110mm Kingspan Thermawall TW55 PIR Board

110mm Thermawall TW55 provides high-performance thermal insulation for timber frame and steel frame wall applications. Featuring a thermal conductivity of 0.022 W/mK, this product delivers excellent thermal resistance. The 110mm boards are straightforward to install, with easy cutting and positioning. Multiple thicknesses are available to suit different insulation specifications.

Key benefits include high thermal efficiency for cavity wall insulation applications, compatibility with both timber and steel frame construction, and versatility as either inter-stud insulation or external sheathing. This makes it particularly suitable for Modern Methods of Construction (MMC) projects.

Properties

Brand: Kingspan

Thickness: 110mm

Length: 2400mm

Width: 1200mm

Weight: 1.84kg | TW55 has an approximate weight of 3.50 kg/m2 at a thickness of 110 mm.

Model: 110mm Thermapitch TW55

Dimensions: 2,400mm x 1,200mm x 110mm

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: 5 m2K/W

Size: 1200mm x 2400mm

Thermal Conductivity: 0.022 W/mk

Finish: 110mm 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, 110mm 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 110mm insulation product suits multiple installation methods. Use it as external sheathing on timber or steel frame walls, position between studs in timber frame construction, combine with external masonry over timber frames, or install beneath ventilated cladding systems. Each application method maximises thermal performance whilst maintaining structural integrity.

The Facings

The manufacturing process bonds a low emissivity composite foil to both faces of Kingspan 110mm PIR boards. This reflective facing enhances thermal resistance within unventilated cavities adjacent to the board surface.

The Core

110mm Kingspan Thermawall TW55 utilises Nilflam® technology, delivering a fibre-free rigid thermoset polyisocyanurate (PIR) core. The manufacturing process employs a blowing agent with zero Ozone Depletion Potential (ODP) and minimal Global Warming Potential (GWP).

Compressive Strength

Testing to BS EN 826:2013 (Thermal insulating products for building applications. Determination of compression behavior) confirms that 110mm Kingspan PIR insulation typically achieves compressive strength exceeding 140 kPa at 10% compression.

Water vapour resistance

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

Product longevity depends on correct installation, adequate structural support, and appropriate usage conditions. When properly installed, the material can achieve an indefinite service life.

Fire performance

110mm Kingspan Insulation TW55 achieves an F Euroclass rating under System 4 AVCP. When installed in pitched roof applications beneath suitable roof coverings, it meets national requirements for external fire exposure.

Info

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