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    Common materials used for heat insulation roof sheets include polyurethane, polystyrene, and fiberglass, each offering different levels of insulation and durability. The choice of material often depends on the specific climatic conditions, the building's design, and budget considerations.


    3. Roof Penetration Flashing This type is crucial around vents, chimneys, and skylights. Proper installation of penetration flashing is vital to prevent leaks around these vulnerable areas.


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