United Kingdom

Mastic asphalt roofing 120/125
Reinforced bitumen membrane roof coverings
Single layer polymeric roof coverings
440 Extruded polystyrene (XPS) inverted roof insulation
810 Inverted roof insulation 
820/840 Ballast layers

• Manufacturer and reference:
  Dow Chemical Company Limited
  Dow Building Solutions
  Diamond House, Lotus Park
  Kingsbury Crescent, Staines, TW18 3AG
  Tel: 020 3139 4000 - Fax :020 3139 4013
  For literature tel: 020 3139 4190
  
  ROOFMATE SL-X
  Thickness†:  80/100/120/140/160/180/190* and 200*mm 
  †delete as appropriate
  Board size: 1250 x 600mm, * 2500 x 600mm
  Edge profile: shiplap
  Design loading: 110kN/m2
  Fire Classification: Reaction to fire: BS EN 13164 Euroclass E
  Working temperature range: -50°C to +75°C. 
  
  

  ROOFMATE SL-A
  Thickness†: 100, 140, 160, 180 mm 
  †delete as appropriate
  Board size: 1250 x 600 mm
  Edge profile: butt edge
  Design loading: 130kN/m2
  Fire Classification: Reaction to fire: BS EN 13164 Euroclass E
  Working temperature range: -50°C to +75°C.

• do not lay insulation until roof is clear of other subtrades.
• clean off all dirt and debris from base.
• lay separation layer as required.
• set out to minimise cutting and avoid small cut pieces at perimeters and penetrations.››› loose lay boards, tightly butted and to brick pattern, cut cleanly to fit closely around projections, upstands, rainwater outlets, etc.
• on completion of laying ensure boards are in good condition, with no springing, flexing or rocking.  Secure boards against wind uplift as soon as practicable.
• lay ROOFMATE MK or suitable separating layer.

Specify ballast layers with clauses 820 and 840.