The house is full of light!

Now let’s talk seriously. In order to obtain a building permit, it is required to fulfil lighting standards such as EN 15193 (energy-efficiency of lighting), STN EN 14665 (lighting criteria) or EN 14464 (working-site lighting). According to the standards, the area of windows in a house must be at least 10% of its floor surface. The average of Molehouse is 15% – that means it is much better illumined then conventional houses.

Quantity of light

In Molehouse, you can adapt the indoor light according to your desire. The south-facing orientation of the house is only an advantage thanks to which the quantity of light and heat increases. For your information, the sun shines from the south in our latitudes.

A south-facing window provides much more energy savings than a north-facing window because it accumulates more solar energy during the day than it loses during the night. Therefore, windows in Molehouse are considered as active heating elements. On the contrary, the balance of heat gain and heat loss of a north-facing window is negative. That is why most of the houses have only small windows on the north, or none at all – like Molehouse. This gives you a big advantage over others.

Reach of light

The reach of light into the house is normally 6.0 meters, and there are many different possibilities to extend it. The simplest way to do so is to set windows higher in the wall, ideally just below the ceiling. The second option is to build a sloping roof higher on the side of windows so that they can be larger and set even higher in the wall (example of the Molehouse Hoblina and its living room). There is also the possibility to bring more light into the house using sun tunnels, atriums, or optical fibres. However, price and performance vary according to a particular house. It is ideal to have rooms that do not require direct illumination from the exterior like toilet, bathroom or technical room in the back of the house, like in a flat.

The functioning of shading in summer: one possibility is to build an overhanging roof. However, you can also choose exterior blinds or shutters. By the way, interior blinds provide almost no protection against the heat in the house – once the heat gets through the window, it already heats up the house. The interior blinds only protect you from infrared light. Another suitable solution is awning that is used to shade only when it is necessary, without preventing the house from daylight as is unfolded horizontally.


Have a look at our accomplishments.


We disposed of a north-western slope and wanted a Molehouse. We had no idea it could have facade on two sides. Thus, we benefit from privacy as well as sunlit home.



We want a house that makes us self-sufficient, a house, where we will be able to grow vegetables even in winter. We want a house, of which it will be easy to care.



After a long reflection, we chose Molehouse Pod Lesom (“Below the Forest”), because it meets our two critical requirements – self-sustainability and comfort.