If your Purple Martin family is growing, then the Add-a-Floor for the Goliad Purple Martin house is perfect for you. This modular aluminum addition has 4 complete, full sized rooms.
Designed to fit on the bottom of your Goliad system, you can add 2-4 additions safely under your 12 room systems.
Addition includes all needed hardware to mount your Add-a-Floor to your Goliad system.
Door entrance holes are 2-1/8 in wide by 1-1/8 in tall. Choose round or Starling-resistant Crescent entrance.
Each level has 4 rooms room size is 6 inch x 12 inch x 6 inch.