Yes, the payment exceeding Rs.20,000 made to a supplier for shuttering materials on rent for the construction of a building roof is subject to tax deduction at source under the provisions of Section 194C of the Income Tax Act of India. This payment would be categorized as "Payments to Contractors/Sub-contractors for Work Contracts" and would be subject to a TDS rate of 1% for individual or HUF payers, and 2% for other payers.