiber-free rigid thermoset polyisocyanurate (PIR) core. Suitable for flat roof application waterproofed with mechanically fixed single-ply waterproofing.
£285.31£342.37 Ex VATInc VAT£24.77£29.72 Per M2 Add to cart -
80mm Kingspan Thermaroof TR27 PIR Insulation Board 1200mm x 1200mm Pack of 4 (5.76m2)
80mm Kingspan Thermaroof TR27 is a high performance insulation with a fibre-free rigid thermoset polyisocyanurate (PIR) core. It is used to insulate flat roofs waterproofed with fully adhered single-ply, partially bonded built-up felt, mastic asphalt and cold liquid applied waterproofing.
£157.95£189.54 Ex VATInc VAT£27.42£32.90 Per Sheet Add to cart -
80mm Recticel Eurothane GP PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
80mm 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.
£37.29£44.75 Ex VATInc VAT£12.95£15.54 Per M2 Add to cart -
80mm Recticel Eurowall Partial Cavity Wall Insulation Board 1200mm x 450mm Pack of 12 (6.48m2)
80mm Recticel Eurowall offers rigid great performance insulation boards designed for partial cavity walls. They lock in warmth and boost energy efficiency with ease.
£139.81£167.77 Ex VATInc VAT£21.58£25.90 Per M2 Add to cart -
80mm Unilin Safe-R SR/PR Pitched Roof Phenolic Insulation Board 2400mm x 1200mm (8′ x 4′) Pallet of 28 (80.64m2)
80mm 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.
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80mm Insulation
80mm insulation is a mid-range depth specified when you need solid thermal performance but have limited space. It sits neatly between thinner internal linings and deeper structural insulation systems, making it common in refurbishment work and controlled build-ups.
What is 80mm thick insulation?
80mm thick insulation means that, when installed, the material dimension from face to face is 80 millimetres.
At this depth, insulation works by trapping still air (in soft products) or slowing heat flow through dense foam (in rigid boards).
The 80mm insulation thickness provides a meaningful reduction in heat loss. But it is also thin enough to fit between many common studs, joists, and lining systems without interfering with services.
What is 80mm thick insulation used for?
Insulation 80mm thick is used where space is limited, but thermal performance is still required:
- Internal wall linings during refurb work
- Timber frame walls where the stud depth is fixed
- Warm roof build-ups above rafters, often as part of a layered insulation system
- Floors where the build-up height is restricted
- Acoustic upgrades that also require improved thermal performance
It is not the thickest option, but it is often the maximum practical thickness permitted by the construction detail.
Types of insulation 80mm
There are two broad families at this depth:
80mm soft insulation
Soft 80mm insulation can be mineral wool insulation or glass wool insulation. It is flexible, air-filled, and tolerant of minor dimensional variation. Best for stud walls, joists, and sound control. Typical thermal conductivity values range from 0.032–0.040 W/m.K, depending on product grade.
80mm hard insulation
Rigid insulation boards at 80mm thickness include PIR insulation, phenolic, EPS, and XPS insulation. These rely on dense foam and closed cells. They deliver higher thermal resistance per millimetre, with typical thermal conductivity values between 0.022–0.030 W/mK. However, they require accurate cutting and tight jointing.
Both types can help meet Part L requirements when properly specified and installed.
Insulation 80mm thickness benefits
Using insulation 80mm thickness offers clear advantages:
- Significant thermal improvement without excessive build-up depth
- Easier detailing around windows and services
- Reduced risk of cold bridging than thinner insulation layers, when detailing is correct
- Works well in upgrades, not just new builds
- Can deliver both thermal and acoustic value
Why choose our 80mm insulation?
At Insulation Wholesale, we supply insulation solutions matched to real construction details. We supply proven 80mm soft insulation and 80mm hard insulation options from trusted UK manufacturers, and our team understands where each is most suitable. If something will not suit your wall, floor, or roof, we will advise accordingly and recommend a more suitable alternative.
If you are working to tight dimensions but still want real thermal performance, 80mm insulation is a practical and effective choice. Browse our range online or speak with our technical team. We will help you get the thickness right before you order.
FAQ
Where to buy 80mm insulation?
You can buy 80mm insulation online from Insulation Wholesale. We stock multiple material types and popular thicknesses and offer competitive trade pricing. Our store is built around fast delivery, clear product info, and real support from people who know insulation beyond the datasheet.
How to cut 80mm insulation?
Soft products: Use a long insulation knife or saw, and cut slightly oversize so it friction-fits.
Rigid boards: Score deeply along a straight edge, then snap or saw for clean edges.
How good is 80mm insulation?
80mm insulation can deliver R-values of roughly 2.0-3.6 m²K/W, depending on the material. However, it must be installed properly to achieve this range of values. This represents a substantial reduction in heat loss relative to the thickness used. It will not replace thicker insulation, but it delivers strong performance relative to its thickness.
