Local materiality and creativity come together in a residential design in Bangkok, reimagined by Architectkidd with simplicity and intention.
Located in an early-generation high-rise building in Bangkok, this apartment unit enters a new chapter as a modern residence. Departing from lightweight construction approaches and finishes typically found in new renovations, our interior design balances preservation and upcycling with robust building materials. The main interior space reveals the concrete structure, while sandwash cement is used to establish a visual and tactile connection with the existing architecture.
Sandwash cement is a humble building material - a mixture of small stones and cement, typically combined on-site. Due to its understated nature, sandwash is often overlooked. The term "sandwash" can be confusing, as it is used interchangeably with "exposed aggregate" or "exposed aggregate concrete." After the aggregates (small stones or pebbles) are mixed into the cement, the outer surface is “washed” away to reveal the stone patterns and create a textured finish.
Sandwash holds a distinct place in the modern history of Southeast Asian construction. It was once commonly used for outdoor floors and walls, particularly in homes, schools, and temples in Thailand. Due to its widespread past use - it can still be found in worn-out public areas and buildings across Bangkok - many view it as outdated and unfashionable.
For Architectkidd, sandwash offered opportunities for customization, with various stone types creating distinct textures and appearances. Like its more refined counterparts, such as terrazzo, sandwash can be tailored to suit the needs of any project. It is produced on-site by local workers using small-scale ingredients and hand tools, making it a more energy-efficient and cost-effective choice compared to other finishes.
Sandwash allows for the creation of curved angles and forms that would be more challenging with solid stone or brick. Its ability to mold into smooth surfaces offered versatility while also paying homage to the curved concrete balconies and exterior façade of the building.
Durable and resilient, sandwash cement became a creative interior finish in this design. By experimenting with different cement and aggregate combinations, it was possible to create surfaces that withstand the test of time and wear. The updated kitchen is further enhanced with black cabinetry, and along with the built-in furnishings, modern touches throughout the rest of the home bring the space into the present - without leaving the past behind.
Architectkidd's exploration of sandwash techniques is about rediscovering a material that once played a key role in Thai architecture - a material that may have been forgotten. While it may not be the flashiest or most celebrated, sandwash serves as a reminder that sometimes the simplest materials endure the longest. By working with materials familiar to local builders, the design enhances the feasibility and economy of the construction process.
