Our advice would be to get a conservatory roof specialist to visit and check out the scope of the repair work.
Plastic conservatory roof leaking.
Leaking conservatories happen for a number of reasons including a roof that hasn t been sealed properly.
The fowong butyl tape works to repair cracked roofs across multiple surfaces including metal fibreglass wood textile plastic aluminium and more.
Thoroughly clean the area and fit specialist htg adhesive flashing to bridge the problem area.
Using an inadequate sealant is one of the main causes of conservatory leaks.
Wt1 and ct1 work together to waterproof a conservatory and protect against leaks and cracks.
Leak through the roof vent.
For what it counts and based on your initial message you may not need to replace the polycarbonate just the rubber seals and maybe underside spacer strips if any.
Leak below roof vent due to failed poor mutin bar seal above or below.
Silicone sealants aren t suitable for sealing a leaking conservatory.