WUFI Workshop NTNU / SINTEF 2008

Standards and Guidelines

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Standards and Guidelines

Contents:

German Standard (Building Code)

WTA-Guidelines

Standards and Guides in Europe and NA

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Standards and Guidelines

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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Standards and Guidelines

Contents:

German Standard (Building Code)

WTA-Guidelines

Standards and Guides in Europe and NA

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Standards and Guidelines

International Association for Science and Technology of Building Maintenance and Monument Preservation

WTA-Guidelines

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Standards and 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

WTA-Guidelines

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Standards and 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

WTA-Guidelines

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Standards and 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

WTA-Guidelines

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Standards and 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

WTA-Guidelines

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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Standards and 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

WTA-Guidelines

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Standards and Guidelines

Contents:

German Standard (Building Code)

WTA-Guidelines

Standards and Guides in Europe and NA

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Standards and Guidelines

Standards and Guides in Europe and NA

ASTM MNL 40: Moisture Analysis and CondensationControl in Buildung Envelopes (2001)

Chapter 9: A Hygrothermal Design Tool

for Architects and Engineers

(WUFI ORNL/IBP)

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Standards and Guidelines

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)

Standards and Guides in Europe and NA

WUFI Workshop NTNU / SINTEF 2008

Standards and Guidelines