Operating profits at the firm also went up by 8% to €67.4m in the year-ending 31 December.
The specialist insulation and steel decking manufacturer achieved stability across the UK, with overall group sales up 3%.
Gene Murtagh, chief executive of Kingspan said: “The return of stability was a key theme in 2010 with Kingspan recording an increase in both sales and profits for the first time in three years.
For the UK insulation business, he said: “We believe that the 2010 trends will continue into 2011, with an increase in upgrading activity in both domestic and non-domestic, aided by the forthcoming “Green Deal” in the UK.
“Commercial construction activity is not expected to return to growth before 2012”, he warned.
He added that UK sales of insulated board remained flat largely due to a weak banking sector, but Kingspan hoped future sales growth would be driven by the surge in retail superstore building.