Technical Guide – What Type of Fascia?

Choose the right Fascia
 
9mm
16mm


Fascia Selection (9mm or 16mm)

9mm Fascia Board
9mm board should only be used for refurbishment and renovation when fixed on to existing sound timber. The 9mm board should not be fixed directly to a gable ladder. If existing timber is damp, rotten or if its condition is in any doubt, use the 16mm replacement fascia board range.

16mm Fascia Board
16mm board can be fixed directly onto gable ladder. The 16mm board is generally used in new built and 'rip-out' situations. It is generally regarded as a premium solution due to the boards superior strength and rigidity.

Fixing

  • Cut (or pack) rafter feet to a neat line.
  • Allow wood preserves to dry before fixing fascia.
  • Fix into sound substrate only.
  • Sarking felt should be replaced if damaged back to the first batten or a minimum of 300mm (use P89).
  • Roof tiles must not be solely supported by fascia.

Summary
Colour White White
Product Fascia Fascia
Thickness 9mm 16mm
Fixing Polytop stainless nail 50mm long, notched (1092) Polytop stainless nail 65mm long, notched (1093)
Number of fixings per location 2 2
Max. fixing centres (mm) 600 600
Support Plank or Batten

Rafters
Support Gap Continous 600
Min expansion gap between profiles (mm) 10 10


Fixing gutter brackets

  • Gutter brackets must not be solely supported by fascia.
  • For deeplas 9mm boards, localised support behind each gutter bracket is required.
  • For deeplas 16mm boards every third fixing must be into structural timber (as a minimum).
  • Use stainless steel fixing screws (minimum 9mm or 16mm - dependent on fascia choice) longer than recommended by the gutter manufacturer.

Jointing
  • Allow 10mm expansion between joints (16mm for forward fascia) and 5mm at each end (8mm for foiled fascia).
  • Nail corner trims to rafters.
  • For butt joints, fix appropriate trim to one fascia end and allow a 5mm expansion gap to the butting board. (8mm for foiled fascia).
  • Cover exposed ends with appropriate end caps - use solvent based adhesive.

Gable Box Ends

Box ends can be formed in a number of ways as single or jointed assemblies as dictated by site parameters.

  • Cut fascia, soffit and corner moulding to length.
  • Position and secure as normal.
  • From a wide board cut a box end to shape and size. Cut joints vertically where possible to minimise the risk of moisture ingress. Horizontal joints must be completely sealed.
  • Locate box end into corner moulding and fix into soffit/rafter using plastic headed nails.
  • Measure and cut box end return fromfascia board.
  • Fix using plastic headed screws (fabricate fixing framework if required).
  • Measure and cut bargeboard soffit.
  • Fit and seal.
  • Fit bargeboard in normal way. (same details as fascia fixing)
  • Glue end cap to box end.
  • Seal installation (and joints) with mastic.