Return to Installation
Return to Forum
Hello. Are purlins needed as an extra layer between underlayment and metal roof? We are concerned about condensation trapping moisture.
The risk of condensation is generally inside the attic. If you have good attic ventilation that meets code, you should not need battens to create a thermal break on the roof. Here's a link to a webinar on this topic that I have done: https://www.youtube.com/watch?v=NYwD9CWveKY
If you would like to reply to this thread, please
If you do not have an Ask the Experts forum user account,