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

Underground roof with a tarp

DavidKing2017 | Posted in General Questions on

Is it a good idea to use tarp as the material for underground roof?

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

    David,
    No.

    -- Martin Holladay

  2. GBA Editor
    Martin Holladay | | #2

    David,
    Tarps degrade rapidly. Underground roofs require a heavy rubberized membrane like EPDM or a heavy peel-and-stick product or a pond liner -- and sometimes they require multiple layers of these heavy-duty membranes. They also require careful planning for drainage (using dimple mats, crushed stone, and perforated pipes.)

    What are you building that requires an underground roof?

    -- Martin Holladay

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |