Roof covering by making use of flat or curved slabs or stiff sheets (E04D1/00 takes precedence; built-up roofs E04D11/02)

Child Classifications

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• E04D 3/02 of plane slabs, slates, or sheets, or in which the cross-section is unimportant (E04D3/35 takes precedence)
• E04D 3/24 with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like (E04D3/35 takes precedence)
• E04D 3/35 Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation
• E04D 3/36 Connecting; Fastening
• E04D 3/38 Devices for sealing spaces or joints between roof-covering elements (E04D3/36 takes precedence; sealing joints not restricted to roof-covering elements E04B1/68)
• E04D 3/40 Slabs or sheets locally modified for auxiliary purposes, e.g. for resting on walls, for serving as guttering; Elements for particular purposes, e.g. ridge elements, specially designed for use in conjunction with slabs or sheets