GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

corner protector

charles3 | Posted in General Questions on

I’m putting some polyiso board beneath a door threshold. The edge of the board is going to get a lot of abuse there, so I need a corner protector that’s at least 2″ x 2″. What would be the cheapest yet durable angle material to use?

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.


  1. Expert Member
    BILL WICHERS | | #1

    I would probably use some PVC trim board here, which can be found in extruded angle profiles. It’s probably not the absolute cheapest option, but it’s durable and readily available.


  2. charles3 | | #2

    Thanks, but a board seems much to thick since it would create a tripping hazard. To be safe, it should be no thicker than the aluminum threshold, which is 7/16".

Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |