Step 3: Lift the hatches Boys!
I found that it was best to glue the rounded sections before i cut the roof covering to size, as you will need a few inches to form a hinge between the two sections (the lid and the box base)
Start with one edge of the cardboard roll, and match it to one corner of your lid edge. Glue along the interior seam of the two edges. when you have glued along the length of the curved edge leave 2inches or so to use as a hinge
When you have glued one side, start on the other... you *SHOULD* by now have a domed roof shape