Flow investigations for a ventilated, steeply sloping roof. Parts 1 and 2. Stromungsmechanische Untersuchungen an einem beluften Steildach.

Steeply sloping ventilated roofs are preferred for single and two-family houses in West Germany. Notes lack of any scientifically substantiated notions concerning physical laws governing air exchange between ventilated zones and outside air. Describes air flow and heat transfer investigations in a 48 deg. sloping roof. Gives details of roof constructions. Illustrates roof space and distribution of thermocouples and arrangement for injecting tracer gas. Describes experimental procedure. Provides some measurement results. Compares theoretical bases with experimental results. Derives conclusions regarding measurement of cross-section of ventilated area and supply and exhaust air openings.