5 Considerations for Expansion Joint Moisture Barriers

Determining if moisture barriers are required for expansion joints on your building project is critical. Anywhere there is moisture entering a building, it is imperative that you manage the draining. To help, we’ve put together the top 5 considerations for your reference.

  1. The environment, as reflected in local building codes, determines the type of moisture barrier required.
  2. Some expansion joint systems contain an integral moisture barrier, while others call for an ethylene propylene diene monomer (EPDM) drape-in material. An integral expansion joint system has formed lugs that fit into a receiving framework. This makes for an easier installation and stronger assembly.
  3. Will the floor get wet or be mopped?
  4. The drape-in moisture barrier is a flat material which comes in rolls and draped across the joint and sandwiched into each side of the joint to collect and drain away moisture. Similar to a gutter.
  5. Consider drainage requirements, sloped or tubed every 100 feet and directed to a building drain.

Nystrom understands the codes and complexities surrounding expansion joints. For more information, or to see how Nystrom can help on your next project, please visit www.Nystrom.com.