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WOFATI, which stands for Woodland Oehler Freaky-cheap Annualized Thermal Inertia, represents a sustainable building solution that merges affordability and energy efficiency. Developed by Paul Wheaton, WOFATI draws inspiration from Mike Oehler's earth-sheltered designs, enhancing them with cost-saving strategies and a focus on harmonizing with the surrounding environment. This innovative approach prioritizes using locally sourced natural materials like wood and earth, thereby minimizing reliance on manufactured products and lessening the building's ecological impact. The concept of Annualized Thermal Inertia is central to WOFATI design, harnessing the surrounding earth as a thermal mass to regulate temperature fluctuations throughout the year. This natural heating and cooling system stores summer heat for winter warmth and retains winter's coolness to moderate summer temperatures, significantly reducing energy consumption. WOFATI buildings typically feature large windows strategically placed on the uphill side to maximize passive solar gain, further enhancing energy efficiency. As the name suggests, WOFATI structures are ideally situated on or near a woodland, emphasizing a symbiotic relationship with nature. Examples of WOFATI buildings, including Allerton Abbey and Wofati 0.8, can be found at Wheaton Labs in Montana

Hugelkultur is a raised garden bed building technique where wood is buried ("soil on wood") under soil. Hugelkultur, which means "hill culture" in German, can be implemented on a small scale in backyards or on a large scale, as demonstrated by Sepp Holzer, a renowned permaculture practitioner who uses hugelkultur in his terraced gardens. This technique involves layering logs, branches, twigs, and even whole trees, creating a foundation for the bed. This buried wood becomes "a sponge to hold water", reducing or eliminating the need for irrigation. As the wood decomposes, it attracts beneficial microorganisms and creates air pockets, leading to nutrient-rich, fertile soil. Hugelkultur helps gardeners "grow a typical garden without irrigation or fertilization". This technique can be used to grow garden plants like "rhubarb", "potatoes", and more. Hugelkultur is an example of permaculture design, which emphasizes sustainability, self-sufficiency, and working with natural systems

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.

Hugelkultur is a permaculture technique that can be described as "soil on wood". It involves burying wood, including logs, branches, and twigs, to build raised garden beds. This technique, which can be small or as large as a kilometer, creates a beneficial environment for plants. As the wood decays, it provides nutrients to the soil and improves drainage and aeration. It also becomes "a sponge to hold water," reducing or eliminating the need for irrigation. Using wood that would otherwise be discarded for hugelkultur is an environmentally sustainable way to improve soil health and grow food

WOFATI, an innovative sustainable building technique coined by permaculture advocate Paul Wheaton, stands for Woodland Oehler Freaky-cheap Annualized Thermal Inertia. The design utilizes readily available natural materials like wood and earth to create a "soil on wood" structure that harmonizes with the surrounding woodland. The "freaky-cheap" construction methods pioneered by Mike Oehler and further developed by Wheaton significantly reduce building costs. WOFATI structures are characterized by a double layer of membrane, a "two-skin" system that encapsulates the earthen roof, ensuring dryness and longevity. The principle of Annualized Thermal Inertia is key, using the earth's mass to regulate temperature, providing passive heating in winter and cooling in summer. WOFATI houses feature large windows on the uphill side for optimal passive solar gain, while the downhill side typically boasts a large gable roof, also incorporating glazing for natural light penetration. Allerton Abbey, located at Wheaton Labs, serves as a prime example of a WOFATI house