TR/BGM
Suitable for use in high rise buildings
Improved acoustic performance
Robust high density
Thin-R
TR/BGM
Tapered Roof BGM is a high performance Polyisocyanurate tapered roof insulation with a polypropylene fleece finished bitumen/glass fibre working surface and a mineral glass facing to the under side. (These boards are not reversible) They are suitable for use below most bitumen based partially bonded built up roofing systems. This product is part of Unilin’s comprehensive range of high performance tapered roof boards providing total solutions for tapered roof projects.
Roof Design
The BGM boards are suitable for use with most bitumen based water proofing systems including those using a BS EN 13707: 2013 (Flexible sheets for waterproofing. Reinforced bitumen sheets for roof waterproofing) type 3G perforated base layer. The roof should be laid in accordance with BS 8217 (Reinforced bitumen membranes for roofing. Code of practice). During the construction process, the construction should be protected from rain penetration during breaks in the process.
Falls
The fall on a flat roof should be designed to ensure that rainfall does not pond. These boards provide a practical solution to Water Ponding with insulation and drainage in a single system.
Fire Performance
The fire rating, when tested to TS 1187 and classified to EN 13501-5, will be dependent upon the waterproofing system specified.
Laying (Timber Deck)
On plywood decks, Unilin TR/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 glassfibre facer (MG) can be adhered with other suitable adhesive. Fixing heads should be sealed with bitumen.
Laying (Metal Deck)
On metal decks, Unilin TR/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 glassfibre facer (MG) can be adhered with other suitable adhesive. Fixing heads should be sealed with bitumen.
Specification Clause
The flat roof insulation shall be Unilin Insulation Thin-R TR-BGM _ _ _mm thick manufactured to EN 13165 by Unilin Insulation Comprising a rigid Polyisocyanurate (PIR) core between fleece finished bitumen/glass fibre facings with a Agrément declared Lambda value as low as 0.024 W/mK. The flat roof insulation shall be installed in accordance with instructions issued by Unilin Insulation.
Refer to NBS clause J42 420, J42 10.
Vapour Control Layer (VCL)
Decks should be primed before the application of the hot bitumen used to bond the vapour control layer. Reference should be made to BS8217 when applying the vapour control layer. Carry the VCL past the insulation and seal with the parapet wall. Torch on VCL’s also available.
Roof Finish
Built up roofing systems should be finished with a suitable reflective layer such as chippings. Advice should be sought from system manufacturer.
Loadings
These boards are 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 sitework is to be carried out.
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