Kingspan recorded a pre-tax profit of €100.4 million in the first half of the year, up almost 67% on the same period of 2014.
The insulation specialist had revenues of more than €1.23 billion in the six month period – 39% higher than a year ago.
The company was helped by rising revenues in mainland Europe and Britain, while sales volume in Ireland was also higher as the market “slowly recovers”.
Kingspan’s results were also boosted by acquisition activity, including Belgian firm Joris Ide and Canada’s Vicwest, which the new additions contributing 26% to its sales growth.
The company said it expected the gradual improvement in British and US building conditions to improve over the coming months, while the reduction in euro zone uncertainty would also help activity in Europe.