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3. Longevity of Roofs Heat reflective sheets can also contribute to the longevity of roofing systems. By reducing the thermal expansion and contraction that roofs experience due to temperature fluctuations, these materials help prevent cracking and other forms of damage, ultimately prolonging the lifespan of the roof.
The location of a sewer manhole must be carefully considered to ensure that the drainage system is effective and easy to maintain.[14][15] According to design standards, the distance between two manholes is typically between 7 and 20 meters, depending on the specific characteristics of the project.[16][17] In cities, the distance is 20 meters per manhole,[18] while in industrial or commercial settings it is 10-15 meters per manhole.[19][20] The distance between manholes in homes or restaurants is typically 7-10 meters.