#15. The going rate is 8-10 euro for slabing and 14-15 euro for skimming this is per sheet of plasterboard if you allow 30 euro per insulated board that add up to 55 euro per board which is equal to 2.8 m2 so the cost of dry lining and skimming per metre is 19.50 per m2 labour and materials.#16.400kevin Registered User. The going rate is 8-10 euro for slabing and 14-15 euro for skimming this is per sheet of plasterboard if you allow 30 euro per insulated board that add up to 55 euro per board which is equal to 2.8 m2 so the cost of dry lining and skimming per metre is 19.50 per m2 labour and materials.