Cool roofs can be created through a bright-colored coating or reflective tiles. Traditionally, a cool roof is a flat roof with a coating that goes over the top of the existing roof. However, even a steep tiled roof can be made cool by using reflective shingles.
Disadvantages of green roofs:
Despite the undeniable benefits, some disadvantages to green roofs should be taken into account before installing them.
Maintenance costs: Compared with conventional roofs, they entail greater costs in their execution and maintenance.
Increased weight on the structure: Not all buildings are suitable for these systems, given the extra weight on top of the structure.
Water filtration due to rainwater retention: The installation of green roofs requires specialist professionals who know exactly how to design the space and the irrigation and drainage systems.
It then requires a good design to prevent, among others, the accumulation of rainwater under the structure that could lead to dampness and filtrations.
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