Prefabricated Panels for Self-Built House Roofs

There are numerous issues with using prefabricated panels for the roofs of self-built houses. Overall, it is not recommended as a priority choice. If economic conditions permit, it is advisable to opt for cast-in-place concrete roofing. The specific issues are as follows:

Joints Prone to Cracking and Leakage: Prefabricated panels are manufactured in blocks and then assembled by joining them together. The joints between two panels are structurally weak points. Affected by factors such as temperature changes and house settlement, cracking easily occurs at these joints, leading to widespread leakage problems. According to relevant statistics, among self-built houses with prefabricated panel roofs, 8 out of 10 experience leakage issues. This not only affects the service life of interior decorations and furniture but also brings numerous inconveniences to occupants.

Low Seismic Resistance: The connection between prefabricated panels and the main structure of the house is relatively insecure, resulting in poor overall integrity. In the event of an earthquake, their seismic performance is significantly inadequate, making it prone to panel detachment and even house collapse, among other serious consequences. Therefore, in earthquake-prone areas, the use of prefabricated panels as roof structures is strictly prohibited to ensure the safety of houses during earthquakes.

Poor Thermal Insulation: Prefabricated panels are generally about 12 centimeters thick. Although they adopt a hollow structure, their thermal insulation performance is still unsatisfactory. In summer, the indoor temperature rises significantly, making the house feel like a "steamer". It requires prolonged use of air conditioning and other cooling equipment to lower the temperature, increasing energy consumption. In winter, indoor heat easily dissipates, resulting in lower indoor temperatures. Additional heating measures, such as using heating systems, are required, increasing living costs. Usually, secondary roofing material coverage on the floor slab is needed to compensate for this defect.

Poor Sound Insulation: The material and structure of prefabricated panels determine their poor sound insulation performance. Sounds generated by normal activities of upstairs occupants, such as walking, talking, and moving furniture, can easily transmit through the prefabricated panels to the downstairs, affecting the lives and rest of downstairs occupants and reducing living comfort.

Limited Service Life: The service life of prefabricated panels is generally only about 30 years. Over time, their performance gradually declines, leading to problems such as aging and damage. Regular maintenance and replacement are required, increasing post-use costs and maintenance difficulties.