Oberlanders made the shortlist at last yearsAYAs, as the practice was named a finalist forOne Off Small Project of the Year.In this series,we take a look at the teams entry project and ask the firms partner, Catriona Hill, and lead delivery architect, Catriona Kinghorn, to break down some of the biggest specification challenges that needed to be overcome.Source: Gordon Burniston and Ewan WetherspoonCorrieshalloch Gorge is a designated National Nature Reserve situated on a remote, sloped wilderness site twenty minutes from Ullapool in ScotlandWhat were the key requirements of the clients brief? How did you meet these both through design and specification?The National Trust for Scotlands new Gateway to Nature at Corrieshalloch Gorge provides essential facilities for visitors who have travelled a considerable distance.Set in a remote and rural landscape, Corrieshalloch Gorge Reserve previously had no utility connections and no facilities to serve its visitors or the staff who worked there. The key requirements of the clients brief were to discretely introduce new services with minimal impact on the landscape setting.This requirement was met through the careful positioning of the new centre and the specification of appropriate materials such as the larch used to clad the building and the landscape installations positioned along the new pathway.Source: Gordon Burniston and Ewan WetherspoonOberlanders was appointed to help the National Trust for Scotland realise their ambitions for a sensitively designed visitor centre to enhance the experience of visitors to the GorgeWhat were the biggest specification challenges on the project and how were these overcome?One of the biggest challenges was the specification of the larch cladding. Whilst the team was keen to use locally grown larch, the growing conditions in Scotland impacted the density of the larch, making it less suitable for use as a cladding material than European or Siberian larch.The preference has typically been for Siberian larch, which is denser and more durable. However, recent issues in Russia have affected the supply chain, making it impossible to procure. The contractor and architect worked hard with the supplier to source available Siberian larch and modify cladding board lengths to enable this to be used around the perimeter of the main building.To ensure even weathering a SIOO finish was specified which enables the larch to silver consistently regardless of whether the board is protected or exposed. The outcome is an evenly finished surface across the building, which will age and mature consistently over time.Source: Gordon Burniston and Ewan WetherspoonThe centre provides a place for arrival, orientation and interpretation before a visit to the gorge which runs through the NTS nature reserveWhat are the three biggest specification considerations for the project type? How did these specifically apply to your project?The key specification considerations were the robustness to exposed weather conditions, ease of procurement and cost. The order varied depending on the product.The National Trust for Scotland was keen to ensure that durability in the exposed landscape setting was considered in the selection of each product, alongside the use of natural materials suitable for the landscape setting. This applied to both the building and the landscape specification.The architect and landscape architect worked closely to ensure the hard surfacing and architectural finishes were compatible. Ease of procurement, which in this case extends to ease of ongoing maintenance, was necessary due to the remote location of the project. This was particularly relevant in the specification of building services, such as the rainwater harvesting system, which relies on the local supply chain to undertake the necessary annual servicing.Source: Gordon Burniston and Ewan WetherspoonThe building features a flicked canopy roof protecting visitors from the Scottish weather and collecting rainwater to be filtered and reusedDo you have a favourite product or material that was specified on the project?The oversailing roof, which acts as a generous umbrella in the typically wet environment, is overclad with powder-coated aluminium panels beautifully made by a local supplier. The roofline, often described as the brim of the hat, provides a defined line which caps the building and flicks up, signalling the start of the path and the beginning of the journey towards the gorge. The cladding panels have a double function as they define the roof edge and flash over the roof membrane.Are there any suppliers you collaborated with on the project that contributed significantly? And what was the most valuable service that they offered?The windows were specified from the Nordan product range and the local representative provided invaluable assistance during the specification and design development period.What did you think was the biggest success on the project?The biggest success of the project was collaboration between the client team, the contractor and the design team. There was a shared vision to produce a high-quality building, albeit small, in this remote and rural setting and ensure that every aspect was considered and delivered to the best outcome.Source: Gordon Burniston and Ewan WetherspoonThe pavilions are positioned to provide visitors with an auditory and visual experience of the nearby riverSource: Gordon Burniston and Ewan WetherspoonSource: Gordon Burniston and Ewan WetherspoonSource: Gordon Burniston and Ewan Wetherspoon1/4show captionProject detailsArchitect OberlandersExternal windows and doors NordanLarch cladding and SiOO:X treatment RusswoodCLT roof cassettes BinderholzSingle ply roof covering Alwitra ICBRooflights Lareine EngineeringZinc cladding and flashings VM ZincFall restraint systems SFSCommercial kitchen and servery JSSKEStaff kitchen HowdensSanitary cubicles VenestaCorian wash troughs CDUKAirblade wash and dry taps DysonFlooring TarkettResin-bound gravel AbacusGreen retaining wall GravitasLandscape seeding Scotia SeedsOur What made this project series highlights the outstanding work of our Architect of the Year finalists.To keep up-to-date with all the latest from the Architect of the Year Awards visithere.