Kingspan Thermawall TW55 100mm PIR Board

100mm Thermawall TW55 provides high-performance thermal insulation for timber and steel frame wall construction. Featuring a thermal conductivity of just 0.022 W/mK, this insulation board delivers excellent thermal resistance with an R-value of 4.50 m2K/W. The boards are lightweight and straightforward to cut, making installation quick and efficient. Available in multiple thicknesses, they suit a wide range of insulation applications.

Key benefits include superior thermal efficiency for cavity wall insulation, compatibility with both timber and steel frame systems, 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: 100mm

Length: 2400mm

Width: 1200mm

Weight: 1.84kg | TW55 has an approximate weight of 3.50 kg/m2 at a thickness of 100 mm.

Model: 100mm Thermapitch TW55

Dimensions: 2,400mm x 1,200mm x 100mm

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: 4.50 m2K/W

Size: 1200mm x 2400mm

Thermal Conductivity: 0.022 W/mk

Finish: 100mm 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, 100mm 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 100mm insulation board works effectively in multiple configurations, including external sheathing on timber or steel frame walls, inter-stud insulation within timber frame construction, external masonry paired with timber frame, and ventilated cladding systems with timber frame backing.

Facing System

The product incorporates a low emissivity composite foil bonded to both faces during manufacturing. This reflective facing enhances thermal resistance in unventilated cavities adjacent to the board, improving overall insulation performance.

Core Technology

The 100mm Kingspan Thermawall TW55 core utilises Nilflam® technology, a premium fibre-free rigid thermoset polyisocyanurate (PIR) material. The manufacturing process employs a blowing agent with zero Ozone Depletion Potential (ODP) and minimal Global Warming Potential (GWP).

Compressive Strength

When tested to BS EN 826:2013 (Thermal insulating products for building applications. Determination of compression behavior), 100mm 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), the product typically demonstrates water vapour resistance well above 100 MNs/g.

Durability

The service life of 100mm TW55 depends on correct installation, adequate structural support, and appropriate usage conditions. When properly installed, the product can deliver a potentially indefinite lifespan.

Fire Performance

100mm 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 requirements for external fire exposure.

Info

Explore our full Kingspan range and refine your selection by thickness or coverage using the filters on the left. For product suitability advice specific to your project or to request a quantity discount quotation, contact us by phone on +4402038839057, email sales@insulationbee, or use Live Chat - Lowest UK Insulation Prices.