Requirements of inverted roofs with a drainage layer.

Hans-Peter Leimer, Carsten Rode, Hartwig Künzel, Thomas Bednar

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


    This contribution illustrates the application of the standard EN ISO 6946 regarding the heat loss of an inverted roof for different regions of Europe. An addendum to the standard (EN ISO 6946:1996/A1, 2003) introduces a correction to the thermal transmittance of inverted roofs due to rain water flowing between the insulation and the waterproofing membrane. It is possible to calculate the extra heat loss of inverted roofs caused by rain water below the heat insulation. The extra heat loss depends on the average rainfall and on which fraction of the rain water that will drain between the waterproofing membrane and the thermal insulation. This paper explains the application of the standard for areas of Europe. Furthermore, some constructions are proposed, which have such small extra heat losses caused by rain water that they may be disregarded in the calculation.
    Original languageEnglish
    Title of host publicationProceedings of the 7th Nordic Symposium on Building Physics
    Publication date2005
    Publication statusPublished - 2005
    Event7th Nordic Symposium on Building Physics - Reykjavik, Iceland
    Duration: 13 Jun 200515 Jun 2005
    Conference number: 7


    Conference7th Nordic Symposium on Building Physics
    Internet address


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