How to Attach a Bat House to a Masonry Building

Brick, stucco, and cement buildings 

Materials Needed:

  • (1) Bat House from Organization for Bat Conservation
  • (2) 3-inch long exterior grade screws
  • (2) masonry anchors
  • Drill, appropriate driver and drill bit
  • Tape measure
  • Pencil
  • Level
  • Ladder
  • Work gloves*
  • Helper*
  • Non-toxic, latex paint* (color varies depending on region)
  • Caulk and caulk gun**

**Not necessary for OBC’s bat houses.

OBC has years of experience and collaborative research to create a successful bat house.  To purchase our U.S.A. made bat houses, visit our website.  We also supply free plans on how to build your own bat house.

  1. Find a suitable location for your bat house.
    The bat house should be at least 15 feet high and in an area free from obstructions.  It should also receive at least 6 hours of direct sun each day.  In most locations, it is best for the bat house to face east or southeast to take advantage of the morning sun.  To find the best location for your bat house based on your region, view our location recommendations
  2. 2.Paint and caulk the bat house** at least 24 hours before attaching to a structure

    **OBC bat houses are already caulked so you can skip that step!
    Refer to our website for the painting recommendations for your region. 

  3. OBC bat houses come pre-drilled, with 2 holes, 9 inches apart, on the upper mounting portion. Climb up the ladder to the location on the building that you wish to attach the bat house.  Using the ruler, mark two hole locations, 9 inches apart, where you want to attach the upper part of the bat house.  Use a level to ensure that your holes are in a straight horizontal line. 

    If the 9 inch distance does not work for you:  Measure and pre-drill new holes into the bat house and then mark locations on the structure following the instructions described in step 3 with your desired measurements.

  4. Using a proper drill bit, pre-drill holes into the structure that are the same size as the masonry anchors that you will be using.

  5. Hammer the anchors into the pre-drilled holes until they are flush with the surface.

  6. Drill the screws partially into the bat house- just far enough to allow the screw tips to point slightly out of the back of the bat house.

  7. Climbing up the ladder with the bat house, align the screw tips with the masonry anchors in the building.  Hold the bat house in place and drill the screws the rest of the way into the building.

  8. Ensure that the bat house feels secure.

Thank you for supporting bat conservation by providing a new home for bats! How do you know if bats are living in your bat house?  We recommend that you check your bat house as least once a month in the morning during the warmer seasons with a strong flashlight.  You can look for bat guano on the landing platform and under the bat house.  Guano is similar to mouse droppings- it is black and about the size of long-grain rice.  Also be sure to observe your bat house as the sun is setting.  You’ll be able to see and count bats flying out to feed on the insects in your yard! 

Share your bat house success stories with us!

© 2012 Organization for Bat Conservation