50mm Unilin Xtroliner XO/SK Warm Roof Board

The 50mm Unilin Xtroliner XO/SK Warm Roof Board (Tongue & Groove) is a thoughtfully engineered external roof insulation solution with robust facings that lock together securely. It delivers an impressive passive U-value of 0.15 W/m²K. Choosing 50mm XO/SK roof insulation brings noticeable improvements to building details, faster fitting, and a level surface for precise finishing work.

A warm roof design cuts down the number of thermal bridging weak points, which means your roof performs better overall. The product carries a Euroclass C Fire Insulation Classification.

Product Details

Brand: Unilin®

Model: 50mm Xtroliner XO/SK T&G Warm Roof

Thickness: 50mm

Dimensions: 2,400mm x 1,200mm x 50mm

Width: 1200mm

Length: 2400mm

Pack Quantity: 6 sheets

Pack Coverage: 17.28m2

Material: PIR Insulation (polyisocyanurate)

Profile: Tongue and Groove

R-Value: 2.35m2K/W

Thermal Conductivity: 0.021W/mK

Compressive Strength: >150 (kPa)

Type: Superior performance PIR for Warm Roof Construction

Fire Classification: Euroclass C-s2, d0

Finish: Robust Textured Foil

Shipping method: Articulated Vehicle ǀ Courier

Application: Pitched Roof Sarking

BBA Certified: Yes (no. 12/4956)

Vapour Control Layer: Incorporated

Inner facing: Foil Facing

Outer facing: Foil Facing

Features: Reduced Thermal Bridging

Key Points

1. Robust Tongue & Groove Jointing
2. Reduced Risk of Condensation
3. Avoids Intrusion into Living Area
4. Excellent U-value in roofs
5. Reduced Thermal Bridging

What constitutes Thermal Bridging?

Thermal Bridging occurs in specific areas where the insulation level drops noticeably compared to the rest of the structure. These situations fall into 'Repeating,' 'Random,' or 'Non-Repeating' categories.

How is Thermal Bridging Quantified?

Thermal bridges are measured using linear thermal transmittance, shown as PSI (Ψ) and measured in W/mK. The SAP software programme calculates a building's energy performance rating and includes thermal bridging assessment at junctions, displayed as a 'Y-Value.'

Good detailing delivers benefits

1. Less chance of condensation and mould forming at poorly detailed junctions.
2. More energy efficient building with lower running costs.
3. A more cost effective method of achieving a low energy building.

Guidelines for Handling, Cutting, and Storage

1. Store Unilin 50mm PIR insulation board on a clean, level surface away from the ground in a sheltered location.
2. Polythene wrapping alone won't protect the boards from outdoor weather.
3. Protect the insulation during storage and on site throughout the build.
4. Always wear appropriate Personal Protective Equipment (PPE) when handling insulation products.

Info

Browse our Unilin stock and use the left-hand filters to narrow down by thickness or coverage area. For advice on product suitability for your project or to request a quantity discount, contact us on +4402038839057, email sales@insulationbee, or use Live Chat for competitive UK insulation board pricing.