Abstract
In primary phase of testing building physical characteristics of the EnviHUT project extensive and semi-intensive roofs with 30° inclination occurred exceptional substrate subsidence. An extensive testing field with retaining geocell-system evinced differential subsidence of individual sectors after six months. Measured subsidence of installed substrate reached 40 % subsidence compared to originally designed height (intended layer thickness). Subsequent deformation of geocell-system additionally caused partial slide of substrate to drip edge area. These slides also influenced initial development of stonecrop plants on its surface. Except functional shortages the aesthetical function of the whole construction is influenced by the mentioned problem. The stated paper solves mentioned issues in view of installation method optimization, selection and modification of used roof substrate and in view of modification of geometric and building installed elements retaining system arrangement. Careful adjustment of roof system geometry and enrichment of original substrate fraction allow full functionality from pitched extensive green roof setting up. The modification scheme and its substantiation is a part of this technical study output.
Highlights
In AdMaS sites of Brno University of Technology AdMaS there is ongoing longitudinal study of behaviour of different variants of vegetative roofs
EnviHUT is designed as a small portable holiday building with container frame construction and roofed with pitched green roof with three variants of vegetation layer
EnviHUT is intentionally exposed to aggressive impact of climate, especially strong wind, many North European design solutions and components were used in construction
Summary
In AdMaS sites of Brno University of Technology AdMaS there is ongoing longitudinal study of behaviour of different variants of vegetative roofs. This paper is about evaluation and description of these two major defects in construction
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