A method is proposed for fire testing of pipe insulations in full scale. The method is based on the full scale corner test method NT FIRE 025. The test material is mounted near the ceiling in the test room. The entire ceiling area is covered. No material is mounted on the walls. A propane burner has proved to be a proper ignition source. The burner is placed 1 m above the floor and when adjusted to an output of 150kW it yields a flame that impinges the ceiling over an area of about 1 m². The method allows quantitative measurements of fire growth (rate of heat release) and production of smoke. Ten products have been tested. Test results according to the proposed test method and the corresponding full scale test method have been compared. Criteria for the new method have been proposed. Three classes are defined based on rates of heat release and smoke production.