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Do I Need Planning Permission to Install Secondary Glazing? It is possible to install secondary glazing inside the current frame to help reduce the energy costs and block out outside noise. This is ideal for period houses and listed buildings where replacing windows isn't an option. It's an excellent solution for damp buildings too However, it should only be used after other issues have been addressed to prevent draughts depriving the building of essential airflow. Do I require planning permissi