Kingspan Thermawall TW55 PIR Insulation Board 120mm

120mm 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 thermal resistance. These 120mm insulation boards are straightforward to cut and install, ensuring quick and efficient application. Multiple thicknesses are available to suit different insulation needs.

Key benefits include excellent thermal efficiency for cavity wall insulation applications, compatibility with both timber and steel frame construction, and suitability for use between studs or as external sheathing. This makes it an ideal choice for Modern Methods of Construction (MMC).

Properties

Brand: Kingspan

Thickness: 120mm

Length: 2400mm

Width: 1200mm

Weight: 1.84kg | TW55 has an approximate weight of 3.50 kg/m2 at a thickness of 120 mm.

Model: 120mm Thermapitch TW55

Dimensions: 2,400mm x 1,200mm x 120mm

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: 5.45 m2K/W

Size: 1200mm x 2400mm

Thermal Conductivity: 0.022 W/mk

Finish: 120mm 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, 120mm 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 120mm insulation product works well in multiple installation scenarios. Use it as external sheathing on timber or steel frame walls, between studs in timber frame construction, with external masonry and timber frame systems, or beneath ventilated cladding on timber frame structures.

Facing Details

During manufacturing, Kingspan 120mm PIR receives a low emissivity composite foil facing on both sides. This reflective layer boosts thermal resistance in unventilated cavities adjacent to the board.

Core Composition

The core of 120mm Kingspan Thermawall TW55 uses Nilflam® technology, a premium fiber-free rigid thermoset polyisocyanurate (PIR) material. Manufacturing 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), 120mm Kingspan PIR insulation typically achieves compressive strength exceeding 140 kPa at 10% compression.

Water Vapour Resistance

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

Durability

The service life of 120mm TW55 depends on correct installation, adequate structural support, and appropriate usage conditions. When properly installed, it can offer a potentially unlimited lifespan.

Fire Performance

120mm 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 filter by thickness or coverage using the left-hand menu. For advice on product suitability for 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.