Installation steps of roof hatch.

Installation step Reinforcing keel:

on the light steel keel ceiling, two auxiliary keels are horizontally added to form an opening matching the size of the manhole. Fix the frame: put the frame of the manhole into the opening and fix it on the keel with self-tapping screws to ensure it is flat and firm.

Install the cover plate: embed the cover plate into the frame and check whether it opens and closes smoothly; Some products adopt magnetic attraction, pressing or locking structure.

Sealing and waterproofing (especially for roofs): Direct method is adopted: the manhole leads directly from the roof, and the waterproof layer is overlapped;

Or adopt the concealment method: the interface is waterproof and then hidden in the ventilation pipe. Finishing treatment: if it is a gypsum manhole, it can be sprayed with latex paint together with ceiling; If ceramic tile is pasted, it needs to be measured, cut and pasted with strong ceramic tile adhesive in advance.