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The "freaky-cheap" aspect of WOFATI is fundamental to its appeal and accessibility. Inspired by Mike Oehler's pioneering work in earth-sheltered building, WOFATI prioritizes utilizing readily available natural materials, primarily wood and earth, minimizing reliance on expensive, manufactured products. By embracing the "freaky-cheap" ethos, WOFATI construction drastically reduces building costs, making sustainable living a more attainable reality. The emphasis on "soil on wood" construction eliminates the need for a traditional concrete foundation, further reducing expenses. This approach also facilitates rapid building times, as demonstrated by the construction of WOFATI structures at Wheaton Labs, such as Allerton Abbey. The use of recycled or salvaged materials, whenever possible, further contributes to the affordability of WOFATI buildings. By minimizing material costs and construction time, WOFATI empowers individuals to create sustainable and comfortable dwellings without incurring significant financial burdens.

"Woodland" management, as described by Ben Law in his books The Woodland Way and The Woodland Year, promotes active human participation in shaping and nurturing the ecosystem. This approach prioritizes the long-term health and resilience of the woodland, recognizing its value not only for timber production but also for food, medicine, wildlife habitat, and overall ecological well-being. The choice of "woodland" over "forest" in describing Wofati design reflects a deliberate shift away from extractive forestry practices towards a more harmonious and sustainable relationship with the natural world. This distinction highlights the importance of language in shaping our understanding and approach to land management, emphasizing the need for conscious and mindful stewardship of the Earth's resources.

WOFATI structures demonstrate remarkable effectiveness due to their unique design features and emphasis on passive systems. The "two-skin" system, characterized by a double layer of membrane, protects the structure from moisture, ensuring dryness and longevity. WOFATI designs prioritize the use of natural and locally sourced materials, primarily wood and earth, significantly reducing the building's environmental impact and embodying the "freaky-cheap" philosophy pioneered by Mike Oehler. The core principle of "Annualized Thermal Inertia" harnesses the earth's thermal mass to regulate temperature fluctuations, providing passive heating in the winter and cooling in the summer. Large windows strategically placed on the uphill side, along with a spacious gable roof on the downhill side, often incorporating glazing, maximize passive solar gain, further enhancing energy efficiency. By minimizing reliance on artificial heating and cooling systems, WOFATIs achieve substantial energy savings. Allerton Abbey, the first WOFATI built at Wheaton Labs, exemplifies the practicality and success of this building technique

WOFATI, an acronym for Woodland Oehler Freaky-cheap Annualized Thermal Inertia, is an innovative approach to sustainable building developed by permaculture expert Paul Wheaton. WOFATI structures are designed to be eco-friendly, utilizing locally sourced natural materials, primarily wood and earth. These structures are intended to be located on or near woodlands, promoting a harmonious integration with the natural surroundings. Annualized Thermal Inertia, a key element of WOFATI design, harnesses the thermal mass of the surrounding earth to provide passive heating in winter and cooling in summer, thereby minimizing the need for artificial temperature regulation. WOFATI structures are inspired by the work of Mike Oehler, a pioneer in earth-sheltered building known for his simple, "freaky-cheap" designs, which Wheaton has adapted and refined to further reduce construction costs. WOFATI buildings are typically characterized by a large gable roof on the downhill side, with at least 35% of the uphill wall featuring glass or other light-transmitting materials to maximize passive solar gain. Allerton Abbey, the first WOFATI structure, and Wofati 0.8 are both located at Wheaton Labs in Montana and serve as prominent examples of this unique building style.