Xtratherm Flat Roof Board FR-BG
Xtratherm FR-BG is faced with a fleece finished bitumen/glass facers and is suitable for use below partially bonded bitumen based built up roofing systems.
Note: FR-BG can also be used in mechanically fastened or loose laid ballasted bituminous roofing systems.
Xtratherm FR-BG is faced with a fleece finished bitumen/glass facers and is suitable for use below partially bonded bitumen based built up roofing systems.
Note: FR-BG can also be used in mechanically fastened or loose laid ballasted bituminous roofing systems.
- High Thermal Performance
- Compatible with most bituminous based roofing systems
- Fleece finished bitumen/glass fibre facings
TYPICAL PHYSICAL CHARACTERISTICS
| PROPERTY | UNITS |
|---|---|
| Density | 32 kg/m³ |
| Compressive Strength | >150 kPa @10% |
| Water Vapour Resistivity | >100MNs/gm |
| Thermal Conductivity | 0.025 - 0.027 W/mK |
| Service Temperature | -20°C +100°C |
SPANNING
| Xtratherm FR-BG insulation boards laid over metal decks should be in accordance with BS 4841:Part 3 | ||
|---|---|---|
| mm | TROUGH OPENING (mm) | |
| 25 | 75 | |
| 30 | >75 | 100 |
| 40 | >125 | 150 |
| 50 | >175 | 200 |
TYPICAL 'U' VALUES
| FR-BG Over Concrete Deck | |
|---|---|
| THICKNESS (mm) | U-Value (W/m²K) |
| 80 | 0.28 |
| 90 | 0.25 |
| 100 | 0.23 |
| 60+60 (120) | 0.19 |
| 60+80 (140) | 0.16 |
TOLERANCE
| DIMENSIONS | SIZE (mm) | TOLERANCE |
|---|---|---|
| Length | 1200 | +/- 5mm |
| Width | 600 | +/- 3mm |
| Thickness | 40, 50 | +/- 2mm |
| 60, 70 , 80-120 | +/- 3mm | |
| Diagonals | Do not differ more than | 0.3% |
XTRATHERM FR-BG SHEET SIZE
Other sizes are available subject to quantity and lead time.
Design Xtratherm FR-BG is suitable for use with most bitumen based water proofing systems including those using a BS747 type 3G perforated base layer. The roof should be laid in accordance with BS 8217: 2005 (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. Care must be taken to provide adequate falls i.e. 1 in 80 to rain water outlets
Roof Loading Xtratherm FR-BG 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 sitework is to be carried out.
Roof finish Built up roofing systems should be finished with a suitable reflective layer such as chippings.
Fire Performance Built-up roofs using Xtratherm XT/BG as part of a 3 layer system with mineral chippings on the cap sheet will attain an FAA rating when tested to BS476, Part 3: 1988 external fire exposure roof test.
See the Specification Clause
| DIMENSIONS | SIZE (mm) |
|---|---|
| Length | 1200 |
| Width | 600 |
| Thickness | 50 | 60 | 70 | 80 | 90 | 100 | 120 |
Design Xtratherm FR-BG is suitable for use with most bitumen based water proofing systems including those using a BS747 type 3G perforated base layer. The roof should be laid in accordance with BS 8217: 2005 (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. Care must be taken to provide adequate falls i.e. 1 in 80 to rain water outlets
Roof Loading Xtratherm FR-BG 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 sitework is to be carried out.
Roof finish Built up roofing systems should be finished with a suitable reflective layer such as chippings.
Fire Performance Built-up roofs using Xtratherm XT/BG as part of a 3 layer system with mineral chippings on the cap sheet will attain an FAA rating when tested to BS476, Part 3: 1988 external fire exposure roof test.
See the Specification Clause
Xtratherm FR-BG is faced with fleece finished bitumen/glass fibre facings and is suitable for use below most bitumin based partially bonded built up roofing systems.
INSTALLATION GUIDELINES
Flat Roof Insulation
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 BS8217:1994 when applying the vapour control layer. Carry the the VCL past the insulation and seal with the parapet wall.
Laying - Metal Deck On metal decks, Xtratherm FR-BG should be laid break bonded into hot bitumen (max temperature 240°C) mopped or poured over the vapour control layer. The board can also be mechanically fixed. Ensure all edges of the boards are supported.
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-BG should be laid into hot bitumen on the vapour control layer in a break bonded pattern. The boards can also be mechanically fixed.
Laying - Plywood Deck On plywood decks, Xtratherm FR-BG 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, fixing heads should be sealed with bitumen.
Fixing The specification for fixing of Xtratherm roof boards will vary with the location, roof height/width and topographical data, architectural specification should be consulted. Generally with 1200x600 boards, a minimum of 4 fixings are adequate, located between 50mm and 150mm from all edges, additional fixings may be placed along the centre line. Counter sunk washers, 5mm in diameter should be used with each fixing. However, BS6399 Part 2 1995 should always be consulted. In two layer systems, all layers should be fixed in accordance with the contained 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 BUR system.
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 BS8217:1994 when applying the vapour control layer. Carry the the VCL past the insulation and seal with the parapet wall.
Laying - Metal Deck On metal decks, Xtratherm FR-BG should be laid break bonded into hot bitumen (max temperature 240°C) mopped or poured over the vapour control layer. The board can also be mechanically fixed. Ensure all edges of the boards are supported.
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-BG should be laid into hot bitumen on the vapour control layer in a break bonded pattern. The boards can also be mechanically fixed.
Laying - Plywood Deck On plywood decks, Xtratherm FR-BG 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, fixing heads should be sealed with bitumen.
Fixing The specification for fixing of Xtratherm roof boards will vary with the location, roof height/width and topographical data, architectural specification should be consulted. Generally with 1200x600 boards, a minimum of 4 fixings are adequate, located between 50mm and 150mm from all edges, additional fixings may be placed along the centre line. Counter sunk washers, 5mm in diameter should be used with each fixing. However, BS6399 Part 2 1995 should always be consulted. In two layer systems, all layers should be fixed in accordance with the contained 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 BUR system.
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