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"And a window that looks out on Corcovado. Oh, how lovely." Tom Jobim's lyrics, immortalized by João Gilberto and Astrud Gilberto's voices and a soft guitar, was one of the early songs that introduced the world to the idea of a paradisaical Rio de Janeiro and a promising Brazil, with an increasingly urban population and a modern capital being built from nothing. Almost 60 years later, Paulo Mendes da Rocha casually quotes this song in an interview and points out that for him, in this scene, the most important element is the window, not Corcovado or Christ the Redeemer. That's because it frames the view and directs our eyes to what matters. It is a phrase that goes almost unnoticed, but that carries enormous poetic and artistic significance to the craft of architecture.

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Every child has drawn a house. Perhaps a sunny day with some clouds, a leafy tree, a family with a dog, low wooden fences, or even a car. But in these drawings, they will almost certainly draw a simple rectangle with a gable or hip roof. This archetype of the house appears in virtually all cultures, and even today many architects use it for contemporary projects.

In addition to the primary function of draining rainwater and snow, and thus protecting the building from the weather, roofs can be an important aesthetic device for composing a project. In modern architecture, waterproof roof slabs emerged as a popular alternative, but sloping roofs have continued to captivate both clients and architects. In this article, we will cover the various types of roofs and, more specifically, the manufacturing process and characteristics of natural slate tiles.

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