The drying out period is the period over which the building dries. The building will have collected moisture during construction, especially if there has been inclement weather, as well as the materials themselves retaining some moisture. Once the membrane and roof is installed the internal area will begin to dry.

This period can very in duration for a number of reasons from the size and layout of the internal structure and perhaps most importantly the time of year. A building constructed in summer will dry out much faster than one built in the winter.

This drying out period can lead to condensation forming, which must be carefully managed via proper ventilation.

Permavent APEX is an air and vapour permeable roofing membrane that allows for condensation control in the roof without the need for additional ventilation. Read more about Permavent APEX by clicking the link here: Permavent APEX