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Development of a New Methodology to Anaylse the Durability of Facad e Repair and Retrofitting systems

Objective



Current state of the art in building envelope design and
construction is to a large extend based on empirical
rules. This has resulted and results in poor physical
quality. As a consequence, the retrofitting of building
envelopes remains a permanent concern in all European
Countries. The need for envelope repair is high. For
instance, the annual costs reach +/ 30 Mrd BEF in
Belgium, +/ 2 Mrd FM in Finland and +/ 4 Mrd DM in
Saxony, Germany. Even the choice and application of
repair and restoration methods is in too many cases trial
and error, rather than the outcome of a scientific
performance analysis. This closes the circle of
inefficient design, poor construction, failing repair.
Upgrading envelope repair methodology therefore is a
challenging research topic. In fact, a new rationale,
based on sound scientific knowledge and correct
performance assessment should be developed.
Formulation of envelope performances in a holistic,
scientific way demands first of all a correct definition
of durability. This should be done in terms of risks.
Then the environmental load with the largest impact on
service life should be explored. There, coupled heat,
air, moisture and salt transport (HAMST) plays a key role
as cause of mechanical, physical, chemical and biological
degradation. First obiective of the proposal therefore is
a further development of basic HAMST knowledge. This
should result in full and simplified HAMST models for
durability assessment. The application of models and
computer codes and the development of repair systems,
which not only upgrade aesthetics but also increase
energy efficiency and overall durability however, is not
possible without knowledge of material properties
involved and an understanding of the interaction between
deterioration and climate. Progress in this field forms
objective two of the proposal. Obiective three finally
concerns the development of an overall system of envelope
repair and retrofitting performances, with associated
design rationales, practices and controls.

Coordinator

KATHOLIEKE UNIVERSITEIT LEUVEN
Address
131,Celestijnenlaan 131
3001 Heverlee
Belgium

Participants (8)

Ahlborn Meßtechnik GmbH
Germany
Address
1,Friedrich-ebert-straße 1
98693 Ilmenau
C & R Ingenieurgesellschaft mbH
Germany
Address
1,Kolkwitzer Straße 1
03099 Hähnchen
CT LAASTIT OY
Finland
Address
11,Lyhyenrannantie 11
71801 Siilinjaervi
Cape Building Products Ltd.
United Kingdom
Address
Iver Lane
UB8 2JQ Uxbridge
DRESDEN UNIVERSITY OF TECHNOLOGY
Germany
Address
Zellescher Weg 17
01069 Dresden
Eternit NV
Belgium
Address
1,Kuiermansstraat 1
1880 Kapelle Op Den Bos
HELSINKI UNIVERSITY OF TECHNOLOGY
Finland
Address
4,Rakentajanaukio 4
02015 Hut
Rautaruukki Oy
Finland
Address
51-53,Fredrikinkatu 51-53
00101 Helsinki