Profile: Malbrook Conservatories Ltd. offers conservatories, orangeries, roof lanterns, or other garden buildings. We also design, manufacture & install folding sliding doors using hardwood and double glazed units. These can be used externally or internally with flush or weather proof track. Flush mounted drop bolts, both keyed and non-keyed, secure the doors firmly in place, while allowing finger tip control to open up some or all of the doors as required.