GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Audio Play Icon Headphones Icon Plus Icon Minus Icon Check Icon Print Icon Picture icon Single Arrow Icon Double Arrow Icon Hamburger Icon TV Icon Close Icon Sorted Hamburger/Search Icon

Community and Q&A

Slab on grade and plumbing penetrations

John Rockwell | Posted in Green Building Techniques on

I am looking for specific information about detailing plumbing waste lines for a slab on grade on Cape Ann (north of Boston, Zone 5A). I am concerned about sub-slab insulation, the air barrier, vapor barrier and general coordination of excavation, concrete and plumbing trades. I am familiar with Building Science Corporation’s recommendations for polyethylene location and “no fines” in the stone layer.

Thank you,
John Rockwell
Rockport, MA

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. David Meiland | | #1

    Prior to the pour, tape the pipe penetrations to the plastic sheet, then put a piece of pipe insulation around each pipe that sticks up flush with top of slab. Later, if you want to, you can trim the pipe insulation below the slab a bit and replace with canned foam. There are a few useful details shown near the end of this document http://www.metrowaterproofing.com/documents/STEGOW15.PDF

  2. User avatar
    Jesse Thompson | | #2

    The 100K House folks used to have a very good page on using Stego wrap and how to seal penetrations, luckily the Google cache is still visible: http://bit.ly/vy8XvA

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |