Intermsofreplacementsteelwindows,hot-rolledgalvanisedsteel
sectionsdonotlendthemselveswelltotheproductionofmade-to-measure
steelwindows.Also,steelwindowshavenotbeensuitable(indomestic
sizes)fordoubleglazingunits,althoughsteelwindowswhichcantake
widerairspacedoublegazingunitsarenowavailable.Polyesterpowder
factory-appliedcoatingswhichovercometheproblemsofsitepaintingof
galvanisedsteel,andtheregularrepaintingthatwasneeded,arenowthe
normalfinishforsteelwindows.