ROOFMATE™ SL-A is the STYROFOAM™ Solutions for insulating inverted roofs. The boards are unaffected by the conditions encountered on flat roofs, including wide fluctuations in temperature and repeated freeze/thaw cycles.
ROOFMATE SL-A insulation is intended for use on heavyweight decks (e.g. reinforced concrete) with a ballast layer of gravel or concrete slabs. It can also be used in the ROOFMATE MinK system, a unique development from Dow Building Solutions which brings together ROOFMATE SL-A and a vapour-permeable separation layer, ROOFMATE MK.
The rainwater cooling effect (caused by rainwater flowing between the insulation and waterproofing membrane) requires an increase in insulation thickness in order to meet BS EN ISO 6946. However, this increase can be substantially reduced by using the ROOFMATE MinK system, which helps to minimise the heat loss due to rainwater cooling and therefore the amount of insulation required. Its rot resistance also makes it ideal for insulating green roofs. ROOFMATE LG-A - an insulation board with an integral 10mm thick mortar topping - is ideally suited for parapet/upstand insulation.
Further information on designing with ROOFMATE SL-A and ROOFMATE LG-A insulation can be found in our literature.
| ROOFMATE | |||||
| Properties | Standard | Unit | CE Code | SL-A |
LG-A (foam) |
| Thermal conductivity* | |||||
| ≤80mm | BS EN 12667 | W/mK | λD | 0.033 | 0.033 |
| 81-120mm | BS EN 12667 | W/mK | λD | 0.034 | 0.034 |
| >121mm | BS EN 12667 | W/mK | λD | 0.036 | 0.036 |
| Compressive strength at 10% or break (90 days) | BS EN 826 | kN/m2 | CS(10Y)i | 300 | 300 |
| Design load 2% max. deflection (50 years) | BS EN 1606 | kN/m2 | CC(2/1.5/50)σc | 130 | -- |
| Water vapour resistivity | BS EN 12086 | MNs/gm | – | 925 | 925 |
| Water vapour diffusion resistance factor | BS EN 12086 | m | MUi | 185 | 185 |
| Water absorption | |||||
| Total immersion | BS EN 12087 | % vol | WL(T)i | <0.4 | <0.4 |
| Diffusion | BS EN 12088 | % vol | WL(V)i | <3 | <3 |
| Freeze/thaw, after 300 cycles | BS EN 12091 | % vol | FTi | <1 | <1 |
| Dimensional stability | |||||
| 48 hrs at 70C/90%RH | BS EN 1604 | % | DS(TH) | <2 | <2 |
| 168 hrs at 40kPa/70C | BS EN 1605 | % | DLT(2)5 | <5 | <5 |
| Density (aim) | BS EN 1602 | kg/m3 | – | 38 | 38 |
| Dimensions | |||||
| Length | BS EN 822 | mm | – | 1250 | 1250 |
| Width | BS EN 822 | mm | – | 600 | 600 |
| Thickness | BS EN 823 | mm | Ti | 100, 120, 140, 160, 180**, 200** |
90***, 130***, 190*** |
| Fire classification – reaction to fire | BS EN 13164 BS EN 13501 |
– | Euroclass | E | E |
| Appearance | |||||
| Surface | skin | mortar topping | |||
| Edge profile | shiplap | tongue & groove | |||
| Application | Inverted roofs ballasted | Parapet/upstand | |||
The properties given aboveare typical (unless stated otherwise). Results of test are available from Dow.
* declared 90/90 value - BS EN 13164
** length 2500mm
*** includes 10mm for the mortar topping; thicknesses of 130mm and 190mm made to order by special arrangement.