To build a lean to conservatory, you should first of all mark the ground with correct measurements where the conservatory will be built. Position the outer cills of the conservatory so that the frame starts to take shape. With the correct measurements, the cills and the dwarf walls will match. Then secure the remaining frames to the structure that is in place and also secure the doors to the relevant frames. The hip bars and any roof ridge components are then attached above the frames. Glazing should then be carried out on the roof. Then, clip the down pipe systems and the guttering to the roof.