Conestoga wagons had a roof made with canvas. The canvas was supported with a wooden frame and suspension and both were made with wood. The covers were arched and were usually white.
Reeds or wattle and mud, with thatched grasses for the roof
A Conestoga or covered wagon
The Boer ox wagon in Afrikaans kakebeen WA was build locally by various wagon builders called wamakers
canvas
A pageant wagon is a movable stage or cart used in the mystery and miracle play cycles of the 10th through the 16th Century. An example of one of these plays would be the Wakefield Mystery Plays.
Roof
Roof racks are generally adjustable - they're not exclusive to one make of car. If they were - manufacturers would be forced to make a different model for each car.
Roof trusses are used to support the roof and to make certain that the weight of the roof is distributed equally across the building for maximum support.
People going west used the covered wagon.
She had no wagon. She walked.
From the top down... canvas was used for the wagon sheet. The bows were a steamed wood strip, with the front and rear bows being occasionally replaced with a wagon rim, the steel band around the outside
chuck wagon
The sunroof motor on a Mitsubishi Space Wagon is located at the rear of the sunroof, in a sealed housing. It allows the roof to be opened and closed via a button on the console.
"A station wagon is considered such if the roof fully extends past the back of the car, to create a fifth door to serve as trunk space, to be loaded through the tailgate."
Slate rock is normally used for roof tiles etc.
Basically to make them water proof and long-lasting.
thomas fall was the inventer of the covered wagon