You can make a hard tent rooftop shell by cutting two pieces of plywood to the following dimensions:
2 pieces for the roof, each measuring 1.8m x 1.2m (6ft x 4ft)
Then, use a waterproofing spray or sealant to treat the plywood. This will help ensure that water doesn’t seep through in the event of a downpour.
Next, use a staple gun to attach the plywood to the frame of your tent. Make sure that the plywood is pulled taut as you staple it in place.