Kingspan Thermawall TW55 140mm PIR Wall Insulation

140mm Thermawall TW55 provides high-performance thermal insulation for timber frame and steel frame walls. Featuring a thermal conductivity of 0.022 W/mK, this product delivers superior insulation performance. These 140mm insulation boards are straightforward to cut and fit, ensuring efficient installation. Available in multiple thicknesses to suit different project specifications.

Key benefits include excellent 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).

Properties

Brand: Kingspan

Thickness: 140mm

Length: 2400mm

Width: 1200mm

Weight: 1.84kg | TW55 has an approximate weight of 3.50 kg/m2 at a thickness of 140 mm.

Model: 140mm Thermapitch TW55

Dimensions: 2,400mm x 1,200mm x 140mm

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: 6.35 m2K/W

Size: 1200mm x 2400mm

Thermal Conductivity: 0.022 W/mk

Finish: 140mm 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, 140mm 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 140mm insulation product suits multiple installation methods: external sheathing on timber or steel frame walls, inter-stud insulation in timber frame construction, external masonry paired with timber frame, and ventilated cladding systems with timber frame backing.

Facing Details

During manufacturing, Kingspan 140mm PIR receives a low emissivity composite foil facing on both surfaces. This reflective layer enhances thermal resistance within unventilated cavities adjacent to the board.

Core Composition

140mm Kingspan Thermawall TW55 utilises Nilflam® technology, delivering a premium fiber-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

When tested to BS EN 826:2013 (Thermal insulating products for building applications. Determination of compression behavior), 140mm 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.

Lifespan

The service life of 140mm TW55 depends on correct installation, adequate structural support, and appropriate usage conditions. When properly installed, the product can provide long-term performance.

Fire Performance

140mm 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

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