Building protection in our century is very important because of terrorist attacks. Old buildings in Europe are not enough strong against blast loads. Nowadays, we know many different explosives and their effects on walls and human bodies. Detonations caused by blast effect provoke building damage and fragmentation effects. The explosion causes damages and next parts of bricks and fragments produce other secondary damages in other buildings and human bodies. New possibilities to improve the resistance of buildings against blast effects need to be found. It requires effectively thin and strong materials to reinforce the walls of a building. New materials innovated by material science can be a good solution for this project. These materials are usually composites like syntactic foams, spherical shells or carbon fields reinforced composites. In the last century designed, old, maybe world heritage or critical infrastructure buildings, used sometimes for public service offices, were planned without the calculation of special shock load. It is impossible to protect these buildings thanks to new curtain construction without changes in the city landscape. New materials, absorbing high-energy can be useful for increasing the defence capabilities of these buildings. New composites and metal foams innovated by material science would be suitable.