- Planning and Design
Planning and Design Process
The location within a National Park required the architecture to reflect the rural landscape. The extension needed to sit lower than the existing building, as not to dominate or detract from the main visitor centre. This was achieved by partially sinking the extension into the landscape to accommodate two floors, and topping it with a flat brown grass roof, camouflaging it into the surrounding woodland. The new entrance extension acts like a limpet, hugging the existing building and protruding from below its eaves. Its shape follows the curve of the external wall of the existing building.
The choice of home-grown timber and sympathetic material specification places the building humbly into the breath-taking landscape. Over time the materials have weathered naturally, and the building has become ever more unassuming in situ. The building is the first Brettstapel constructed building in the UK to be made from from domestically grown and manufactured softwood.
Key Sustainability Points
Whilst embracing innovative technology, for which the building is celebrated, the design also intends to eliminate unnecessary technology and reduce complexity. Architype has employed ‘passive principles’ to ensure good and robust performance that depends on the integrity of the building as a whole before turning to add-on renewables. The design orientates the building for optimised natural daylighting, with solar shading for the summer months. Triple glazed windows and the elimination of thermal bridging prevents heat loss, as well as rigorous insulation made from recycled newspaper which forms an important ‘duvet layer’attributing to the building’s outstanding airtightness, ((0.93a.c.h@50pa). Mechanical Ventilation with Heat Recovery (MVHR), is the highest performance heat recovery system (in excess of 90%) and severely reduces the need for additional heating during occupation.
We ensured that all of the timber used on the Coed-Y-Brenin project came from sustainable, FSC certified sources. We were in the unique position to specify much of the timber from the clients own Welsh woodland, including Western Red Cedar for the balcony and Larch, felled on site for the external cladding. We chose timbers that needed little or no treatment, both to reduce the environmental impact, and help the new building fit harmoniously in the woodland landscape. With all of these timbers locally sourced and processed, the overall carbon footprint was dramatically reduced avoiding excessive shipping distances of heavy materials, which would have otherwise been incurred.
The scheme has been designed to BREEAM Excellent and is on course to achieve this rating. Measures to achieve this have included a sedum roof, specified by a conservation team, sustainable waste drainage, a woodchip boiler, which alone incurs an operational cost of approximately half of the conventional energy price.
“The new visitor centre at Coed-y-Brenin is not only architecturally pleasing, it's also a fantastic example of how local timber can be used to excellent effect.”
Rob Penn, British Writer, Photographer and Broadcaster
- Design and Construction Information
Client: Natural Resources Wales (formerly Forestry Commission)
Structural Engineer: Integral
M and E Engineer: E3 Consulting Engineers
Contractor: Pochin Construction Limited
Other Design and Construction team: Cost: Sweett Group, BREEAM: Halcrow Yolles
Date of Completion: June 2013
Contract value: £1,200,000
Site Area: Gross Internal Floor Area 400 m2
Funding: Natural Resources Wales
Awards: Winner of the Highly Commended Prize for Sustainability at the Constructing Excellence Wales Awards 2015, shortlisted for Eisteddfod Gold Medal 2015