The Clerestory Window
Clerestory windows bring elevated, indirect light deep into interiors. Placed hi
Local term: क्लेरस्टोरी खिड़की — ऊँची दीवार खिड़की (Klerastorī Khiḍkī — Ūnchī Dīvār Khiḍkī)
Modern Vastu strongly recommends clerestory windows on North walls for the most even, glare-free daylighting. East clerestories bring energizing morning light from above. The elevated placement makes clerestory windows more forgiving than standard windows — even West-facing ones are moderately acceptable. South clerestories should use diffusing glass. Building science confirms north-facing clerestories as the gold standard for consistent interior illumination.
Source: Contemporary Vastu + daylighting design standards
Unique: Daylighting science confirms N-facing clerestories as optimal for even illumination.
The Clerestory Window
Architectural diagram for The Clerestory Window
The Rule in Modern Vastu
Ideal
N, NE, E
Clerestory window on North wall for even, diffused, glare-free daylighting, per modern Vastu consensus integrating classical prescriptions with contemporary building practice — the architect must verify compliance before the Griha-pravesha ceremony.
Acceptable
NW, W
East clerestory for morning light; West with diffusing glass.
Prohibited
S, SW
Placing the clerestory window in S (Yama's zone) or SW (Nairuti's zone) violates Modern Vastu principles — the contemporary Vastu consensus synthesizing classical prescriptions warn against this placement as it disrupts the directional energy balance that the architect must maintain for the dwelling's wellbeing.
Sub-Rules
- Clerestory windows face North for diffused, indirect light▲ Moderate
- Clerestory is operable for stack ventilation▲ Minor
- Clerestory faces South or Southwest without shading▼ Moderate
- Clerestory creates harsh glare on interior surfaces▼ Minor
Clerestory windows bring elevated, indirect light deep into interiors. Placed high on North or East walls, they provide the purest form of Urdhva Prakash — gentle illumination without glare or direct view. South-facing clerestories intensify heat due to the steep sun angle.
Common Violations
Clerestory windows facing South without any shading
Traditional consequence: Intense overhead Agni Vridhi (fire increase) — the high angle of southern sun pours directly into elevated openings, overheating the interior from above and creating harsh light patches on walls and floors.
Clerestory creating intense glare on interior surfaces
Traditional consequence: Vikshipta Prakash (scattered harsh light) that creates visual discomfort — the elevated opening becomes a source of Tejas (sharp brilliance) rather than gentle Prakash (soft light), disturbing the room's Shanti (peace).
How Other Traditions Compare
Relative to Modern Vastu
Temple Mandapa elevated lighting — clerestory as sacred illumination principle.
Wada Uchha Khidki — high windows above Osari for central Chowk illumination.
Tamil Agraharam Mēl Jalandhirā — upper window for deep narrow house plan lighting.
Kakatiya Mandapa clerestory — temple hall upper-window illumination.
Hoysala Mandapa clerestory Jali — filtered elevated light in temple halls.
Kerala Vaathil Madam — natural clerestory through roof-level height differences.
Gujarati Otla upper windows — clerestory lighting for entrance vestibule.
Bengali Uthhan Janala — raised central roof clerestory for Dalan illumination.
Kalinga stepped-roof clerestory — tiered roof gaps for progressive light filtering.
Gurdwara elevated Parkash — high windows for divine light in prayer spaces.
Terms in Modern Vastu
Universal:
Remedies & Solutions
Adjust door orientation to face North — evidence-based spatial correction
Modern VastuAdd an external brise-soleil or louver to a south-facing clerestory to filter direct sun
Install translucent or frosted glass in a south-facing clerestory to diffuse harsh light
Add a motorized blind to control light entry through a south/west clerestory during peak hours
Remedies from other traditions
Adjust door orientation to face Uttara — Yantra installation and Vedic Havan
Vedic VastuAdjust door orientation to face Uttar — Hemadpanthi stone remediation
HemadpanthiClassical Sources
“High windows above the Lintel line, where the wall rises beyond the main roof, shall face Uttara (North) or Purva (East). These Urdhva Gavaksha (elevated windows) bring light from the sky zone without admitting direct ray or glare — the Prakash descends gently from above like divine grace.”
“Windows placed high in the wall, near the junction of wall and roof, admit the celestial portion of directional light. On the Uttara face, such openings capture the steady, shadowless Kubera-light. On the Dakshina face, the elevated position intensifies rather than moderates Yama's heat, for the sun strikes down into the opening.”
“The Sthapati may raise one wall above the adjoining roof to create an Uchcha Gavaksha (high window) — this admits Prakash without Drishti (direct view), bringing light to the interior while maintaining privacy. Such openings are most beneficial on the Uttara or Purva face of the raised wall.”
“A window set high, where wall meets sky, receives the purest Prakash — uncontaminated by ground reflections or street energy. This elevated Gavaksha on the Uttara wall brings heaven-light into the dwelling without opening the dwelling to the world's gaze.”
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