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I have to change my roof that is fiber cement (with a slope less than 20% and insulation under glass wool roof). At first I intended to replace it with a tiled roof, but the structure of the house does not allow me. I am offered two solutions: the insulated steel tray in 4 or 8 cm and the shingle. What do you think of these products? Are they good acoustic insulators?

It is very curious that you are offered these two solutions in equivalence. The steel tanks are self-supporting elements that integrate a thermal insulation (polyurethane foam), possibly reinforced acoustically. Shingles are a thin bituminous layer laid flat support (usually a panel) involving reported insulation.

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