Bureau SLA inserts Corian-clad gallery into old timber armoury

Dutch studio Bureau SLA has inserted a smooth white house-shaped art gallery into a timber nineteenth-century Dutch military building.

Basement excavation and Corian-clad gallery by Bureau SLA revive military building

By excavating a three-metre basement, Bureau SLA added an extra storey to the former armoury but kept the original timber structure intact. The building at Fort Asperen in the Netherlands is now used as an art gallery.

Basement excavation and Corian-clad gallery by Bureau SLA revive military building

The move turns a long, low barracks-like building into a much larger, generously proportioned one. The original timber frame, window-frames, eaves and roof were retained, the exterior repainted and a new structure inserted within the existing building fabric.

Basement excavation and Corian-clad gallery by Bureau SLA revive military building

Architect Peter van Assche describes the new structure as a “little house” that contains the bar, stairs and elevator and exhibition space. Its exterior is clad in Corian.

Basement excavation and Corian-clad gallery by Bureau SLA revive military building

“Where the old interior looks more like the inside of an Austrian ski-hut, the new addition looks shiny, bright and white. The skin of the white house has more of an iPhone feeling: seamless, smooth and white, which maximises the difference between old and new,” said van Assche.

Basement excavation and Corian-clad gallery by Bureau SLA revive military building

Internally the triple-height space is timber-lined, with large glass tiles placed beneath the original skylights. The original beams and metal ties pierce the ceiling of the new volume.

Basement excavation and Corian-clad gallery by Bureau SLA revive military building

Van Assche describes the practice’s light touch to restoration. “By not restoring the original wooden monument ‘to death’, the look and feel of the building is not destroyed in the name of sustainability.”

Basement excavation and Corian-clad gallery by Bureau SLA revive military building

“Our restoration philosophy is simply put: repair what is broken, do not touch the rest, make outstanding new additions,” van Assche said.

Basement excavation and Corian-clad gallery by Bureau SLA revive military building

The armoury building is an outbuilding of the Fort Asperen military complex. It sits within the New Dutch Waterline, a network of defensive channels which circle the Dutch cities of Muiden, Utrecht, Vreeswijk and Gorinchem.

Basement excavation and Corian-clad gallery by Bureau SLA revive military building

These channels were developed in the nineteenth-century to protect the Netherlands from invasion from the east. In times of war the network could be flooded by a system of sluices, dikes and flood canals.

Basement excavation and Corian-clad gallery by Bureau SLA revive military building

A layer of water only 40 centimetres deep was enough to make the land difficult to pass for soldiers, vehicles and horses. At the same time, it was not deep enough to navigate by ship.

Basement excavation and Corian-clad gallery by Bureau SLA revive military building

Each year hundreds of bats come to hibernate in the adjacent Fort Asperen. The fortress island used to be completely closed during the winter season, but from now on visitors can visit the renovated monumental armoury all year round.

Here’s a project description from Bureau SLA:


The Armoury

Fort Asperen is one of the most treasured fortresses of the so-called New Dutch Waterline. This longstretched military complex of a series of inundations was made in the 19th century to protect the Netherlands against invasions from the east. The Waterline is so unique, that it was nominated for Unesco World Heritage in 2011. Fort Asperen has been open to the public since 1986, hosting controversial art- and design exhibitions. The fortification is not only popular with people: bats also love it. Each winter the fortress tower closes its doors to make sure that the hundreds little mammals have an undisturbed hibernation. The fortress island used to be completely closed during the winter season, but from now on visitors can visit the renovated monumental armoury all year round.

Basement excavation and Corian-clad gallery by Bureau SLA revive military building

Originally, the armoury consisted of little more than a bare wooden shack next to the fortress tower. Wooden beams, wooden floors, wooden walls and wooden window frames with wooden shutters. An Austrian ski hut, really. The designers of bureau SLA made sure that this rather rustique atmosphere of the armoury was fully kept. This was against the given brief: the intention was to insulate the wooden shack from the inside and to make sure that the place could be used through summer and winter in comfortable climatic conditions. To provide the necessary spaces bureau SLA did a trick: they lifted the shack by a few meters, poured a concrete basement and placed the wooden building back in its original position – now on a new foundation. The insulated basement spaces take care of perfect climatic conditions, while the old armoury provides the authentic feeling of the military past.

Basement excavation and Corian-clad gallery by Bureau SLA revive military building

The basement extension peaks through the ground floor with a shiny white little house. The cladding of the white house is made of the smooth and seamless composite material Himacs/Corian, so that the contrast between old and new is maximised. In the white house we find the main exhibition and conference room. Daylight enters through big windows, that also allow spectacular views from both sides. Bureau SLA strategically placed custom-made glass tiles on the roof, so daylight pours in abundantly where needed.

Basement excavation and Corian-clad gallery by Bureau SLA revive military building

The new Armoury is an example of bringing back life to a (state) monument in a new and unconventional way. By not restoring the original wooden monument ‘to death’, the look and feel of the building is not destroyed in the name of sustainability.

Basement excavation and Corian-clad gallery by Bureau SLA revive military building

Bureau SLA had a similar approach with their design for the New National Glass Museum – not far from Fort Asperen. Their restoration philosophy is simply put: repair what is broken, do not touch the rest, make outstanding new additions.

Bureau SLA also came up with the design of the tables. They are made from leftover wood from the removed attic.

Name: Armoury Fort Asperen
Architect: bureau SLA, Amsterdam
Client: Foundation Monument Fort Asperen
Address: Langedijk 60, Acquoy, The Netherlands
Start design: 2010
Completion: 05/2013
Gross Floor Area: 381 m2
Building costs: ca. € 650.000 ex. VAT
Program: conference and exhibition space, office, bar, restaurant
Contractor: Van den Dool Bouw, Leerdam
Structural Engineer: ABT Delft
Sustainability: Van der Weele Advies, Groningen
Glass Rooftiles: Royal Glass Factory Leerdam, Carina Riezebos
Design team: Peter van Assche, Mathijs Cremers, Hiske van der Meer, Laura Maeztu

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Buddhist Meditation Centre Metta Vihara by Bureau SLA

Dozens of square windows puncture the corrugated steel shell of this barn-like Buddhist meditation centre in a rural part of the Netherlands by Dutch architects Bureau SLA (+ slideshow).

Buddhist Meditation Centre Metta Vihara by Bureau SLA

The Buddhist organisation Metta Vihara asked the architects to create as much space as possible within the modest budget.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

“What we wanted was an aesthetic that was beautiful but not too comfortable,” architect Peter van Assche told Dezeen. “The reason people go to the meditation centre is not to feel cosy – they want to go deeper, to sense something that is not too obvious. The feeling of the building should express this.”

Buddhist Meditation Centre Metta Vihara by Bureau SLA

The resulting building provides beds for 26 people in 13 bedrooms as well as a meditation hall, library and dining hall.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

A mansard roof was chosen as a cost-effective way of providing extra living space while also borrowing from the vernacular architecture of Zeeland, which is near the Belgian border.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

Three colours of corrugated steel have been used for the facades and roof, with red cedar beams marking the top and bottom edges of each steel sheet.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

The square Velux windows have been fitted inside white wooden frames to disguise ugly joints with the steel.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

The end walls are clad in wood salvaged from scaffolding left over by the builders.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

At one end of the building is a large meditation room with glazed walls and corrugated steel shutters, which open out onto a view of the rural landscape.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

Inside, bare limestone has been used for the load-bearing walls while the other walls are made from environmentally certified MDF.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

Polished concrete has been used on all the floors with the exception of the meditation hall, which is covered with black bamboo.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

The architects added: “The building has been warmly received by local residents, as evident in a conversation we heard between two passing cyclists: ‘This new cowshed looks really good, but why does it have so many windows?’”

Buddhist Meditation Centre Metta Vihara by Bureau SLA

We’ve featured two other Buddhist buildings on Dezeen – a house for a priest along the Shikoku pilgrimage route in Japan and a priest’s quarters in the Japanese Alps.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

Site plan – click above for larger image

We previously published Bureau SLA’s National Glass Museum Holland in Leerdam, which saw two houses connected by four overlapping bridges wrapped in aluminium mesh.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

Ground floor plan – click above for larger image

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Buddhist Meditation Centre Metta Vihara by Bureau SLA

First floor plan – click above for larger image

Photographs are by Jeroen Musch.

Here’s some further information from the architects:


The Buddhist Meditation Centre Metta Vihara is located in Hengstdijk – a small village near the Belgian border – in a remote area of the Netherlands. The inhabitants of Metta Vihara (defined as ‘community of loving kindness’ in the Pali language) are members of the Triratna Community, a Buddhist movement not aligned to one traditional school, but one that draws on the whole stream of Buddhist inspiration.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

Long section – click above for larger image

The new accommodation provides 26 beds in 13 one- and two-person bedrooms, a meditation hall, library and dining hall. Form and materials used in the centre relate to the rural vernacular building, but used in a new and fresh way.

As the centre is financed mainly by gifts from community members and friends, one of the design briefs was to maximise the the space while minimising the cost. Our overall design concept was to design a building that, while beautiful, wasn’t overly comforting. This is in line with the philosophy that, while on retreat, one should feel relaxed but not necessarily ‘at home’. As a result, Metta Vihara has strong aesthetics that feature robust and raw materials.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

Long section – click above for larger image

The overall form of the meditation centre is an interpretation of the so-called Mansard roof, also known as the French roof. Used throughout the area (mainly because of its low cost), the Mansard roof is found widely on houses and barns. The facade of the centre – along with the cladding of the roof – is made of corrugated steel, a material popular for its low cost, strength, and long life. Typically, the drawback of using corrugated steel is in the ungraceful way it joins with other materials, specifically at the corners and in the overlays. At Metta Vihara, however, it has been used ‘as is’: no joints and no connections. Western red cedar beams and white wood window frames mark the transitions from one steel sheet to the next, with the horizontal lines of the beams giving the building depth and profile. Three different colors of steel are used, and in three different wavelengths. Indeed at first sight, it is not at all clear what the scale of the building is: does it have five floors? Three? Two?

Buddhist Meditation Centre Metta Vihara by Bureau SLA

Cross section A

The same approach of using raw materials in this new way is also used in the design of the windows. The windows in the steel skin – in facade and roof – are standard Velux windows, which are technically superb and relatively inexpensive. As with the corrugated steel, however, there is often an aesthetic compromise in the joints with other materials. In the case of Metta Vihara, though, they are framed with white painted wood, giving them a distinctive look.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

Cross section B

As a contrast to the more industrial looks of the steel, the short sides of the building and the terrace walls are cladded with wood, a robust but also warm material. For this, wood already available on site was used: the leftovers of the scaffolding wood used by the builders. The structure’s interior consists of unfinished building materials, albeit used in a considerate – even delicate – way.

Structural walls are bare unplastered lime stone. Floors are raw concrete, polished and uncovered, with the exception of the meditation hall, which features black bamboo flooring. Non-loadbearing walls are made of ecologically manufactured MDF sheets and are coated with transparent colours, in order that the structure of the material remains visible.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

Cross section C

In the meditation hall, doors open to the outside, allowing open air meditation. When closed, these doors – made of perforated corrugated steel – serve to filter the sunlight. This gives the space an intimate atmosphere, providing optimal conditions for meditation. The building has been warmly received by local residents, as evident in a conversation we heard between two passing cyclists: “This new cowshed looks really good, but why does it have so many windows?” The Metta Vihara building is the first newly built meditation centre in the Netherlands.

Buddhist Meditation Centre Metta Vihara by Bureau SLA

Cross section D

Project: Buddhist Meditation Centre Metta Vihara
Start design: 2009
Start building: 9/2011
Opening: 6/2012
Gross Area: 465 m2
Building costs: ca. €650,000 ex. VAT
Design: bureau SLA
Client: Metta Vihara
Address: Hengstdijkse Kerkstraat 36, Hengstdijk, The Netherlands
Program: 13 bedrooms, meditation hall, library and dining hall
Contractor: Van Kerckhoven Bouw, Kloosterzande
Structural Engineer: Sineth Engineering, Schiphol
Sustainability: Sunraytec, Woerden
Project team: Peter van Assche, Hiske van der Meer, Gonçalo Moreira, Charlotte Vermaning, Justyna Osiecka

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by Bureau SLA
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