(ShareCast News) - Commercial flooring manufacturer and distributor James Halstead said the strength of the sterling has hurt its second-half of the year.However, the group remains confident with its progress, with full-year pre-tax profits expected to be ahead of last year to their highest level in the company's history.First-half turnover was 5.7% higher than at the same time last year, but the group added it faced challenges during the second-half due to the strength of the currency.Shares in James Halstead were down 1.29% to 420.25p on 1527 BST.