Stratum House by stpmj

An architectural experiment on divisions of stacked concrete layers

Project Specs


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Appreciation towards stpmj for providing the following description:


Stratum House seeks a new way of concrete casting method simulating a geologic formation. Concrete works in a combination of cement, water and aggregate. Cement is mixed with water to form a paste, and its properties are strengthened together with aggregates. These pastes wrap and fill aggregates of various sizes and become hardened. The project started with a curiosity of concrete composition, its casting process, and reaction on the results from testing the changes of its constituents.

▼住宅鸟瞰,bird eye’s view


Three constraints are applied; water-cement ratio, use of diverse aggregates and different amount of pigment. The change of concrete shape according to the slump value is the first. When the water ratio is increased, the slump value is increased. The concrete forms a shape close to the horizontal. On the other case, the slump value is reduced and the mound is formed with a mass. The second is the variety of texture on exposed concrete surface depending on the ratio of fine to coarse aggregate. The last is the color changes of the surface. With the combinations of these three variables; shape, texture and color, the concrete of each different quality is cast on-site everyday. It allows to have delicately designed divisions of stacked concrete layers showing time differences.

▼住宅外观,external view

▼两栋体量相互垂直,two houses sit on perpendicular with each other

▼三个家庭共享的庭院,the front courtyard shared by three families

▼口袋空间,pocket terrace

▼对混凝土变量的调控形成表面细致的分层,the delicately designed divisions of stacked concrete layers



Stratum House consists of two separate buildings for three families. Two houses sit on perpendicular to share a front and back yard for social gardens and dining. Unit plans are small yet functionally figured. Living rooms are placed towards South and East for sun exposure and maximized view. Kitchens and rooms are connected to the living room with a stair. On the second floor two buildings have individual terraces for private family activities. The buildings outdoor spaces on each level create a dialogue among sequences penetrating inside and outside of the building into nature.

▼客厅朝向南面和东面,living rooms are placed towards South and East

▼厨房和楼梯间,kitchen and stair


▼模型(粉色表示保温层),insulation model

▼混凝土浇筑样本,concrete cast samples


▼混凝土浇筑时间表,concrete cast schedule

▼场地平面图,site plan

▼一层平面图,ground floor plan

▼二层平面图,first floor plan

▼剖面图A,section A

▼剖面图B,section B

Architect: stpmj
Location: Icheon, Kyunggi, Korea
Program: Multi-Family Residential
Site Area: 975 sm
Gross Area: 208.7 sm
Structural Engineering: Centum Engineering
Construction: ON Architecture
Client: Private
Completed Year: 2017 / Jun.
Photograph: Song Yousub

Concrete Pigment: Wooshin
Window: Inoutic
Floor: Eagon

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