A strong housing market across the Atlantic has boosted sales by a quarter at Wolseley, the world's largest distributor of heating and plumbing products.
The company, which has its UK headquarters in Leamington Spa, improved profits by a fifth in the five months to the end of December.
It came despite tougher conditions in the UK, although that too saw a five per cent rise in sales and marginally better profits.
Overall, Wolseley said group sales in the period - including the effect of acquisitions and before currency translations - stood 25 per cent higher with trading profits ahead 20 per cent on a year earlier.
Wolseley told investors that it was well positioned for further growth in the second half of the financial year.
It said: "Market conditions in North America are expected to remain strong for the fore-seeable future. Although the market in the UK has slowed in recent months, the group expects its UK business to continue to show modest growth."
The boost from the US reflected strong levels of activity in the housing market while commercial and industrial sectors improved.
As a result, plumbing operations pushed sales in local currency up by more than 35 per cent while profits were ahead by 30 per cent. The majority of sales growth was organic, the company added.
In the US building materials sector, Wolseley said sales were up by more than 20 per cent with trading profits ahead by 40 per cent or more.
As well as the strong trading performance, Wolseley said 22 acquisitions in the financial year to date had added around £697 million to group turnover.
They included eight deals in Europe valued at £251 million, while the highly acquisitive company had purchased five distribution businesses for £14 million since its last update in November.
Chief executive Charlie Banks added: "The acquisitions and other investments we have made position us well for further growth in the second half."
Group finance director Steve Webster said the firm was looking at more additions.
He said: "The pipeline for acquisitions is good, we have a strong cash flow and balance sheet. We are set to beat our financial year record of £500 million of acquisitions, set in 2003."
Wolseley said its French operations were undergoing a reorganisation that would incur additional costs, but there were tentative signs that sales trends were improving in the country and across Europe.
Mr Webster said: "The US economy is very strong with low interest rates, good business conditions, the housing market is strong and we are taking market share.
"Europe has been generally flat but Italy and Holland have made good progress and I see a good second half."
The group did not give actual figures in the trading statement.
It posted first-half underlying pretax profit of £308 million a year ago, and results for the six-month period to January 31 are due on March 21.
Analysts at Bridgewell Securities said that if the US momentum can be repeated in the second half then full-year numbers could rise by as much as four per cent.
The group, which was originally set up in Birmingham in 1889, generates 20 per cent of its sales from the UK, where it also runs the Plumb Centre and Pipe Centre chains.