A dimensional analysis on firebrand penetration through a mesh screen was carried out to correlate the experimental data previously reported in the literature. Three dimensionless variables, one dimensionless time and two dimensionless lengths, were obtained. The resulting dimensionless parameters correlated the data well and may provide a useful framework to assess firebrand penetration through mesh screens, a significant problem associated with the ignition of interior contents of built structures in wild-land-urban interface fires. Published by Elsevier Ltd.