Markit Economics released its retail purchasing managers' index (PMI) for Eurozone on Friday. Eurozone's construction purchasing managers' index (PMI) slid to 51.4 in August from 54.2 in July.
A reading above 50 indicates expansion in the sector.
Sales in Germany increased, while sales in France and Italy declined.
"There was some payback, though the PMI indices for year-on-year sales and gross margins remained close to their recent highs, pointing to solid underlying trends," an economist at Markit, Phil Smith, said.