80mm Kingspan Thermawall TW55 PIR Wall Insulation

80mm Thermawall TW55 provides high-performance thermal insulation for timber frame and steel frame wall systems. Featuring a thermal conductivity of 0.022 W/mK, this product delivers excellent energy efficiency. The 80mm boards are straightforward to cut and fit, ensuring quick and efficient installation. Available in multiple thicknesses, these boards suit a wide range of insulation needs.

Key benefits include superior thermal efficiency for cavity wall insulation applications, compatibility with both timber and steel frame constructions, and versatility for use between studs or as external sheathing. This makes it particularly suitable for Modern Methods of Construction (MMC).

Properties

Brand: Kingspan

Thickness: 80mm

Length: 2400mm

Width: 1200mm

Weight: 1.84kg | TW55 has an approximate weight of 3.50 kg/m2 at a thickness of 80 mm.

Model: 80mm Thermapitch TW55

Dimensions: 2,400mm x 1,200mm x 80mm

Compressive Strength: The compressive strength typically exceeds 140 kPa at 10% compression.

Density: 32 Kg/m3

Length: 2400mm

Material: Polyisocyanurate (Kingspan PIR Insulation)

R-Value: 3.60m2K/W

Size: 1200mm x 2400mm

Thermal Conductivity: 0.022 W/mk

Finish: 80mm TW55 is faced on both sides with a low emissivity composite foil, autohesively bonded to the insulation core during manufacture.

Applications: Insulation for timber and steel framing systems.

Fire Resistance: Under System 4 AVCP, 80mm Thermapitch TW55 has a Euroclass rating of F.

Water vapour resistance: 110 MNs/g

BBA Certified: Yes, No. 14/5133

Features: Improves the Thermal Resistance | Unaffected by air infiltration | Resistant to the passage of water vapour

Applications

The 80mm insulation can be installed as external sheathing on timber or steel frame walls, positioned between studs in timber frame construction, applied to external masonry with timber frame backing, or used beneath ventilated cladding systems on timber frames.

Facing Materials

During manufacturing, Kingspan 80mm PIR receives a low emissivity composite foil facing on both surfaces. This reflective layer enhances thermal resistance in unventilated cavities adjacent to the board.

Core Construction

The 80mm Kingspan Thermawall TW55 core utilises Nilflam® technology, a premium fibre-free rigid thermoset polyisocyanurate (PIR) material. Manufacturing employs a zero Ozone Depletion Potential (ODP) blowing agent with minimal Global Warming Potential (GWP).

Compressive Strength

When tested to BS EN 826:2013 (Thermal insulating products for building applications. Determination of compression behavior), 80mm Kingspan PIR insulation typically achieves compressive strength exceeding 140 kPa at 10% compression.

Water Vapour Resistance

Tested in accordance with BS EN 12086:2013 (Thermal insulating products for building applications. Determination of water vapor transmission properties), this product typically demonstrates water vapour resistance well above 100 MNs/g.

Durability

The lifespan of 80mm TW55 depends on correct installation, adequate structural support, and appropriate usage conditions. When properly installed, the product can deliver long-term performance.

Fire Performance

80mm Kingspan Insulation TW55 achieves an F Euroclass rating under System 4 AVCP. When used in pitched roof applications with suitable roof covering, it meets national standards for external fire exposure.

Info

Browse our full Kingspan range and filter by thickness or coverage using the left-hand menu. For product suitability advice or bulk quotations, contact us by phone on +4402038839057, email sales@insulationbee, or use our Live Chat service for the best UK insulation prices.