CASE STUDY
PIIL TINY HOUSE, Estonia
LOCATION: Estonia
PRODUCTS USED: Grad® Flat Rail System, Thermopine Cladding, Thermoash Decking
PHOTOGRAPHER: Liu Yifan
ARCHITECT: @arsenit
Piil: A Tiny House Retreat with the Grad® System
Piil, derived from the Estonian word “piiluma” (meaning “to look”), is a beautifully designed tiny house that redefines nature getaways. Nestled among the trees, this 19m² retreat is carefully crafted to harmonise with its surroundings while offering a breathtaking view of the landscape.
Project Highlights
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Smart, compact design – Despite its small footprint, Piil maximises every inch of space, offering both functionality and comfort.
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Seamless indoor-outdoor connection – A large panoramic window floods the interior with natural light and enhances the feeling of being surrounded by nature.



Solutions Implemented
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Thermopine Cladding: A natural, durable timber that provides a warm and rustic aesthetic, blending seamlessly with the woodland setting.
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Thermoash Decking: Extends the living space outdoors, creating a durable, weather-resistant surface that allows guests to fully immerse themselves in nature.
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Grad® Flat Rail System: Used for both cladding and decking, this innovative hidden-fix system enables fast, precise installation with no visible screws. It ensures a flawless finish while simplifying maintenance for long-term durability.
Results
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Blending with nature – The thoughtful selection of materials ensures the structure integrates effortlessly into the forest landscape.
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Uncompromised comfort – The Grad® system’s precision-engineered installation guarantees a high-quality, low-maintenance finish.
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Sustainability-focused – With a minimal environmental footprint and responsibly sourced materials, Piil is a prime example of eco-conscious design.
Conclusion
Piil is a perfect fusion of contemporary design, sustainability, and smart construction. The Grad® system played a key role in achieving a clean, modern aesthetic while ensuring long-lasting performance. This project highlights how innovative solutions can transform even the smallest spaces into a high-quality, low-impact retreat.
PRODUCTS USED
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THERMO PINE & THERMO ASH
Thermally treated wood.