Kingspan Thermawall TW55 150mm PIR Board

150mm Thermawall TW55 is a high-performance thermal solution engineered for timber frame and steel frame wall construction. Delivering a low thermal conductivity of 0.022 W/mK, this product provides superior insulation efficiency. The 150mm boards cut and fit easily, ensuring straightforward installation. Available in multiple thicknesses, they adapt to varied thermal requirements.

Key benefits include excellent thermal efficiency for cavity wall insulation applications, compatibility with both timber and steel frame systems, and versatility as inter-stud insulation or external sheathing—making it an excellent choice for Modern Methods of Construction (MMC).

Properties

Brand: Kingspan

Thickness: 150mm

Length: 2400mm

Width: 1200mm

Weight: 1.84kg | TW55 has an approximate weight of 3.50 kg/m2 at a thickness of 150 mm.

Model: 150mm Thermapitch TW55

Dimensions: 2,400mm x 1,200mm x 150mm

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: 6.80m2K/W

Size: 1200mm x 2400mm

Thermal Conductivity: 0.022 W/mk

Finish: 150mm 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, 150mm 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 150mm insulation product suits multiple installation methods: external sheathing on timber or steel frames, inter-stud insulation in timber frame walls, external masonry combined with timber frame, and ventilated cladding systems with timber frame construction.

Facing System

During manufacturing, Kingspan 150mm PIR receives a low emissivity composite foil bonded to both surfaces. This reflective layer boosts thermal resistance in unventilated cavities adjacent to the board.

Core Technology

The core of 150mm Kingspan Thermawall TW55 employs Nilflam® technology—a premium, fibre-free rigid thermoset polyisocyanurate (PIR) material. Manufacturing uses a blowing agent with zero Ozone Depletion Potential (ODP) and minimal Global Warming Potential (GWP).

Compression Performance

Tested to BS EN 826:2013 (Thermal insulating products for building applications. Determination of compression behavior), 150mm Kingspan PIR insulation typically achieves compressive strength exceeding 150 kPa at 10% compression.

Moisture Resistance

According to 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.

Long-term Performance

Product longevity depends on correct installation, adequate structural support, and appropriate usage conditions. When properly installed, it can deliver an extended service life.

Fire Rating

150mm Kingspan Insulation TW55 achieves an F Euroclass rating under System 4 AVCP. In pitched roof applications with suitable roof covering, it meets national external fire exposure requirements.

Info

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