DBPapers
DOI: 10.5593/SGEM2014/B62/S26.005

ANALYSIS OF DOUBLE-SHELL ROOF VENTILATION IN A PREFABRICATED APARTMENT BUILDING

J. Vojtus, M. Kovac,
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-21-6 / ISSN 1314-2704, June 19-25, 2014, Book 6, Vol. 2, 33-40 pp

ABSTRACT
The principle functionality of double-skinned flat roofs is sufficiently obvious. The
actual design and technological solution of such roofs is by itself quite omplicated,
especially where the actual geometry of the roof, orientation - windward / leeward side and particular elements supporting structure, solutions vents and other sheath
perforations can worsen air flow in the cavity. This work was based on the need to gain a better understanding of the air velocity using simulation as a form of verification of the functionality of ventilated air gaps in real constructions. The moisture regime of roofs with open air layers is usually assessed as satisfactory in terms of operational reliability by a sufficient margin [1]. Flow simulation is used to reveal local imperfections, realize moisture diffusion from residential spaces, through ceilings without a vapour barrier, which would ensure the free flow of unwanted condensation on cold surfaces of the envelope leading to defects in the roof.

Keywords: roof, building construction, double skinned roofs, air gap, thermal
insulation,