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Thermal Mass and Coastal Integration in a Sustainable Timber Retreat

Authors:
Marin Petković, Laura Ibrahić
Thermal Mass and Coastal Integration in a Sustainable Timber Retreat
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Incorporating locally sourced stone and a steel frame, this cabin offers a seamless connection to its coastal environment while providing a multifunctional space for relaxation and outdoor living.
5 key facts about this project
01
Incorporates cross-laminated timber panels for structural efficiency and sustainability.
02
Utilizes charred wooden shingles for enhanced durability and fire resistance.
03
Features a bent A-frame design that optimizes natural light and views.
04
Incorporates locally sourced stones for thermal mass and aesthetic integration.
05
Designed for seasonal adaptability to ensure year-round functionality.

### Overview

Located along the Baltic Sea coastline, the cabin design project aims to harmonize human habitation with the natural environment. Its innovative approach caters to the diverse needs of users while responding effectively to the region’s climatic and geographic characteristics, including strong coastal winds and dense forests. The design prioritizes sustainability through the thoughtful selection of materials and a framework that respects its natural surroundings.

### Spatial Strategy

The cabin features a versatile geometric framework supported by an exposed steel structure and large wooden panels. This configuration allows for a variety of arrangements, accommodating functions ranging from a compact wooden tent to a more open, secluded space. The interior layout is carefully considered, with a central area designated for multifunctional use—sleeping and dining—with movable components to enhance flexibility. Additional spaces include provisions for outdoor cooking and storage solutions for water and equipment, which integrate utility and comfort.

### Material Selection

Construction materials are sourced sustainably to reflect the local context. Predominantly local timber contributes warmth to the cabin, aligning with traditional building practices. The steel framework provides structural integrity while facilitating expansive openings to enhance the visual connection to the surroundings. Additionally, stones collected from the beach are used strategically to create a drainage layer, improve thermal mass, and further integrate the cabin into the coastal landscape. This deliberate choice of materials emphasizes environmental sensitivity and responsible resource management.

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The Next House: USA — A Global Call to Reimagine the American Suburb

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Competition organisers

Buildner is launching The Next House: USA, a global architecture competition that challenges architects, designers, and thinkers to reimagine the American suburban home for the 21st century. For decades, the suburban house has symbolized comfort and stability, but today it often reflects excess, isolation, and environmental strain. This competition asks: how can the American home evolve to address climate urgency, economic pressures, and shifting social values?

Participants are tasked with designing a prototype home of no more than 1,500 sq ft (≈140 m²) for a household of two adults and one child. The design should be compact yet generous, adaptable, sustainable, affordable, and replicable across diverse U.S. contexts. More than a design exercise, the competition aims to spark a conversation about how homes can support healthier, smarter, and more connected communities.

The total prize fund is $20,000 USD. The final registration deadline is May 20, 2026, and winners will be announced on September 22, 2026. The Next House: USA invites architects, students, and visionaries worldwide to redefine what the American home means today—and what it should mean tomorrow.

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