GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter X 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

SIP OSB panels in contact with raised slab concrete

charsgreen | Posted in Green Building Techniques on

Our builder decided NOT to use a nailer, and instead placed the SIP panel directly on the 2×4 treated bottom sill plate then nailed the OSB directly into the treated plate. However, the OSB panels, both inside and out sit on the concrete. They did use a closed foam sill seal (blue stuff) so in some cases the OSB is sitting (crushed) on the seal and and many places it is directly on the concrete. Is this a problem? It would seem to us that OSB sitting on concrete or on the thin sealer on concrete would be a problem for the non-treated OSB. They did a good job of nailing the OSB (correct schedule). Is it necessary to create a capillary break? If so what debth and what tool. If we create that break will that create a structural problem with the panels. Thank you.

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.

Replies

  1. Expert Member
    MALCOLM TAYLOR | | #1

    Scott,
    We can give you our opinions, but the real one that matters is your SIPs manufacturer who is providing the installation guide and warranty.

  2. charsgreen | | #2

    I agree and am hoping to understand the problem and potential solutions.

  3. GBA Editor
    Martin Holladay | | #3

    Scott,
    Malcolm is correct: the builder needs to follow the instructions provided by the SIP manufacturer.

    The detail in the GBA library (below) keeps the OSB skins of the SIPs elevated, so that the OSB does not touch the concrete.

    .

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |