Prefabricated Roof Panels for Rural Self-Built Houses

There are both advantages and disadvantages to using prefabricated roof panels for rural self-built houses. If economic conditions permit, it is recommended to use cast-in-place concrete for roof construction.

Advantages

• Low cost and fast construction speed: Prefabricated panels are relatively inexpensive, making them a cost-effective option for rural self-built houses. Moreover, their construction efficiency is extremely high, with hoisting work being completed in just a day or half a day, significantly shortening the construction period and quickly providing a foundation for subsequent decoration work.

Disadvantages

• Poor safety: Prefabricated panels are supported on both sides by walls. Even if a ring beam is poured, their overall integrity is not as good as that of a structure where the ring beam and floor slab are poured together. When subjected to external forces, such as slight shaking, there is a possibility of the panels falling off. Especially in earthquake-prone areas, due to their low seismic resistance, they are prone to causing house collapse under earthquake action, seriously threatening the lives of occupants.
• Prominent waterproofing issues: The gaps between prefabricated panels are particularly prone to cracking, leading to water leakage. When waterproofing is applied, the probability of rain leakage is high. Even the waterproofing industry cannot guarantee 100% waterproofing, with data indicating that 8 out of 10 houses with prefabricated panel roofs experience rain leakage.
• Poor sound insulation and thermal insulation: The sound insulation effect of prefabricated panels is poor, with activities of occupants on the upper floor being clearly audible to those on the lower floor, affecting the privacy and comfort of living. At the same time, their thermal insulation performance is also poor, with high indoor temperatures in summer and low indoor temperatures in winter. Generally, secondary roofing material coverage is required on the floor slab to improve thermal insulation conditions.
• Limited service life: The service life of prefabricated panels is typically only 30 years, which is relatively short compared to some other roofing materials. Frequent maintenance or replacement may be required in the later stages.