FLAT ROOF: Warm Roof Construction

Outlet ⟶① – ④ always thermally insulated, two draining levels, with connection also at the vapour barrier, to form an outlet then sealed against the pipe. For thermally insulated discharge pipe with condensation layer ⟶④ for prevention of damage due to condensation.

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The surface slope to the intakes should exceed 3%. A ‘ventilator’ for the expansion layer is not required. The flexible joint should be continued to the edge of the roof ⟶⑤ – ⑧. The edge details must be flexible, using aluminium or concrete profile ⟶⑤ – ⑧; zinc connections are contrary to technical regulations (cracking of roof covering). Wall connection should be ≥ 150 mm above the drainage level and fixed mechanically, not by adhesive only. If steel roof decking is used as a load-bearing surface, the roof skin may crack due to vibration; precautions are required to increase the stiffness by using a thicker sheet of covering of 15 mm woodwool building board (mechanically fixed), to reduce the vibrations (gravel ballast layer) and crack resistant roof sheeting. The vapour barrier on the decking should always be not fused (due to thermal conduction).

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This “FLAT ROOF: Warm Roof Construction” is taken from the book Architects’ Data written by Ernst Neufert, whereas this book has become the guideline for architecture college students in the world.


1 Comment

  • Roof Slopes and Flat Roof – i-deahouse September 10, 2017 at 4:28 pm

    […] for expansion due to heat; consequently, flexible joints arrangement over supporting walls (see FLAT ROOFS: Warm Roof Construction ⟶⑤ – ⑧)  and separation of internal walls and roof slab (Styrofoam strips are first attached by adhesive […]


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