Kingspan Thermawall TW55 30mm PIR Board

30mm Thermawall TW55 provides high-performance thermal insulation for timber and steel frame wall construction. Featuring a thermal conductivity of 0.022 W/mK, this PIR board delivers excellent thermal resistance. The 30mm boards are straightforward to cut and fit, ensuring quick and efficient installation. Available in multiple thicknesses to suit various insulation needs.

Key benefits of this product include strong thermal efficiency for cavity wall insulation applications, compatibility with both timber and steel frame systems, and versatility as either inter-stud insulation or external sheathing, making it well-suited for Modern Methods of Construction (MMC).

Properties

Brand: Kingspan

Thickness: 30mm

Length: 2400mm

Width: 1200mm

Weight: 1.84kg | TW55 has an approximate weight of 3.50 kg/m2 at a thickness of 30 mm.

Model: 30mm Thermapitch TW55

Dimensions: 2,400mm x 1,200mm x 30mm

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: 1.35m2K/W

Size: 1200mm x 2400mm

Thermal Conductivity: 0.022 W/mk

Finish: 30mm 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, 30mm 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 30mm insulation product suits multiple installation methods, including external sheathing on timber or steel frames, inter-stud placement in timber frame walls, external masonry combined with timber frames, and ventilated cladding systems with timber frames.

Surface Facings

During manufacture, Kingspan 30mm PIR receives a low emissivity composite foil bonded to both faces, functioning as a reflective layer to boost thermal resistance in unventilated cavities adjacent to the board.

Insulation Core

The core of 30mm Kingspan Thermawall TW55 employs Nilflam® technology, delivering a premium fibre-free rigid thermoset polyisocyanurate (PIR) material. The manufacturing process utilises a blowing agent with zero Ozone Depletion Potential (ODP) and minimal Global Warming Potential (GWP).

Compression Performance

When assessed to BS EN 826:2013 (Thermal insulating products for building applications. Determination of compression behavior), 30mm Kingspan PIR insulation typically achieves compressive strength exceeding 140 kPa at 10% compression.

Moisture 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 in excess of 100 MNs/g.

Long-Term Performance

The service life of 30mm TW55 depends on correct installation, adequate structural support, and appropriate usage conditions. When properly installed, the product can deliver an extended operational lifespan.

Fire Safety

30mm Kingspan Insulation TW55 achieves an F Euroclass rating under System 4 AVCP. When installed in pitched roof applications beneath appropriate roof covering, it meets UK national standards for external fire exposure.

Info

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