Notre Dame: how is the reconstruction of the cathedral

The reconstruction of the ceiling of Notre Dame Cathedral, destroyed by a fire on April 15, makes debate among the architects on the material to use, some preferring wood and others a steel frame.

The architect Barbara Schock-Werner, German coordinator of the reconstruction badistance of the Cathedral of Our Lady, has ruled in favor of a steel frame for the roof, " for security reasons, "he told the DPA.

However, "in France, they think that a wooden roof would be better for reasons of weight," explained the German architect, who pointed out that the steel structure "is much lighter because it uses less material ".

But he warned that "this can cause damage to the masonry, so it would have to introduce an extra weight that suits the building," said the architect and art historian.

"It could be such a concrete cover, like the one incorporated in the San Esteban Cathedral in Vienna after World War II," he said.