Description
A ventilated cavity behind the cladding of timber frame walls is often considered good building practice that facilitates the removal of moisture from the construction. However, moisture will only be removed from the construction by ventilating it with dry air, whereas ventilating with humid air might add moisture to the construction.
Full-size wall elements with wooden cladding placed in a test building were exposed to natural climate on the outside and to a humid indoor climate on the inside. Temperature and moisture conditions inside the wall elements and climate parameters were monitored. Test parameters included cavity/unventilated cavity/no cavity, cavity size, vent geometry, type of cladding and type of wind barrier.
The potential durability of the wooden façade claddings was evaluated by coupling the measured time series of moisture content, temperature and time by means of a model for mould growth on wood-based materials.
The paper presents results from the investigation with emphasis on a discussion of the effect of cavity ventilation on moisture content in timber frame walls. In terms of moisture content behind the wind barrier, the behaviour of wood frame walls with a non-ventilated cavity was found not to be inferior to the behaviour of wood frame walls with a ventilated cavity.
Emneord: moisture conditions, cavity ventilation, wooden facades, timber frame walls, mould growth
Period | 7 Dec 2010 |
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Event title | Thermal Performance of Exterior Envelopes of Whole Buildings XI International Conference, December 5-9, 2010 |
Event type | Conference |
Location | Florida, United StatesShow on map |
Keywords
- moisture conditions
- cavity ventilation
- wooden facades
- timber frame walls
- mould growth
Related content
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Activities
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Thermal Performance of the Exterior Envelopes of Whole Buildings XI International Conference
Activity: Attending an event › Conference organisation or participation
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Publications
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Timber frame walls: feasible with a damaged vapor barrier?
Research output: Contribution to book/anthology/report/conference proceeding › Conference abstract in proceeding › Research › peer-review
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Timber frame walls: Feasible with a damaged vapor barrier?
Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review