A new methodology of construction is employed in this project which is energy efficient, climatologically appropriate, culturally and contextually relevant, and uses reused and economical and eco-friendly materials.
Climate change and affordable housing are inseparably linked and also in close parity with the social, economic and ecological well-being of the nation. The current practices of ‘Green certified housing’ are an unaffordable model for the masses. The project performs as an innovative technological solution that can be adopted across all regions including flood plains, hot arid and hot humid zones, cold zones and earthquake zones. The prototype is also a scalable model which can be applied for both low-income housing and bungalow type of premium housing. The highlight of the sustainable affordable prototype is that it consumes only 50% lesser resources than a conventional house typology of similar scale and can be easily built with the support of a small labour force on site. A new methodology of construction is employed in this house which is energy efficient, climatologically appropriate, culturally and contextually relevant, and uses reused and economical and eco-friendly materials. The new typology attempts to change both outcomes and processes involved in the conventional house building methods and holistically addresses
the sustainability and affordability of single-family housing units.
The innovative technological solutions introduced in the new typology
Resource-friendly Foundation Systems and Utilitarian Stilt Floor: By implementing a new method of foundation system, the entire footprint of the building is raised on stilt columns and made accessible, and is put to use for cattle shed, poultry, fishpond and dog kennel. The cooler earth in the semi-accessible footprint will serve as a cold air reservoir to assist convective passive cooling for the built form.
Rib and Skin Shell Slab System: An innovative skin shell slab system that requires only 4cm concrete bed saves the resource by 60% in the construction of the floor slab. The new shell slab system is lightweight and saves considerable load on the foundation and is sufficient to manage the conventional loading on a residential structure. The shell slab infill is made with non-degradable solid waste such as plastic, glass, etc. Resource-saving of construction materials and re-use of waste materials are emphasized in the process.
The merits of the rib and skin shell systems are:
Multilayer Roof System: The roof of the structure is made of multilayer lightweight steel fabrication, and futureproofing for solar panel installation is already accounted for in the design details. The 3cm air gap between the reused terracotta tile and the roof sheet assists in convective cooling and keeps the structure cool throughout the hot summer.
Qualities/benefits of multi-layer roofing
Cost-effective and Environmentally Friendly Finishes: Masonry walls are mud washed which retains the property of masonry as breathable walls and gives a chemical-free surface coating. The windows and doors are made out of thin layers of wooden sheath. Only plantation wood is used considering the replenishable aspects of wood in construction. Deviating from the conventional style of openable glass windows, stainless steel insect-proof mesh was used as window frames which in turn rendered the interiors cooler and insect-free. The continuous inflow of air through this mesh maintains the microclimate achieved inside and allows convective cooling enhanced by the cold air from the stilt floor. Centre for Sustainable Built and Natural Environment Kochi, Kerala has developed this innovative typology of house construction which is applicable in different climatic context and is also a scalable model. Under the guidance of Prof Pandala, Ar Ajay Abey and Ar Tara Pandala are continuing their effort in creating people friendly, planet friendly and pocket friendly homes across the landscapes.
Salient features of this innovative method of house construction are:
Factfile
Project: House of Hope, Kochi
Architects: C.S.B.N.E Kochi, Kerala
Client: Shri Abraham Joseph and Smt Jaisly Manuel
Design team: Ar Ajay Abey, Ar Tara Pandala, Prof Eugene Pandala
Consultants: CSBNE (Structural, Mechanical, Electrical, Interior, Landscape & Plumbing, HVAC)
Contractors: CSBNE (Structural and Civil)
Built-up area: 1600sq ft
Cost of project: Rs 27 lakh
Year of completion: 2020
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