Dune House – Bergen aan Zee
The owners of the office designed their own house in the dune area of Bergen aan Zee (NH). An important design topic was to connect the form and the materialization of the house with the place where it is situated.
The building enjoys a dominant position on a dune crest. They therefore have chosen for a strong “object-quality”. Handling the building plan as a starting point within the zoning plan and the existing building regulations was also a challenge. The admissible constructing surface was 20 x 8 meters, with a gutter height of 3 meters. The ridge height was not indicated and therefore a ridge height of max. 15 meters was possible. These proportions made it possible to build the house vertically, an opportunity achieved by realizing three high storey. One of the main concerns was that, in its appearance, the high tall form had to fit in the dune landscape. During the design process this form became one of a dune or of a windswept group of trees sloping along with the worn landscape near the sea. The openings in the roof surface of the storey were designed from within: at the sea side as horizontal window strips and at the dune side as a huge window, where it is possible to imagine oneself in the midst of the dune landscape. The flat facade on the eastside eventually allows for a lift and balconies.
Materialization and low-tech
For quite some time they have been looking for the appropriate materials on the outside. Because the house is only 300 meters from the sea, they took the logical decision to choose for natural, sustainable and low maintenance materials. They called this a low-tech approach.
For the oblique façade- and roof skin they thoroughly searched for an existing material that would fit into the rough romantic scenery. In the end, Jetty came up with the idea to design herself a tile that would fit the desired agenda. Following the remarkable Kolumba brick (Petersen Tegl) which was to be used for the dressing of concrete columns, a long ceramic flat tile was developed of 53 centimeters long, 17 centimeters high and 4 centimeters thick. These tiles give the impression of pot lid shelves, but ones which are much more low maintenance. The brown/purple appearance of the British clay with its rough finish has to visually match the bark of the surrounding firs. Thanks to all these characteristics, the building now perfectly fits into its surrounding environment.
This developing process took one and a half year. It has also been helped by the excellent cooperation of the professionals of Petersen Tegl. The tile has now been included in the collection of Petersen and used in several buildings in Europe.
The finishing of the eaves has been carried out in zinc and has been pre-treated against ionization, which beautifully matches the tiles. The untreated wooden frames are made of Iroko, FSC approved and carefully handpicked to have the longest parts, in order to avoid gluing as much as possible. The reason to make use of untreated wood at this location stems from its low maintenance aspect, which also fits into the natural surroundings.
Where, if necessary, a lift can be build, the concrete stabilization drives have been closed with untreated western red cedar parts.
The building façade has a timber frame with a high insulation value. Because of this starting point they could easily design the bent and beveled forms as a basis. The basis of these elements consists of whitewood collar beams with multiplex sheets. These are built in several prefab parts, made in the workshop, for a smooth progression of the building process and to generate as less disturbance in the protected green area as possible.
Building period: 2008-2009
Adress: Bergen aan Zee
Client: Jetty and Maarten Min
Video: Chris Houtman
Photographs: Sjaak Henselmans
Photographs: Erik Boschman
Photographs: Liesbeth van der Wal
Photographs Bodo Mertoglu
Photographs: Min2 bouw-kunst B.V.
Illustrations / Sketches: Min2 bouw-kunst B.V.
The low-tech approach continues also on the inside of the house. They wanted the two floors as one big, rudimentary finished space, which can then be used as a flexible living space, a new loft.
One of the wishes has always been to live on these upper storey because of the marvelous views of the sea and the dune area. In the penultimate version the starting point was a house with columns to be built above an existing bungalow: a second house above the first. After deliberation with the constructional engineer, it was finally decided to demolish the existing house because of the poor condition of its foundation. The carrying grid with its column structure emerged from this history.
They were also inspired by warehouses, by the farmhouses in the north of Holland, and by translating the Maison Domino by Le Corbusier into a handy craft level.
By applying Douglas firs with bark, they wanted to bring the effect of windswept trees around the house also into the interior, but in an abstract way. The floor of the first storey has been made as a wooden prefabricated element, hanging between the Douglas firs. Galvanized steel coupling agents have been designed. The concrete elements in sight are untreated.
On the ground floor are storage, studio, bathing room, library, working room and conference room. The inner walls and doors on the ground floor are non-bearing, so to be as flexible as possible, and made of ecoplex and mdf. Sometimes a book cast is also acting as the separating wall between spaces. The stairs have been placed into the space as loose elements. They are made of fast growing poplar, so as to be as environmentally friendly as possible. This kind of wood is soft but very dense, and has no knots. The beautiful light color does not turn yellow, so it can remain untainted. Only the stair steps can use some extra protection.
The floor finishing consists of poured concrete and the hanging wooden floor slab between the trees has been covered with sea weed carpet.
High-tech and sustainability
They aimed to achieve as high as possible value of the materials and the goal was to reach a Rc of 5,0. The choice was made for superior insulating glass with as less as possible color fading taken into account. For the studio we choose for colorless glass, in order not to have our work with colors influenced by the green radiation of glass. The ventilation system is on demand controlled and offers smart solutions for the intake of fresh air. A vacuum cleaning system has been installed for a better interior environment. The domotic system is a basic one, but can be enlarged in future. The electricity supplies are provided in floor ducts.
In relation to the energy supply they do not make use of a natural gas installation. They use an air pump (because of the location on a dune), and glass vacuum tubes providing the heating – or cooling – of the floors and hot water. They very closely follow the evolution of sustainable power generation on the market which also will be aesthetically interesting. Those new products can be added in the present layout.
At this moment they monitor their power consumption to see which amendments will be necessary in order to reach the best values.
The designer as contractor
They carefully searched for the parties best suited to build specific parts. In this way is was quite natural to be working with wood and consult specialists as boat builders and woodworkers. They experienced that, with this attitude, they could inspire and stimulate other people. This is the basis for further developments. They now live in the house and decisions concerning the interior, functions and forms are just starting to emerge. Piece by piece they handle the interior the same way as they handled the building process.
Drawings: Min2 bouw-kunst B.V.