125mm Kingspan TR26 Flat Roof Insulation Board

Discover the 125mm Kingspan Therma TR26, a high-performance PIR insulation board engineered for flat roof applications. This product delivers exceptional thermal performance and integrates seamlessly with mechanically-fixed, single-ply waterproofing systems and green roof installations. Suitable for both new construction and refurbishment projects, the TR26 offers straightforward installation and handling characteristics that support rapid building schedules and reliable roof insulation performance.

Product Specification

Brand: Kingspan®

Model: 125mm TR26 Thermaroof

Thickness: 125mm

Length: 2400mm

Width: 1200mm

Weight: 4.34kg/m2

Board Coverage: 2.88m2

Pack Coverage: Min quantity 1000m2

R-Value: 5.45 m2K/W

Thermal Conductivity: 0.022 W/mK

Dimensions: 2,400mm x 1,200mm x 125mm

Colour: Light Yellow | Silver

Compressive Strength: 150kPa

Vapour resistivity: 100

Density: 32kg/m3

Material: PIR Insulation Polyisocyanurate (rigid polyurethane foam PU)

Profile: Square edge

Finish: Low emissivity composite foil facings

Applications: Used for flat roofs waterproofed with mechanically fixed single-ply waterproofing.

BBA Certified: Yes

Features: Fully compatible with flat roof waterproofing and green roof systems

Key Features:

1. Superior thermal performance: The 125mm TR26 delivers outstanding thermal efficiency for flat roof applications, maximising energy conservation and reducing heat loss.
2. Mechanical fastening compatibility: Engineered for use with mechanically-fixed, single-ply waterproofing systems, this board accommodates diverse roofing specifications and installation methods.
3. FM Approval to FM 4470: This product carries FM Approval certification to FM 4470, demonstrating compliance with rigorous industry performance standards.
4. Simple installation and handling: The TR26 features straightforward installation characteristics and manageable handling properties, streamlining on-site work and reducing labour time.
5. Versatile project applications: Applicable to both new build construction and refurbishment schemes, this insulation solution addresses varied project requirements with consistent reliability.
6. Tapered system availability: Available as a tapered insulation system, enabling controlled roof slope creation for optimal drainage and water management.

Roof Waterproofing

The 125mm Kingspan Thermaroof TR26 performs effectively with most mechanically fixed single–ply waterproofing membranes.

Water Vapour Control

Installation Guidelines: New Build Roofs: When installing Kingspan Thermaroof® TR26 in new build roofs, it is recommended to use a separate vapour control layer unless it is being used in conjunction with a sealed metal deck. Additionally, a condensation risk analysis should be conducted for each project to ensure proper installation.

Refurbishment Projects with Existing Insulated Flat Roofs or Insulated Steel Faced Composite Panels: For refurbishment projects involving the addition of roof insulation to existing insulated flat roofs or roofs made of insulated steel faced composite panels, it is crucial to perform a U-value calculation and condensation risk analysis. These assessments are essential in determining the appropriate insulation thickness for achieving the required thermal performance while avoiding interstitial condensation.

Installation over Existing Bituminous Waterproofing Roof Membrane: In refurbishment projects where Kingspan Thermaroof® TR26 is being installed over an existing bituminous waterproofing membrane, the membrane can serve as a vapour control layer if it is in good water tight condition. However, if the membrane is not in good condition, a separate vapour control layer should be installed.

Minimum Requirements for Separate Vapour Control Layer: If a separate vapour control layer is needed, it should consist of a 1000 gauge (250 micron) polythene sheet. All joints should be lapped and sealed using double-sided self-adhesive tape to ensure proper performance.

Info

Browse our complete Kingspan range and refine selections by thickness or coverage using the left-hand filters. For technical advice on product suitability, project-specific requirements, or volume-based pricing, contact us via phone on +4402038839057, email sales@insulationbee, or Live Chat for competitive UK Insulation pricing.