This report presents a methodology for verifying the risk of fire propagation in combustible components installed in road tunnels. In many Nordic road tunnels combustible products are installed for reasons as drainage of water and freezing protection. These products may affect the safety in tunnels in case of fire. One part of the project was an inventory of used tests and classification systems around the world. Soon it appeared that installation of combustible material was used only in the Nordic countries and therefore the inventory was focused on these countries. Norway is the only country which has a published methodology for verifying the risk of fire propagation in combustible components installed in road tunnels. The proposed methodology in this report is based on already existing test methods. The methods are without any exceptions taken from fire tests on products and constructions used on the market for European building products. The methodology proposed follows a step like testing sequence. The first step is to evaluate if the product is non-combustible or not. If not the fire properties are evaluated and described in terms of heat release rate and smoke production rate. If the fire properties are not good enough the product can be covered with a protection and the whole construction is evaluated regarding fire resistance.