The skylight shaft is the structure made of lumber and drywall that connects the skylight on the roof with the opening in the ceiling.
So one great advantage of a tubular skylight is that is comes with its own shaft—the tube. The tube is typically the same type of foil-wrapped coil that you would use for dryer vents, except in a super-sized version.
Another advantage of tubular skylights is that this tube is bendable. Attics often have obstructions that make it difficult, if not impossible, to construct a conventional skylight shaft. The tube section of the tubular skylight lets you snake around these obstructions.
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