Moisture transport and convection in building envelopes - ventilation in light weight outer walls
Gudum, C.
2003 PhD Thesis, Technical University of Denmark, Publication R 047
Gudum, C., (2003), "Moisture transport and convection in building envelopes - ventilation in light weight outer walls", PhD Thesis, Technical University of Denmark, Publication R 047.
Abstract:
When occurring, convection is known to be the dominant type of moisture transport. The different parts of the building envelope are protected against convection by ensuring that connections are airtight. In ventilated building components the outdoor air passes through a ventilated cavity on the outside part of the insulation, in order to keep the design dry by exploiting the potential of convection to transport moisture coming from inside the building.
Previously light weight facades have been ventilated and used only in one or two storeys. The Danish building regulation were however in 1995 adjusted to permit wooden facades in up to four storeys, provided that the fa?ade was designed without cavity. Another change in fa?ade designs has been a continuing increase in insulation thickness as a function of demands for decreased heat loss. For these reasons the present PhD project has focussed on designing and validating a model for analysis of the effect of ventilation and insulation thickness upon the moisture load of the wall. (....)
