Determine whether the pilaster is moisture-resistant, by checking the packaging or consulting with the manufacturer. Install only moisture-resistant pilasters for exterior decorating. Not doing so can result in premature deterioration.
Determine whether the pilaster -- if it is wooden -- is termite-resistant, by checking the packaging or consulting with the manufacturer. Install only termite-resistant wooden pilasters for exterior decorating.
Determine whether the pilaster is rot-resistant, by checking the packaging or consulting with the manufacturer.
Check the back of the pilaster, to see if it has been reinforced with steel. Consult the packaging or the manufacturer, to determine what strength of steel was used to reinforce the pilaster.