Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6697153 | Building and Environment | 2018 | 10 Pages |
Abstract
A microbiologically safe crawl space was determined with hygrothermal simulation utilizing the Finnish Mould Growth Model and a two year examination period. The optional structures of the crawl space being depressurised with exhaust ventilation included an open base uncovered ground and various air-sealed closed structures. When mould growth of building materials was at medium resistant sensitivity class, mould was not observed during different air change rates in any of the examined structures. Open base uncovered gravel ground is a functional solution of a crawl space, only when there are no organic materials. The air-sealed ground structure is recommended build with concrete + insulation and when air exchange rate (ach) varied from 0.2 to 1 hâ1. A concrete ground in the crawl space having ach from 0.2 to 0.6 hâ1 is also very effective. XPS insulation and plastic sheet covered ground are not recommendable due to their high mould index.
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Authors
T. Keskikuru, J. Salo, P. Huttunen, H. Kokotti, M. Hyttinen, R. Halonen, J. Vinha,