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Dimond External Fascia

Dimond coated steel fascia systems are available in 147mm and 185mm high panel, roll formed in 0.55mm BMT zincalume with a prepainted finish only. Unpainted zincalume product, copper, stainless steel and aluminium are not available.

The outer edge of the soffit lining is retained at the bottom of the fascia in a rolled groove.

Key Features

147 Fascia

  • The 147mm small Fascia does not require a soffit retainer and is able to be installed on a 100mm set out which allows it to be interchanged with both the Taylor and Triline fascia systems. Available in the North Island

185 Fascia

  • This clip on/clip off system makes installation and removal easy and can be used with the Quad SI, Deep Quad and Classic 125 gutters. Extra strong design using 0.55mm prepainted steel. Available nationally.
  • Dimond have tested 185 fascia for snow load to ensure it does not detach from the fixing brackets under a sliding 1.5 kPa snow fall on a 15º roof slope. The panel stayed attached to the fixing brackets.
Scope of Use
  • Dimond Fascia 147 and 185 are coated steel fascia systems intended for use as fascia and barge boards to support gutter systems, covering roof truss ends and gable ends around the roof perimeter on timber trussed residential buildings. External gutters are then fixed directly to the fascia to allow collection and discharge of rainwater.
  • Suitable for use with longrun metal roofing, metal tiles or concrete tiled roofs. Reference should be made to Section Environments, to ensure the correct coated material on the fascia is chosen for the environment.
  • Dimond do not recommend fascia systems are used in very severe marine or geothermal environments as fascia is not available in plain aluminium, AR8, ARX, stainless steel or copper.
  • Typically 185 panel is used up the gable ends while 147 panel is used along the front.

Design Instructions

  • Rafter and barge bracket centres should be at 900mm centres maximum in low and medium wind areas.
  • In high wind areas brackets should be fixed at 600-700mm centres maximum.
  • In heavy snowfall areas, brackets and snow straps must be fixed at 450mm centres.
  • Level or sloping soffits up to 22.5º pitch can be used.
  • The recommended set out heights must be maintained to avoid birds and vermin entering the roof space.
  • Steel products should not come into contact with concrete and must avoid dissimilar metal contact.
Statement of Building Code Compliance
  • Test information available from Pacific Coilcoaters and BHP NZ Steel, and past history of fascia systems, indicate that provided the product use and maintenance is in line with the guidelines contained in the current literature referenced, Dimond Rainwater Disposal Systems can be expected to meet the performance criteria in Clause E2 of the New Zealand Building Code, for a period of not less than 5 years.
  • If the need arises to use Dimond Rainwater Disposal Systems outside the limitations and procedures given in this or other referenced literature, or, if any doubt exists on product handling or use, written approval for use must be obtained from Dimond, before the project commences.
  • For consenting it is important to check the correct pre-painted finish has been selected for the environment. Refer to Section of Manual.
In-Service History

Metal fascia systems have been used successfully on timber trussed residential buildings for the last 20 years.

Dimond Roofing & Cladding Technical Manual
Installation and Operation
Installation and Operation
Dimond Homeowners Brochure
Colour Range

Dimond Roofing are a manufacturer of steel roofing, cladding and rainwater products.

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