Moisture Transport in Flat Roofs with Perforated Vapour Barriers

Petr Slanina, Sarka Silarova & Petr Slanina
In European Standards EN 15026 and EN ISO 13788 the moisture transport in a building envelope is assumed only as one dimensional transport. In fact three-dimensional moisture transport is occurred due to layer perforation or building details. The paper is focused on cases of flat roofs when a vapour barrier is perforated. The sd-value measurement of different vapour barriers with different degree of perforation has been done by the Wet-Cup method. The results of the...
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