Roof Wind Load Calculator
A roof is a wing — wind tries to lift it off. See the design wind pressure and the uplift a roof faces from your area’s wind speed, and why cyclone-zone roofs need engineered tie-downs. Uses the IS 875 (Part 3) idea pz = 0.6 × V².
IS 875-3 basic wind speeds run ~33–55 m/s across India; the east & Gujarat coasts are highest.
Wind uplift governs the roof — engineered tie-downs are mandatory (IS 875-3).
≈ 306 kg/m² of suction trying to peel the roof off — this is why edges, ridges & eaves fail first.
That suction must be carried by a continuous tie-down load path — covering → fasteners → purlins → trusses → walls → foundation — with closer fixings at edges. See the cyclone & high-wind guide.
An awareness estimate — not a wind design. It uses the IS 875-3 velocity pressure pz = 0.6 × V² with the terrain/height/topography factors taken as ~1 and indicative pressure coefficients; the real design wind speed and roof pressures depend on terrain, height, building shape and exact code coefficients. Wind design and the roof tie-downs in cyclone/high-wind zones are code-mandated structural-engineering work — a qualified engineer must size them.
Related Guides — Deep-dive reading
Roofing for Cyclone & High-Wind Areas
On India's east coast and the Gujarat seaboard, wind, not rain, is the roof's deadliest enemy. Cyclonic wind tries to peel the roof off like a wing. A plain-language guide to why roofs fly away and the engineered tie-downs — the continuous load path from covering to foundation — that keep them on.
RoofingHow Wind Loads Affect Buildings: A Homeowner's Guide
Wind as a structural force — push, suction and the roof-lifting uplift that wrecks homes in India's cyclone belt; what makes a house wind-resilient, and why so many compound walls fall.
Structural SafetyDoor Wind-Load & Cyclone Performance (India 2026)
How wind pressure attacks external, balcony and high-rise doors, what IS 875 (Part 3) wind zones demand, and how to specify cyclone-resistant frames, locking and glazing.
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An indicative cost range to build a roof in India, by roof type (RCC, tiled, metal, sheet), area, waterproofing, insulation and city — total and per sq ft. A budgeting frame to confirm with local quotes.
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