Blog

HERMIS > Blog > Uncategorized > Filling the gap before Siga Fentrim tape? – GreenBuildingAdvisor

Filling the gap before Siga Fentrim tape? – GreenBuildingAdvisor

  • August 24, 2025
  • Posted by: sherwin@eyeconz.com
  • Category: Uncategorized
No Comments
filling-the-gap-before-siga-fentrim-tape?-–-greenbuildingadvisor

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.

Start free trial

Replies

  1. Expert Member

    MALCOLM TAYLOR | | #1

    Emel,

    You are fine using closed-cell spray foam. Water vapour can move though diffusion around the small area of impermeable foam.

    1. Emel | | #2

      Do I need to seal the seam after the foam between the joint to stop any possible water movement?

      1. Expert Member

        MALCOLM TAYLOR | | #3

        Emel,

        No. The foam (or backer-rod and caulk) is there as a support so that the tape is not bridging large gaps, not as part of the moisture management.

Recent Questions and Replies

Leave a Reply