Xtratherm FR/BGM Flat Roof Insulation Board 

40mm Thick x 1200mm x 600mm - 12 Boards Per Pack/8.64m2.

Bituminous and Fully Adhered Single Ply Membrane Compatible

* Priced Per Pack Quantity - Only Supplied in Pack Quantities. *

​FR/BGM is faced with a polypropylene fleece finished bitumen glass working surface and a mineral glass facing to the under side. FR/BGM is part of Xtratherm’s comprehensive range of high performance flat roof boards providing total solutions for flat roof projects.

The dark surface is suitable for Bituminous Waterproofing Systems and lighter beige surface is suitable for fully adhered single ply membranes.

Roof Loading:  Xtratherm FR/BGM is suitable for use on roof decks that are subject to limited maintenance foot traffic. Walkways should be provided on roofs requiring regular pedestrian access. When the roof is complete, protective boarding should be laid if additional site work is to be carried out.

Roof Finish: Built up roofing systems should be finished with a suitable reflective layer such as chippings. Advice should be sought from system manufacturer.

Fire Performance: The fire rating when tested to EN 13501-5 and BS 476 Part 3 ‘External Fire Exposure Roof Test’ will be dependent upon waterproofing system specified.

Vapour Control Layer: Decks should be primed before the application of the hot bitumen used to bond the vapour control layer. Reference should be made to BS 8217:1994 when applying the vapour control layer. Carry the VCL past the insulation and seal with the parapet wall.

Laying (Metal Deck): On metal decks, Xtratherm FR/BGM should be laid break bonded into hot bitumen (max temperature 240°C) mopped or poured over the vapour control layer. The boards can also be mechanically fixed or the mineral coated glass fibre face (MG) can be adhered with other suitable adhesive. Fixing heads should be sealed with bitumen.

Laying (Concrete Deck): Ensure concrete decks are laid to provide correct falls to outlets and are clean, dry, without projections. Primer should be laid in accordance with the manufacturer’s instructions. The vapour control layer should be fully bonded to the deck and the Xtratherm FR/ BGM should be laid into hot bitumen on the vapour control layer in a break bonded pattern. The boards can also be mechanically fixed or the mineral coated glass fibre face (MG) can be adhered with other suitable adhesive. Fixing heads should be sealed with bitumen.

Laying (Timber Deck): On plywood decks, Xtratherm FR/BGM should be fully bedded in hot bitumen over a continuous vapour control layer which has been nailed or bonded to the deck. The boards can also be mechanically fixed or the mineral coated glass fibre face (MG) can be adhered with other suitable adhesive. Fixing heads should be sealed with bitumen. 

Fixing: The specification for fixing Xtratherm roof boards will vary with the location, roof height/width and topographical data. Architectural specification should be consulted. Generally with 1200mm x 600mm boards, a minimum of 4 fixings per board are adequate, located between 50mm and 150mm from all edges, additional fixings may be placed along the centre line. Counter sunk washers, 50mm in diameter should be used with each fixing. However, BS 6399: Part 2 should always be consulted. In two layer systems, all layers should be fixed in accordance with fixing manufacturers instructions.

Bitumen Based Built Up Roofing Systems: Technical guidance from the appropriate bitumen waterproofing manufacturer should be sought as to assure proper installation of the bonded built up roofing system.

Fire: Each contract should be assessed for suitability of torch on applications. The suitability of materials, substrates and specifications should be assessed before commencement. Application of the torch on system should be undertaken only by fully trained personnel with appropriate fire precautions and fire extinguishing equipment available at hand. All timber roof components, and most insulation materials are combustible, and will be vulnerable to a naked flame. These materials may be hidden from view. Due attention should be given and all precautions taken. This is the responsibility of the operatives.

Typical U-Values

Brochure

BBA Certificate

Flat Roofing Guide

*** This Board Type is a Standard Stock Item at our Yard, but not all thicknesses ***

There are difficulties in obtaining this product currently. stock is changing on a daily basis and we always try to reflect this in the stock shown as available here. Sometimes there are some differences. We will confirm availability shortly after your order is placed or you can contact us to discuss this. 

If you require a large amount then please do get in touch as we can supply you with a quotation for a manufacturer direct to site delivery option and further discounts could be applicable.

If you order Stocked and Non-stocked products at the same time this will lead to the non-stocked items having to be delivered into our yard prior to us getting them out to you or you are collecting them from us. The non-stock items have a quicker and cheaper delivery option which is to be delivered direct by the manufacturer. This option may not be available to you if you mix the two products type in your shopping basket. So, you may have to make two separate purchases to get the best delivery times and costs.

We are constantly updating our items and delivery options and so we aim to provide a more seamless approach very soon