Tricore® on Hawkes Bay Sports Park

A Tricore® case study

For Hawke’s Bay’s new sports and recreational hub, Tricore® provided a three-in-one roofing solution – assisting with weather tightness, insulation and noise control. Together with an ability to support a fast close-in, allowing work on the stadium’s interior to progress at pace.

Next-generation roofing for a next-generation sports park

Sports Park Hawke’s Bay is the realisation of Hastings District Council’s dream of a multi-use recreational hub to benefit the entire Hawke’s Bay region. It represents a $25m investment in the wellbeing and happiness of the local population. The development includes conference and meetings rooms, and an indoor arena, which is under Dimond® Tricore® roof, an advanced insulation roof system that is as long-term as the park itself.

Tane Pratt of Pacific Environments, the architect for the project, believes the choice of Tricore® helped construction teams to meet their deadlines and stay within budget.

“With Tricore®, the first layer that goes on allowed us to effectively waterproof the entire building very quickly, which allowed work to progress on other aspects of construction, including interior work, cabling and lighting. This created a huge time advantage on-site - potentially a couple of months was saved across the project.”

A New Zealand product that extends the life of an insulated roof

Tricore® was designed for New Zealand conditions, including weather extremes. It also solves a problem that is unique to insulated roofing systems – accumulation of condensation that affects the long-term durability of materials. In any insulated roof system, when warm air migrates through to the insulation layer, it eventually reaches a cooler surface that causes the moisture in the air to condense. Accumulation of this condensation reduces the effectiveness of the insulation and impacts the durability of the roof. The Dimond® Roofing Tricore® system includes a high-quality roof underlay positioned on top of the insulation with sealed laps that permit the transfer of water vapour, but prevents condensation moisture from passing through to the insulation below. The system also includes a galvanised roof rail that’s positioned above the insulation board and roof underlay to create an air space immediately below the metal roof sheet.

When condensation forms on the underside of the roof sheet (or in extreme cases possibly on the top surface of the underlay), it’s directly exposed to air movement in the air space and will dry out rather than accumulate.

With the Tricore® system there is the ability to choose any of Dimond's range of roofing profiles as the top sheet. In the Hawke’s Bay case, DD630 was chosen, which is a clip fixed system Tane Pratt explains: “The Dimond clip system allowed us to employ very long run sheets of the exterior profile – over 50 metres in length at a time. Also, the clip system means no penetration through to the cladding itself, which is great for long term durability.”

Tricore® explained

  • A base layer of MPN 900 forms the working platform for other layers. Once it’s installed, the area beneath is weatherproof.
  • The insulation layer is MFP PIR board, a highly efficient thermal insulation and acoustic performance material that delivers consistent R values and can reduce noise levels within the building.
  • Solitex Mento 1000 is the underlay layer. It’s a non-wicking building paper that allows vapour to permeate to the cold side of the roof.
  • A slotted roof rail system provides ventilation that allows moisture to evaporate.
  • The exterior surface can be any roofing profile from the Dimond® range. The life cycle of the roof can be extended by replacing only this top profile, not the entire system.