Ceiling Material | Frequency (n) | Percentage Frequency (%) |
Plastic T & J | 47 | 26.4 |
Plywood | 72 | 40.4 |
Wooden T & J | 33 | 18.5 |
POP | 13 | 7.3 |
Plaster board | 9 | 5.1 |
Plastic sheet | 3 | 1.7 |
Other | 1 | 0.6 |
Total | 178 | 100.0 |