West Africa container house design: Kano January roof-underside condensation over the night cycle, and gutter outlet capacity loss through the Harmattan dry season

Container House Design in Ghana and Nigeria: Harmattan Dust, Two Rainy Seasons and the Dry-Season Condensation Trap (2026)

Ghana and Nigeria container house design: Kano January dew point is 1.5 C outdoors but 11 C indoors, so a bare steel roof condenses every Harmattan night. Why April, not June, is the peak latent load, why the 50 mm gutter outlet is the real drainage failure, and landed cost from USD 23,947 at Apapa against 25,981 at Tema.

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