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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)?

Thanks.

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Replies

  1. Expert Member
    MALCOLM TAYLOR | | #1

    TJSmall,

    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

      CL,

      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.

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