Standing seam, valley flashing and capillary action


  #1  
Old 09-07-20, 09:58 PM
B
Member
Thread Starter
Join Date: Aug 2001
Location: USA
Posts: 72
Upvotes: 0
Received 0 Upvotes on 0 Posts
Standing seam, valley flashing and capillary action

I'm trying to track down leaks in a standing seam roof. Valley flashing has been tucked underneath the standing seam part of the roof for one to two feet and screwed down. Does the seam where the valley flashing and the standing seam part overlap need to be caulked or sealed? I know that capillary action can make water go uphill, but is that a concern in this case?
 
  #2  
Old 09-07-20, 10:22 PM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Posts: 29,640
Received 1,643 Upvotes on 1,471 Posts
Typically metal roofs should have a high temp ice and water underlayment, so they should never leak. Caulking the edges of the valley flashing will trap any water that is behind it like a dam and with no way to drain it will cause it to back up. If its leaking, ultimately a poor job of drying the roof in is to blame.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: