Unilin FR/BGM Flat Roof Insulation Boards are a high-performance PIR insulation solution designed for use with a wide range of flat roofing applications, including bituminous roofing systems, fully adhered single ply membranes, and liquid applied waterproofing systems.

Each board features a dual-faced construction, making it a truly versatile insulation option for both new build and refurbishment projects. The black polypropylene fleece finished bitumen/glass fibre surface is designed for compatibility with bitumen-based roofing systems, whilst the beige mineral glass tissue facing is suitable for adhesive bonded single ply membranes and liquid roofing applications.

Manufactured to provide excellent thermal performance, Unilin FR/BGM helps achieve demanding building regulation requirements whilst reducing heat loss through flat roof structures. Suitable for installation over timber, metal and concrete decks, these insulation boards can be mechanically fixed, adhered, or installed using hot bitumen depending on the roofing specification.

Available in a range of thicknesses from 25mm to 160mm, all boards measure 1200mm x 1200mm and are supplied in pack quantities only.

Key Features & Benefits

• Universal flat roof insulation board for multiple roofing systems.
• Suitable for bitumen, single ply and liquid applied roofing membranes.
• Dual-faced board with dedicated surfaces for different applications.
• Excellent thermal conductivity from 0.024 to 0.027 W/mK.
• High compressive strength of 150kPa at 10% compression.
• Compatible with timber, metal and concrete roof decks.
• Suitable for new build and refurbishment projects.
• Lightweight and easy to handle on site.
• Helps achieve low U-values and Building Regulation requirements.
• Environmental Product Declaration (EPD) available.
• Supplied in manufacturer pack quantities.

Applications

• Unilin FR/BGM insulation boards are suitable for use with:
• Torch-on felt roofing systems.
• Built-up bituminous roofing systems.
• Fully bonded single ply membranes.
• Liquid applied roofing systems.
• Warm roof constructions.
• New build flat roofs.
• Refurbishment and overlay projects.

Board Size

• Length: 1200mm.
• Width: 1200mm.

Available Thicknesses

• 25mm.
• 50mm.
• 60mm.
• 70mm.
• 80mm.
• 90mm.
• 100mm.
• 110mm.
• 120mm.
• 130mm.
• 140mm.
• 150mm.
• 160mm.

Technical Information

• Core Material: PIR (Polyisocyanurate).
• Thermal Conductivity: 0.024 – 0.027 W/mK.
• Compressive Strength: 150kPa @ 10% Compression.
• Reaction to Fire: Euroclass F.

Typical U-Value Performance

Roof Construction      Insulation Thickness       U-Value

Concrete Deck             150mm                               0.15 W/m²K.

Metal Deck                  160mm                               0.15 W/m²K.

Timber Deck                150mm                               0.15 W/m²K.

Concrete Deck             125mm                               0.18 W/m²K.

Metal Deck                  130mm                               0.18 W/m²K.

Timber Deck                120mm                               0.18 W/m²K.

Concrete Deck             120mm                               0.19 W/m²K.

Metal Deck                   120mm                              0.20 W/m²K.

Timber Deck                 110mm                             0.19 W/m²K.

Installation Guidance

Unilin FR/BGM boards may be installed on timber, metal or concrete roof decks using mechanical fixings, approved adhesives, or hot bitumen depending on the roof specification. For bituminous roofing systems, the fleece finished surface should face upwards. For single ply and liquid roofing applications, the mineral glass tissue surface should be used as the bonding surface.

All roofing works should be completed in accordance with current British Standards, manufacturer recommendations and site-specific project requirements.

Important Information

• Sold in pack quantities only.
• Protect insulation boards from moisture during storage and installation.
• Suitable for limited maintenance foot traffic only.
• Walkways should be installed where regular roof access is required.
• Roofing system compatibility should always be confirmed with the waterproofing manufacturer before installation.

Bulk Discounts & Stock Availability

Looking for larger quantities or found this product showing as out of stock?

Please contact us with your project details, as we may be able to offer discounted rates on larger orders. Our stock levels and supplier availability change regularly and may not always be reflected on the website in real time.

Get in touch with our team today and we'll be happy to check current availability, lead times, and provide a competitive quotation for your project.