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

Insect Screen with Rainscreen

TJSmall | Posted in General Questions on

I’m currently building a home that has a 1×4 furring strip rainscreen with Hardie Board and Batten siding.  I intend to install a bug screen between the furring strips at the bottom of walls along the ground, but is it necessary to install a bug screen between furring strips at the bottom of walls that terminate at roof intersections (i.e. dormers and roof eyebrows)?


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.


  1. Expert Member


    If you have a rain-screen cavity on any wall it needs to be open at the bottom to both provide a drainage path and air movement. If it's open at the bottom it needs some form of protection against insects.

    1. TJSmall | | #2

      Thanks Malcolm!

  2. user-5946022 | | #3

    Is there a way to install this protection after the fact? I have a rain screen open at the bottom where the 2nd level meets the first level roof for which builder did not install insect screen.

    1. Expert Member
      MALCOLM TAYLOR | | #4


      Depending on how high above the roof surface the siding starts you might be able to get either perforated flashing or Cor-a-Vent up underneath the furring strips. Perhaps easier would be to push folded insect screen up between them.

Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |