|Type of Building:||Residential Building|
|New / Refurbished:||Refurbished|
|Year of construction:||0|
|Gross Floor Area:||224 sq.m|
When the Mesh house was bought, the rough framing was already constructed, therefore, in terms of space, there is not much the architect can do. Architects have found some solutions to renovate and optimize the design as well as improving the living environment make a comfortable space for the owners.
Mesh house is located on the corner of the street, which has two open facades, as a result, natural lighting is not an issue needs to be considered like in other tube houses in Hanoi. However, the North-West and South-West oriented facades are exposed to the strong radiation from the sun. Consequently, the problem here is blocking heat in the afternoon. Another problem is that the Mesh house cannot take advantage of the prevailing wind from South-East. In this case, the prevailing wind direction is parallel to the length of the house, so natural ventilation is another concern.
The design of the Mesh house is a good example for another house with disadvantages of West-facing or East-facing walls that are affected strongly by solar radiation in summer.
Design consultancy & Service
Due to disadvantages of the house’s orientation, the architect has to employ a unique building envelope: double-skin envelope with an air layer in between. Besides the ordinary brick layer, the building also covered with white prima panels (cellulose fiber reinforced with cement) as the second skin, so the direct radiation to the wall or glazing is greatly reduced.
Prima ximang basque
Cement Cellulose fiber layer is placed offset 6cm from the wall and have voids, which plays the role of an air-buffer layer between the 2 skins. The air layer will constantly bring the heat created by radiation out and help to reduce the wall’s temperature. In this way, the building is cooled remarkably without using much energy for the HVAC system. Beside, in hot days, rainwater is pumped upward through pipes to form mist between the 2 skins to enhance the cooling efficiency.
Natural ventilation is considered very carefully. The stair is located outside, so the architect can add a skylight space in the middle. This space encourages cross ventilation for bedrooms with both inlet and outlet.
Windows system – building envelope
The weather of Hanoi has 2 clear seasons, therefore, the building envelope need to have flexibility (and should have double skin) to adapt to different seasons.
In the Mesh house, double layer windows systems: inside glazing, outside shutter can also be flexible (as described below) to optimize the comfort level for the family:
- In summer, at night: close the shutter and open the glazing
- In summer, in daytime: open the shutter and open the glazing
- In winter, in daytime: open the shutter and close the glazing
- In winter, at night: close the shutter and close the glazing
Windows have low sill height and the wings are long and narrow. This helps air circulated at low height, at the sitting range of the owners, which optimize the cooling design.
The house is designed with large glazing, so all the living space is fully illuminated.
Usually, the West oriented house with this large glazing will be overheat in summer due to glass house effect. However, all the glazing is combined with wooden door or prima cement cellulose fiber layer (which create the second skin) to ensure natural ventilation as well as shading and blocking heat for the building.