Smoke exhaust ventilator is installed on the building roof and it is a key part of the roof system. Its waterproof performance, ventilation and smoke exhaust performance, and lighting performance will obviously affect the performance of the entire building. Especially waterproof performance is the top priority. Is the smoke exhaust ventilator able to prevent water leakage? What kind of skylight can eliminate leakage? Both the owner and the general contractor concern about this issue. Because if there is water leakage in the skylight, it will have a bad impact on the owner's later production and operation, and even cause the suspension of production! The performance of the smoke exhaust ventilator depends on the material selection and process technology of the smoke vent skylights.

The waterproof method is the key of smoke vent rooflight, which can be divided into two types:

1. Traditional smoke exhaust ventilator use glue-like substances (usually silica gel) to bond the relevant gaps and prevent rainwater from entering the room through the gaps;

2. The "nail-free, glue-free, structural waterproofing" technology prevent water enter into room through its own structure, and do not need glue to bond any gaps to block water.

Smoke ventilator usually use broken bridge aluminum alloy profiles with thermal insulation properties. "Broken bridge aluminum profile" is an integrated profile composed of inner and outer aluminum profiles and heat insulation strips.