Phenolic Insulation

Phenolic insulation boards provide excellent thermal efficiency in a slim profile. These compact foam sheets are the natural choice for projects where space and fire protection are a concern. 

What Is Phenolic Insulation Board? 

Phenolic insulation boards are engineered from closed-cell phenolic foam and finished with aluminium foil or glass tissue backing. They are distinguished by their compact cell make-up and strong resistance to fire.

These boards enable builders to achieve specified U-values with thin insulation sheets. Leading products such as Kingspan phenolic insulation consistently perform well across a range of building applications.  

What Is Phenol Insulation Used For? 

These boards are commonly specified for: 

• Pitched and flat roofs – Ideal where reduced thickness is key.  
• External and cavity walls – To meet modern energy targets.  
• Floor insulation – Including solid concrete or suspended timber floors. 
• Ceilings and soffits – For their lightweight thermal protection. 
• Commercial and industrial structures that demand reliable fire resistance and consistent temperature control.
• Refurbishments and new builds, especially where available space is limited.

Types Of Phenolic Insulation Sheets 

You can choose from different formats, including: 

• Foil-faced boards – Best for roofs and walls that need superior vapour control. 
• Glass-tissue-faced sheets – Best used under render or plaster finishes. 
• Composite phenolic panels – Made from phenolic foam and other insulating materials. Suited for high-strength applications. 

Benefits Of Phenol Insulation 

Installing phenolic insulation provides numerous advantages: 

• Slim profile for more usable space. 
• Outstanding thermal performance within a compact thickness. 
• Excellent resistance to damp and water vapour ingress. 
• Easy to work with thanks to its lightweight, manageable form. 
• Helps reduce heating costs and carbon output. 
• Durable and dimensionally stable over time. 
• Compatible with a wide variety of substrates and systems. 

Why Choose Our Phenolic Foam Sheet? 

Here’s why professionals trust Insulation Wholesale for phenolic insulation panels: 

• We stock top-quality insulation brands in a range of thicknesses and sizes. 
• Products tested and certified to relevant BS and EN standards. 
• Expert technical guidance.  
• Competitive pricing with trade discounts and bulk-order options. 
• Prompt UK-wide service, with next-day delivery available. 

Upgrade your project’s energy performance with phenolic insulation boards. Choose from Kingspan and other trusted brands, with fast delivery anywhere in the UK. 

FAQ

What is phenolic insulation? 

This is a foam insulation board that provides strong heat retention while keeping overall thickness to a minimum. It is commonly fitted in roof, wall and floor systems to meet high regulatory standards. 

What is phenolic insulation made of? 

It is created from a phenol resin that solidifies into a dense, closed-cell structure. The board is usually coated with glass tissue or foil for improved durability.

What is phenolic insulation used for? 

It is used for interior surfaces that require top-tier insulation and fire protection without increasing the build thickness, typically for floor and roof systems, walls, and soffits. It’s installed to help fulfil energy and fire safety standards. 

Where to buy phenol insulation?

Buy phenolic insulation boards directly from Insulation Wholesale. We offer reliable UK delivery and trade discounts on all phenolic insulation boards.