What are the reasons for a vent skylight leaking rain?

Ventilation skylights are increasingly being installed on factory buildings and other structures. What's the deal when these installed skylights leak rain during cloudy and rainy weather? Let's discuss this with you. The reasons for the leakage of ventilation skylights mainly include the following aspects:

A ventilation skylight manufacturer's defect caused the issue during the process.

Ventilation skylight attachments caused by the transportation composition resulted in damage.

The issue is due to the installation not being carried out according to the strict procedures during the installation process.

The waterproof sealant used in the waterproofing process was of poor quality, resulting in inadequate waterproofing.

If roof ventilation leaks causing rain is not a single factor, but a comprehensive one, it must be investigated item by item to be eliminated.