Kingspan Thermawall TW55 PIR Wall Insulation 60mm

60mm Thermawall TW55 provides high-performance thermal insulation for timber frame and steel frame wall systems. Delivering a thermal conductivity of 0.022 W/mK, this rigid PIR board offers exceptional thermal resistance. The boards are straightforward to cut and position, ensuring efficient installation on site. Available in multiple thicknesses, this product suits a range of insulation specifications.

Key benefits include superior thermal efficiency comparable to leading cavity wall insulation products, compatibility with both timber and steel frame construction, and versatile positioning between studs or as external sheathing. This makes it particularly suitable for Modern Methods of Construction (MMC) applications.

Properties

Brand: Kingspan

Thickness: 60mm

Length: 2400mm

Width: 1200mm

Weight: 1.84kg | TW55 has an approximate weight of 3.50 kg/m2 at a thickness of 60 mm.

Model: 60mm Thermapitch TW55

Dimensions: 2,400mm x 1,200mm x 60mm

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: 2.70m2K/W

Size: 1200mm x 2400mm

Thermal Conductivity: 0.022 W/mk

Finish: 60mm 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, 60mm 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

This 60mm insulation board works effectively in multiple installation scenarios. Use it as external sheathing on timber or steel frame construction, position between wall studs in timber frame assemblies, combine with external masonry over timber frames, or install beneath ventilated cladding systems. Each application method maximises thermal performance and air-tightness.

Facing Details

Manufactured with a low emissivity composite foil bonded to both surfaces, Kingspan 60mm PIR creates a reflective barrier that enhances thermal resistance in unventilated cavities adjacent to the board.

Core Composition

The core of 60mm Kingspan Thermawall TW55 employs Nilflam® technology, delivering a fibre-free rigid thermoset polyisocyanurate (PIR) insulation material. The manufacturing process utilises a zero Ozone Depletion Potential (ODP) blowing agent with minimal Global Warming Potential (GWP).

Compression Performance

When assessed under BS EN 826:2013 (Thermal insulating products for building applications. Determination of compression behavior), 60mm Kingspan PIR insulation typically achieves compressive strength exceeding 140 kPa at 10% compression.

Vapour Resistance

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

Service Life

Longevity depends on correct installation, adequate structural support, and appropriate usage conditions. When installed properly, the product can deliver an extended service life.

Fire Rating

60mm Kingspan Insulation TW55 achieves an F Euroclass rating under System 4 AVCP. When installed in pitched roof applications beneath appropriate roof coverings, it meets national standards for external fire exposure.

Info

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