How To Build A Cat Condo Out Of Cardboard Boxes. Gather cardboard boxes and cut out doorways or windows from the front or sides of the boxes if needed. Take the top box flaps fold them up so they align with the roof and glue them in place let it dry and then glue the actual roof on top of that.
Cut the upper part of the box and fix the other box vertically over it. Position the second door on the left of this side. Hold flaps in place until glue is set.
Secure the flaps to the side of the box with a line of hot glue.
Cut out any additional holes for outside access. Hold flaps in place until glue is set. Gather cardboard boxes and cut out doorways or windows from the front or sides of the boxes if needed. How to build a cat condo with cardboard Step 1.