Abstract
A rapid non-destructive experimental method was used to assess the permeability of different brands of commercial corrugated fibercement roofing sheets. In comparison to standardized methods that take up to 24 h to complete, the proposed method allowed for air and water permeability analyses in 5 and 30 min, respectively. The air permeability coefficient of tested sheets ranged from 1.4 × 10-16 to 1.6 × 10-14 m2. The water permeability coefficient was one order of magnitude lower (2.8×10-17 to 6.6×10-16 m2), confirming the interference of hydrophobic/waterproofing components in the formulation. There was no direct relationship between sheet thickness and air or water permeation resistance.
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