PatternRecommended
Light on Two Sides of Every Room
Pattern 159Description
Every habitable room should have natural light from at least two sides (two adjacent walls). Single-sided light produces glare and shadow.
Why this exists
Two-sided light is the difference between 'naturally lit' and 'gloomy.' Most cherished rooms in any house have it.
Categories
Daylight
Source
Christopher Alexanderno manifest entry
A Pattern Language (1977 (Oxford University Press))
Section: Pattern 159
Published 1977-01-01 · last verified 2026-05-09
Solver enforcement
Browsable only — the solver does not currently enforce this directive (no spec-level data to check against). This entry exists so the architect personas can cite it in conversation and the user can read what the rule says.
Related directives
- Long Thin House · Pattern 109
- Indoor Sunlight · Pattern 128
- Zen View · Pattern 134
- Tapestry of Light and Dark · Pattern 135
- Sleeping to the East · Pattern 138
Last reviewed 2026-05-09.