Weight is a crucial matter in selecting the right roofing material. It determines not only the design process, but the foundational and structural decisions that follow. To be classified as a lightweight roofing material, the weight should not exceed 20Kg per square meter when fixed on the roof. Polycarbonate is a lightweight material that weighs approximately 0.9 kg/m² for twin wall polycarbonate to 12 kg/m² for solid polycarbonate, depending on the type and thickness of the sheet. Every roofing material has a corresponding weight that directly affects the timeline of the project, the efficiency, cost, and stability of the structure. Here are the advantages of lightweight roofs like polycarbonate:
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On Structural Integrity
The roof components, including the specific weight of the material, the sheathing, and other structural elements like trusses and rafters, and even additional features like solar panels, compound to a structure’s dead load, which can affect the ability of the entire structure to support its own weight over time. Heavier roofing systems may require more foundational supports and structures, and can exert more pressure on the ground, which lightweight materials are able to minimize. The significant difference in weight will help you understand the load bearing capacity of the structure, comply with local building codes, and ensure safety and security against potential structural failures.
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On Logistics
The weight of the roof is directly proportional to the cost of the whole project, as it affects other decisions that follow like soil remediation and foundational structures. Compared to other traditional roofing materials, lightweight roofs weigh 35% lower, translating to easier transportation and even faster installation of the materials. It also reduces the risk during use since it is easier to manage on site. Because it requires less heavy machinery and manpower, costs are also expected to decrease.
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On Functional Efficiency
Polycarbonate offers excellent weather resistance that does not easily brittle or break with the dynamic weather. When disaster escalates, lightweight roofs will sustain lesser damage compared to heavier weights, ensuring safety and protection all year long. Lightweight clear roofs also offer design flexibility. Aside from the aesthetic quality of transparent roofing sheets, its lightweight nature gives it the ability to accommodate different design styles like complex facades, greenhouses, and curved installation. Different profiles provide a versatile and modern approach to roofing.
Weight Matters!
One of the most common concerns in lightweight roofs like polycarbonate is its ability to withstand daily stressors from external and weather elements. However, you’ll be delighted to know that polycarbonate does not compromise on quality and functionality. Polycarbonate yields a tensile strength of 65 MPa, or approximately 9400 psi, which means that it can withstand pressure and weight with proper structure and framing. The modern shift of the construction industry to prioritize the use of lightweight materials gives way to a more sustainable and economic construction.
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