None of the eight is original to this project. Each was arrived at by building, and each turned out to have been written down already — usually decades earlier, often with the arithmetic attached. The sources are named beneath each one, because a principle with a practitioner behind it is a citation and a principle without one is a slogan. Think of a structure as a living thing inside universal laws. Gravity demands structural integrity. Solar impact demands windows and shade. Elemental impact demands longevity. Life forms demand habitat, food and resources. Every force makes a demand, and a building is nothing more than a set of answers to those demands — chosen deliberately, or by default.
01 Loss before generation
Every unit of heat a building never loses is a unit it never has to make, store, move, or pay for. The envelope is the only system with no moving parts and no failure mode. Spend there first, and you spend once.
Harold Orr's team put the ratio on it in 1977: a dollar spent reducing heat loss saved at least ten on the solar equipment needed to do the same job. Wolfgang Feist standardised the approach as Passivhaus in 1991. Amory Lovins named the economics — tunneling through the cost barrier.
02 Orientation is free, correction is expensive forever
The sun's path over a site is fixed, published, and costs nothing to design around. The cheapest decision in the whole project is which way the long wall faces — and it is made before anyone breaks ground.
Victor Olgyay wrote the technical case in Design with Climate, 1963. Christopher Alexander reduced it to an instruction in 1977: place the most important rooms along the south edge and spread the building along the east-west axis.
03 Mass remembers, insulation forgets
Thermal mass stores energy; insulation refuses to pass it. Opposite jobs, not interchangeable. Mass belongs inside the insulated boundary. Put it on the wrong side and you have not built a battery, you have built a bigger thing to heat.
Edward Morse patented mass behind glass in the 1880s; Trombe and Michel built the first full-scale version at Odeillo in 1967. Michael Reynolds demonstrates the ordering rule most clearly — Earthship mass sits inside, which is exactly why the insulation goes outside it.
04 Geometry beats machinery
An overhang that shades August glass is the same overhang that admits January glass, with no sensor, no controller and no service call. Anywhere a shape can do the work of a machine, let the shape do it.
Hassan Fathy's whole practice. The malqaf windcatcher, the mashrabiya screen and the salsabil cooling basin dropped temperatures at New Baris by as much as 15°C with no machinery. Nader Khalili: what matters is the understanding of geometry and the forces of physics.
05 Every surface is a decision about energy
There is no neutral square foot. A window is not a hole in a wall; it is a deliberate trade of insulation for light and winter heat. Make the trade on purpose and it pays. Make it by habit and it costs.
Edward Mazria's Passive Solar Energy Book, 1979, assessed twenty-seven design patterns governing solar performance and taught readers to measure the light actually reaching a site. Alexander's pattern 159, Light on Two Sides, is the comfort half of the same discipline.
06 Design the flows, or they design themselves
Heat, air, water and light move through a structure whether or not anyone planned a path. Unplanned, they find the weakest joint. Planned, they become the ventilation, the daylight, the drainage and the heat distribution.
David Holmgren's second permaculture principle is catch and store energy — make hay while the sun shines. Gather at peak abundance, draw down in scarcity. That describes a battery bank and a concrete slab in one sentence.
07 Stack the functions
The slab is structure, thermal mass and heat distribution. The south glass is daylight, view and a furnace that runs on nothing. When every element carries three jobs, the building gets simpler as it gets more capable.
Bill Mollison's founding rule: every element serves several functions, every function is supported by several elements. Reynolds made it architectural — an Earthship is six systems in one structure, not a house with six features attached.
08 Fail slowly
Off grid there is no utility truck coming. Resilience is not that nothing breaks — it is how long the building stays habitable after something does. A house that becomes uninhabitable the moment the power stops was never independent.
The evidence is which buildings still work. Orr's 1977 house stands with its envelope performing as designed; Feist's Kranichstein terrace has been monitored across 27 years of occupancy. Neither has needed its core replaced, because there is little in either to replace.
These are not new laws. They are the ones every builder obeyed before cheap energy made it possible to ignore them — thick walls, deep porches, south-facing rooms, root cellars, windbreaks, buildings sited by watching the land through a full year before laying a stone. What is new is that the old wisdom can now be measured, and the small remaining gap closed with technology.
