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Important factors affecting the risk of mold growth in well-insulated wood frame walls in Northern European climates

Författare

Redaktör

  • Richard Karney
  • Andre Desjarlais

Summary, in English

Due to increased awareness of climate change and energy costs, well-insulated buildings have become more common. Furthermore, greater interest has been shown in using wood in building to produce more carbon dioxide-efficient houses. However, thicker thermal insulation in walls increases the risk of high relative humidity levels and the risk of mold-related damage in wood frame houses.

This paper presents important factors affecting the risk of mold growth in well-insulated wood frame walls in Northern European climates. Recent findings regarding important factors are first briefly summarized. The paper continues with a parametric study in which moisture-critical positions in traditional Swedish wood frame designs are investigated by using hygrothermal modeling. Traditional North European walls with insulation thicknesses of 220 mm are compared to walls with thicker thermal insulation and alternative designs. The influences of the different wall designs in relation to the risk of mold growth are compared using isopleth and a visual mold chart.

It has been found that there is a higher risk of moisture-related damage in thicker insulated walls. However, this risk could be reduced by choosing more suitable designs in which well-ventilated air gaps behind the cladding and exterior vapor-permeable moisture resistant thermal insulation boards are of great importance.

Publiceringsår

2013

Språk

Engelska

Publikation/Tidskrift/Serie

[Host publication title missing]

Dokumenttyp

Konferensbidrag

Ämne

  • Building Technologies

Nyckelord

  • Wood framed walls
  • Moisture safety

Conference name

Thermal Performance of the Exterior Envelopes of Whole Buildings XII

Conference date

2013-12-01

Conference place

Clearwater, Florida, United States

Status

Published

ISBN/ISSN/Övrigt

  • ISBN: 978-1-936504-61-9