Here are the summary of advantages and disadvantages of Precrafted Housing:
Advantages of Precrafted housing
- Self-supporting ready-made components are used, so the need for formwork, shuttering and scaffolding is greatly reduced.
- Construction time is reduced and buildings are completed sooner, allowing an earlier return of the capital invested.
- On-site construction and congestion is minimized.
- Quality control can be easier in a factory assembly line setting than a construction site setting.
- Prefabrication can be located where skilled labor is more readily available and costs of labor, power, materials, space and overheads are lower.
- Time spent in bad weather or hazardous environments at the construction site is minimized.
- Less waste may occur
- Advanced materials such as sandwich-structured composite can be easily used, improving thermal and sound insulation and air tightness
Disadvantages of Precrafted housing
- Careful handling of prefabricated components such as concrete panels or steel and glass panels is required.
- Attention has to be paid to the strength and corrosion-resistance of the joining of prefabricated sections to avoid failure of the joint.
- Similarly, leaks can form at joints in prefabricated components.
- Transportation costs may be higher for voluminous prefabricated sections than for the materials of which they are made, which can often be packed more efficiently.
- Large prefabricated sections require heavy-duty cranes and precision measurement and handling to place in position.
- Larger groups of buildings from the same type of prefabricated elements tend to look drab and monotonous.
- Local jobs may be lost, if the work done to fabricate the components being located in a place far away from the place of construction. This means that there are less locals working on any construction project at any time, because fabrication is outsourced.
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