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

Slab on grade polyethylene placed below or above foam board insulation

Bob Holodinsky | Posted in General Questions on

Is there any issue placing the plastic sheeting under the foam board insulation to protect it from punctures caused by rebar placement and tears during the pour?

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. GBA Editor
    Martin Holladay | | #1

    Bob,
    Above the foam is better. Otherwise the poly can hold water from rain (if it rains before the concrete can be placed) or from bleed water that comes from the concrete. The water will keep the concrete damp for a long time, and may delay installation of the finish flooring.

  2. Bob Holodinsky | | #2

    Thank you ...I will have to stress the importance of not compromising the plastic sheeting when preparing for the pour...regards,Bob

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |