platdak
Platdak is a term used in Dutch to refer to a flat roof, defined as a roof with little or no pitch. In architectural practice, platdak describes roofs that are horizontally oriented or slope only slightly (commonly 1–3 degrees) to facilitate drainage. The design emphasizes a continuous waterproofing membrane over a structural deck, with insulation and a drainage layer to channel water to gutters or internal drains. In Dutch-speaking regions, platdak is a standard typology for residential and commercial buildings.
Construction typically involves a structural deck made of concrete or timber joists, followed by insulation, a
Advantages of platdak include the potential for usable roof space, ease of installing mechanical equipment or
Green roofs and roof terraces are common evolutions of platdak, offering environmental benefits but requiring careful