A renovation is a controlled re-activation of a property's energetic field. Xuan Kong Da Gua (玄空大卦) provides per-degree precision on which sectors carry which hexagrams — and during a renovation, the sequence in which those sectors are physically disturbed matters as much as the final layout. Done well, a renovation sequenced via XKDG strengthens auspicious sectors and weakens afflicted ones. Done badly, it amplifies the wrong hexagrams.
Why sequence matters
Construction is energetic activation: drilling, digging, demolition, and noise all 'wake up' the sector being worked on. The activated sector then dominates the property's qi for the duration of the construction. If the first sector worked on contains an auspicious Period-9 hexagram (e.g., one of the four Wang/prosperity hexagrams), the property's overall energy lifts during construction and tends to resolve into a stronger configuration after. If the first sector contains an inauspicious hexagram (Sha-qi or Period-receding hexagrams), the property weakens during construction and may carry that weakness forward.
The Period-9 sequence (2024-2043)
In Period 9 (current era), the dominant prosperity hexagrams sit primarily in the south sector with secondary support in the east and north-east. A favourable renovation sequence: (1) start with major demolition in a Sha-qi sector (often the north-west or west in Period 9) to discharge accumulated negative energy; (2) construct in the east and south-east next to lay positive foundations; (3) finish with the south sector — the most prosperity-laden Period-9 zone — so that the final activation locks Period-9 wealth energy into the property. Avoid starting any renovation in the south sector — you do not want to disturb the prosperity hexagrams first.
Auspicious construction calendar
Beyond sector sequence, the START DATE of major construction phases also matters. Use the lunar calendar to avoid Tai Sui clashes for the year — never break ground in the Tai Sui direction during its active year. Avoid the Yang Gong Sha days (specific dates each lunar month considered hostile to construction). Practitioners often select the Heavenly Stem and Earthly Branch combinations that resonate with the property's facing-trigram for foundational work — for example, a Kan-facing property benefits from breaking ground on a Wood-element day to support the Water-Wood production cycle.