Bringing light into the attic: instructions for use

Bringing light into the attic: instructions for use


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The layout of the attic involves the installation of a suitable device allowing natural light to enter this particular space. But more than the choice of the type of window, the concern is especially in the calculation of the necessary glazed surface, the arrangement of the windows, the choice of the splaying or even the slope of the roof. hazard.

Determine the glass area required

Installing an opening that is too small in a room under the eaves will not provide enough light. It is therefore necessary to use artificial lighting in parallel. This generates an additional cost without bringing enough comfort to the person. To take advantage of sufficient natural light, the surface of the device must represent more or less 16% of the surface of the room. For example, a space of 30 M² requires a glass surface of approximately 5 M².

One or more windows?

It is wise to opt for several glass surfaces rather than just one in order to better distribute the light. For example, for a glass surface of 4 M², a single roof window will light only 46% of the room while four roof windows of 1 M² of glass surface each, and perfectly distributed, will light 65% of space.

Determine the correct splay

The splay (sometimes falsely called embrasure) is the part that flares from the window inward. When they are vertical, the lower and upper splay allow much more light to pass than when they are horizontal. They also allow a better distribution of the heat diffused by a radiator placed under the roof window, avoiding an accumulation of condensation responsible for molds.

Roof pitch: a criterion not to be overlooked

The position of a window designed for the attic must be determined according to the slope of the roof. It is she who will impact the brightness of the room. On a roof with a slight slope, the window should be placed in height, whereas it should be installed much lower in the case of a significant roof slope. To take advantage of the overhead light, it is therefore better to install several tall glass surfaces rather than just one large one.

What type of window to choose?

Apart from these indisputable selection criteria, everyone will choose their natural light source according to their tastes and can bring a particular style to their home. A skylight or a sitting dog for a rustic touch, an aluminum roof window for a contemporary accent, even a gable bull's-eye for its elegance. Windows to be fitted with blackout blinds to completely obstruct light when necessary. But if we are looking for speed of installation, the skylight is the most effective and economical solution for optimal brightness and a trendy style.


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  4. Balmoral

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