WUFISeminar 04

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Standards and Guidelines
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Contents
German Standard (Building Code)
WTA-Guidelines
Standards and Guides in Europe and NA
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DIN-Standard 4108-3
DIN 4108-3 Thermal protection and energy economy
in buildings Protection against moisture
subject to climate conditions from July 2001 is
referred to in the state building codes. It
prescribes the Glaser-method but recommends the
use of hygrothermal simulations for the following
situations ? drying of construction or
precipitation moisture ? green roofs ? unusual
indoor or outdoor climate conditions
EN ISO 13788 Euro-Glaser computing interstitial
condensation on a monthly mean basis has not been
adopted by the DIN committee
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Contents
German Standard (Building Code)
WTA-Guidelines
Standards and Guides in Europe and NA
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WTA-Guidelines
International Association for Science and
Technology of Building Maintenance and Monument
Preservation
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WTA-Guidelines

• Over the past twenty years WTA has developed into
  an international platform with members from
  different European countries. They have now
  organized Regional Branches to help address
  complementary tasks, such as
• Organization of seminars, conferences and expert
  discussions
• Cultivating contacts with local research
  institutes and regional authorities for the
  protection of monuments
• Introducing relevant topics into the work of the
  WTA divisions
• Adapting new insight elaborated by WTA to
  regional conditions
• Translating WTA-Guidelines into the respective
  national language

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WTA-Guidelines

• WTA-International (located in Munich)
• Regional Groups
• Germany North South
• Netherlands
• Belgium
• Switzerland
• Austria
• Hungary
• Czech Republic
• Slovenia
• Expected new regional Groups
• Poland, Egypt, Malaysia, Singapore, China

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WTA-Guidelines

• WTA divisions (usually comprising several working
  groups)
• Wood protection (div. 1)
• Surface technology (div. 2)
• e.g. anti-graffito systems, renovation and salt
  extracting rendering systems
• Natural stone (div. 3)
• e.g. impregnation, stone substitutes and repair
  materials, cleaning methods
• Masonry (div. 4)
• e.g. rising damp protection, repointing
• Concrete (div. 5)
• e.g. durability issues, impregnation, ground
  water sealing
• Physical and chemical fundamentals (div. 6)
• Structural integrity (div. 7)
• Half-timbered constructions (div. 8)
• e.g. building physical loads and limits, retrofit
  measures, recommendations for occupants

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WTA-Guidelines

• WTA-Guideline
• 6-2-01/E Simulation of Heat and Moisture
  Transfer
• specifies hygrothermal simulations as an
  alternative to the Glaser-method
• 6-1-01/D Leitfaden für hygrothermische
  Simulationsberechnungen (Application guide for
  hygrothermal simulations) will also be issued in
  English
• Motivation of WTA to produce theses guidelines
• Glaser-method proved to be completely
  inappropriate for the hygrothermal assessment of
  repair measures and rehabilitation design

The European standard draft prEN 15026
Hygrothermal Performance of Building Components
and Building Elements Assessment of Moisture
Transfer by Numerical Simulation is based on
this WTA-Guideline
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WTA-Guidelines

• Content of WTA-Guideline 6-2-01/E Simulation of
  Heat and Moisture Transfer
• Potential and limitations of current simulation
  methods
• Physical fundamentals
• Material properties
• Boundary and initial conditions
• Numerical solution (grid size, time steps,
  accuracy checks)
• Documentation of results

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Contents
German Standard (Building Code)
WTA-Guidelines
Standards and Guides in Europe and NA
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Standards and Guides in Europe and NA
ASTM MNL 40 Moisture Analysis and Condensation
Control in Buildung Envelopes (2001)
Chapter 9 A Hygrothermal Design Tool
for Architects and Engineers (WUFI
ORNL/IBP)
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Standards and Guides in Europe and NA
ASHRAE Standard 160 Design criteria for
moisture control in buildings (should be
published in 2005) European Standard prEN
15026 Hygrothermal performance of building
components and building elements - Assessment
of moisture transfer by numerical simulation
(August 2004)
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Standards and Guidelines