Kingspan Thermapitch TP10 25mm Roof Insulation Board

The 25mm Thermapitch TP10 is a high-performance PIR insulation board engineered for pitched roofs with slate or tile coverings. Suitable for both new construction and retrofit applications, this product is available in multiple thicknesses. The 25mm insulation boards offer straightforward handling and cutting for efficient installation.

The 25mm Kingspan TP10 delivers excellent thermal efficiency for pitched roof and attic spaces, making it ideal for loft conversions and renovation work. It minimises heat loss through the roof structure, contributing to reduced energy consumption. The product resists sagging and complies with Robust Details requirements under Part E of the Building Regulations across England and Wales.

Properties

Brand: Kingspan

Thickness: 25mm

Length: 2400mm

Width: 1200mm

Model: 25mm Thermapitch TP10

Dimensions: 2,400mm x 1,200mm x 25mm

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: 1.1m2K/W

Size: 1200mm x 2400mm

Thermal Conductivity: 0.022 W/mk

Finish: 25mm TP10 is faced on both sides with a low emissivity composite foil, autohesively bonded to the insulation core during manufacture.

Applications: Tiled or Slated Pitched Warm Roof

Fire Resistance: Under System 4 AVCP, 25mm Thermapitch TP10 has a Euroclass rating of F.

Water vapour resistance: 100 MNs/g

BBA Certified: Yes, No. 14/5133

Features: Improves the Thermal Resistance

Application Options

1. Ideal for new builds or re-roofing projects, functioning as unventilated insulation positioned between and beneath rafters.
2. For loft insulation conversion schemes, recommended as ventilated insulation between and under rafters.
3. 25mm Kingspan Insulation works well as unventilated insulation between and over rafters in new construction or re-roofing applications.

The Facings

Throughout manufacture, Kingspan 25mm PIR receives a low emissivity composite foil layer on both surfaces, which acts as a reflective barrier to boost thermal performance in unventilated cavities adjacent to the board.

The Core

25mm Kingspan Thermapitch TP10 employs Nilflam® technology in its core, delivering premium fibre-free rigid thermoset polyisocyanurate (PIR) insulation. The production method utilises a blowing agent with zero Ozone Depletion Potential (ODP) and minimal Global Warming Potential (GWP).

Compressive Strength

Testing to BS EN 826:2013 (Thermal insulating products for building applications. Determination of compression behavior) confirms that 25mm Kingspan PIR insulation typically achieves compressive strength exceeding 140 kPa at 10% compression.

Water vapour 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.

Durability

The lifespan of 25mm TP10 depends on correct installation, adequate structural support, and appropriate usage conditions. When properly installed, the product can deliver an extended service life.

Fire performance

25mm Kingspan Insulation TP10 achieves an F Euroclass rating under System 4 AVCP. When integrated into pitched roof systems and positioned beneath appropriate roof coverings, it satisfies national requirements 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 volume discount quotation, contact us by phone on +4402038839057, email sales@insulationbee or use Live Chat - Lowest UK Insulation Prices.