Register Dashboard
Search
707
views
0
recommends
+1 Recommend
1 collections
    5
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Normal background levels of air and surface mould reserve in UK residential building stock

      Preprint
      This is not the latest version for this article. If you want to read the latest version, click here.

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          This paper reports results obtained from a surface (both visually clean and dirty/dusty surfaces) and active (aggressive) air testing scheme on 140 residential rooms in England, without visible water damage or mould growth, along with a few rooms with visible mould growth/water damage tested for comparison purposes, with the aim of providing background levels of mould in non-water-damaged interiors to benchmark a normal indoor environment, and in turn when there is a need for further investigation, and, possibly, remediation. Air and surface mould was quantified based on the activity of β-N-acetylhexosaminidase (EC 3.2.1.52; NAHA). The obtained readings showed a log-normal distribution. 98% of the samples obtained from visually clean surfaces were equal to or less than 25 relative fluorescence units (RFU), which is suggested to be the higher bound for the range which can be used as a success criterion for surface cleaning/remediation in non-problem buildings. Of samples obtained from visually dirty/dusty surfaces, around 98% were below 450 RFU, which is suggested to define the lower-bound for abnormally high levels of mould, rare even on dirty/dusty surfaces. Similarly, around 98% of the air samples were found to have 1700 RFU or below. Values above 1700 RFU are therefore unlikely in a non-problem indoor environment and can be indicative of a possible problem inducing mould growth. The samples with values below 1700 were further divided into three proposed sub-categories. Finally, these values were compared to those obtained in Denmark in a similar study and are currently used in national standards, and they were found highly congruent, suggesting that local climate regimes and room functions might not be as influential on indoor mould levels, or that the nuances between UK and Denmark in terms of these factors are not strong enough to lead to sizable changes in the typical indoor mould levels in these countries.

          Related collections

          Author and article information

          Journal
          UCL Open: Environment Preprint
          UCL Press
          10 September 2019
          Affiliations
          [1 ] UCL Department of Civil, Environmental and Geomatic Engineering, UCL, UK
          [2 ] Mycometer
          [3 ] UCL Institute for Environmental Design and Engineering, UCL, UK
          [4 ] UK Centre for Moisture in Buildings (UKCMB), UK
          Article
          10.14324/111.444/000020.v1

          This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY) 4.0 https://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited.

          Funding
          Polygon UK and EPSRC IAA EP/K503745/1

          Comments

          Decision date: 20/8/2019

          Handling Editor: Dan Osborn

          This article is a preprint article and has not been peer-reviewed. It is under consideration following submission to UCL Open: Environment Preprint for open peer review.

          2020-09-23 15:14 UTC
          +1

          Comment on this article