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Dream Houses

A loft eco-comfort version


Rehabilitating an old warehouse with natural materials to transform it into a loft is the challenge faced by architect Louise Ranck, who specializes in eco-construction. To visit in pictures in the photo gallery ...

How did this project get started ?

From the outset, I imagined the potential of this old factory just habitable, without any comfort and little open on the outside. It was above all a beautiful space that only needed to be exploited. I privileged the volumes with the maintenance of a surface as open as possible on the ground floor. Today, the interior surprises with its brightness and the well-being that emanates from it.

How to save energy while creating openings?

Originally, this old warehouse was dark and virtually windowless. The creation of canopies on the roof and two roof windows (Velux) allowed to highlight this beautiful volume without increasing the heating bill. To obtain this result, all the openings (with the exception of an existing frame on the facade side) have been equipped with low emissivity double glazing, which has a special coating deposited on the inside face of the glazing (an oxide based on titanium or nickel).

This coating acts as a thermal barrier inside the glazing, which reduces heat loss by approximately 30%. For heating, I chose a floor heating low temperature (powered by a gas condensing boiler that has an excellent performance). It emits a gentle heat by radiation.

What are the ecological materials chosen for rehabilitation?

At a conventional insulation like glass wool that tends to pack over time, I preferred cork to insulate walls and roofing. A natural insulator that is interesting both thermally and acoustically. Only problem, it is significantly more expensive than glass wool. The floor of the patio is covered with acacia blades. This naturally resistant essence? hitherto reserved for pickets of vines? is an interesting alternative to the use of tropical exotic woods, which contributes to wild deforestation.

On the walls, you used a coating to the ground ...

Ready-to-use soil compounds offer many benefits: they are environmentally friendly, water vapor permeable and aesthetic. In addition, this natural coating has good inertia: it keeps the heat in winter as the cool summer. And offers a nice finish to the eye. It is also a coating easy to make itself and inexpensive.

Data sheet highlights of the renovation

The choice of materials. Natural materials: cork insulation, earth-rendering, solvent-free paints, and acacia wood for the patio floor.
Energy savings
Heating: condensing boiler, floor heating low temperature hot water, laid under a terrazzo floor (concrete with sanded gravel included). Fireplace extra.
Openings: all bay windows and the glass roof are double glazed low emissivity, that is to say, covered on the inner glazing, a metal oxide to prevent heat loss.

Architect : Louise Ranck, Latitude 48 °, 61, rue des Vignoles, 75020 Paris. Such. : 01 43 73 59 07 and 06 20 78 69 95.