(Reuters) - Britain's SIG Plc expects underlying profit for the year to be below market forecast hurt by subdued demand from ongoing softness in the building and construction sector, the building materials supplier said on Monday.

The company, which sells roofing and insulation materials in Britain and some European countries, now expects underlying operating profit to be in the range of 20 million pounds to 30 million pounds ($25.3 million-$37.9 million), compared to analysts' expectations of 41.1 million pounds.

($1 = 0.7906 pounds)

(Reporting by Radhika Anilkumar in Bengaluru; Editing by Eileen Soreng)