|Type of Building:||Residential Building|
|New / Refurbished:||Refurbished|
|Year of construction:||2013|
|Gross Floor Area:||387.9 sq.m|
The house was refurbished to accommodate for a family with 7 members and span into 3 generations. The house has been redesigned to improve the microclimate comfort, blocking heat, shading and using efficiently natural lightning. This new design proposal also improve living environment in order to create better living quality for dwellers. The most noticeable sustainable design is the green façade which enhances the shading effect for the South-East walls. This green façade is not only help cooling the building’s temperature but also beautifies the street and creates a unique looks for Hanoi – a city where most of the building was made of concrete.
Total cost for refurbishment and interior finish is 2.2 Billion VND, equivalent to 9.6 million/m2 in 2012
Design Credit: Vo Trong Nghia Architects
Photo Credit: Hiroki OKI, VoTrong Nghia Architects and E4G
Principal Architects: Vo Trong Nghia, Takashi Niwa, Tran Thi Hang
Architects: Ngo Thuy Duong, An Viet Dung
Natural Conditions and Site Elements
Natural lighting design
Compare to the old design, the new house maximizes the use of grass wall in every surface of the ground floor to take advantage of natural light during the day.
The stair was also modified in order to create more space for shaft openings. Instead of using 2 stairs, the new design only uses 1 stair which helps increasing the vertical lighting area. Space partition in the first floor is also removed to increase the exposed area for the whole floor.
The new design also focuses on creating atriums. The architect removed bedroom area in the 2nd floor and turned it into an atrium facing the green façade with vines.
Shading and heat blocking
The house is only affected by solar radiation in the afternoon during the year.
Sun path in June
Sun path in December
New design proposal has changed the building envelope completely, from a common 1-layer brick skin to double skin envelope with the vines outside to help shading and blocking heat for the inside envelope of the building
The building’s outer skin comprises a steel frame that can help the vines to climb. The chosen plants are Rangoon Creeper, Bougainvillea. Plants are placed in every balcony. Beside, this steel frame can also act as a security system and the green layer can purify the air before it enters the house.
Moreover, the roof is also refurbished from a concrete roof to a garden with grass and trees, which reduce the direct radiation onto the roof and utilize evaporative cooling.
The door system is mostly made of glass. The special and might as well be the most noticeable feature is the rubber seal was used to prevent the house from losing heat. According to previous researches, leaking heat through gaps makes the house became less energy efficiency.
Designers have replaced an old traditional design (which stifles the urban space) with new design that have the green color covering every façade and ground floor courtyard. This is not only increasing the biodiversity for the site in number but also for a community as well.