Staircase House
Adaptation of a pile of stones A
memoir
My childhood is filled with memories of this place.
“A pile of stones” is a rather playful description
for this building in its former state of disrepair. Having been
inhabited by multiple generations of families, represented by
the hardship of peasants and fishermen trying to survive among
the razor-sharp limestone weathered by the salty spray of a rough
coast known for taking lives – some of whom I played with
as a child, the emptiness after people left for other continents
due to famine and war, the hippies that would populate this vacant
place once again – seeking the simplicity of sea, salt,
and the sun, with a minimal request for shelter. I loved having
to walk a mile for fresh water (I still do through habit, although
12 m3 of cold freshwater are now stored below the basement) and,
in the old days, we piled up on the floors at night – sometimes
up to15 people on roughly 40 m2. over three bare stories. And
all this time, the rain and wind ate up the mortar of these roughly
built stone walls which are not made of Venetian marble, just
whatever fragments of stones that had been laying around –
until it literally collapsed on top of the last trace of hippie-ness
on a rainy September morning.
To overcome the romantic attachment to this structure a exciting
perspective had to be introduced to the owners in order to take
on the burden of reinvent the building and its living conditions.
Decisions
The main transformation of the building is the interconnection
of every available space into one habitable structure with the
extension of an additional roof level, which provides a view of
the sea – a desire that until now was never fulfilled within
the narrow alleys of the old village. The one element that makes
this possible is a minimally sized spiral staircase that starts
in the basement (witch is now the entrance level) and winds its
way up through two more floor levels until it straightens out
to the last run parallel to the roof ridge to exit on to a roof
terrace cut out of the original silhouette of the building. To
convert the remaining 180 m2. of each level and therefore expand
that space beyond a generous landing, the staircase is enclosed
in a wooden shell. This barrel has multiple sections that swing
open to allow access to the staircase, to isolate the floor from
the staircase, and to provide the option of dividing each floor
into two separate zones. This last configuration allows for a
playful adaptation of space in order to create different modes
of circulation and privacy.
Task
The building is located at the end of a narrow alley. Every bucket
of dirt had to be carried back to the nearest road, every package
of cement went the other way, and every drop of water had to be
pumped through a hundred yards of hose. Only a local contractor
was willing to do this – that is, utilizing his own range
of materials and techniques.
The main task was the replacement of all wood floor with concrete
floor slabs which were bolted into the exterior walls for structural
stability. Each floor slab had a steel ring cast in place in order
for the spiral staircase to pass through it. These rings were
connected to the reinforcing bars and project above and below
the slab, serving as mounting brackets for the wooden enclosure.
The roof was rebuilt with a concrete form that defines the terrace
with its concrete benches, the enclosure and landing of the straight
end portion of the stair, and the tilted rear roof.
The surface mortar of the 60 cm wide walls was removed –
to the point where one could see through it in some places –
and a new layer of stucco was applied on both sides in order to
straighten the interior side and protect the exterior from the
elements.
Two more additional windows were cut as repetitions of the existing
ones into the exterior wall to allow for additional ventilation.
In the former basement – now the entrance to the building
– one side is divided with 1.80 m high walls (leaving the
exposed concrete ceiling untouched) in order to define a bathroom
with a shower, and a wine cellar. These are the only interior
partitions. All other divisions of spaces are only made possible
through the moveable sections of the staircase’s enclosure.
On the next level, there is a small kitchen next to the door that
leads to the lower terrace.
A cistern was dug into the rock below the basement. The former
outhouse – located in a small exterior arcade – became
the mechanical room for a hot water boiler, water pump and pressure
tank. For the two upper floor, electric floor heating was cast
into the concrete slabs to provide comfort early and late in the
season. These features plus a basic electrical system were the
only mechanical additions.
Material
To isolate the exposed concrete ceiling, the walls (mineral) and
the floor (epoxy) were painted white. A significant reveal separates
the walls from the ceiling and floor, which project further to
connect to the vertical structure.
All steelwork arrived prefabricated on site in portable elements.
After assemblage, all the steel was painted with RAL 7034.
The slats for the wooden enclosure of the staircase were milled
into a trapezoid with a round notch in order to hold a wood rod
for better joinery. Every third slat was connected to the steel
rings, which surround the openings in the floor slabs.
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