Clean roof with methylated spirits and a rag. You must remove all dirt or moss otherwise it will not seal.

Seal between roof sheet and penetration with clear neutral cure roof and gutter silicone.

Work the silicone in a swirl motion to ensure it adheres to the roof sheet and the pipe.

Shape dektite flashing to suit roof sheet.

When you shape the flashing it sometimes moves the pipe which can affect the silicone seal, if necessary apply more silicone.

PHOTO MISSING - Apply a bead of silicone under the edge of the flashing where the screws are going to penetrate the roof sheet.

Screw down the flashing in even spacings, avoiding creasing the flashing and creating high spots.

Apply a bead of silicone around the edge of flashing and over screws. Work using finger in a circular motion to ensure it adheres to the surface.

Apply a bead between the pipe and the flashing rubber and work this in a circular motion to ensure adhesion.

Install weathering apron and vent cowl.

Clean any metal or pvc filings from roof.

IF YOU THINK THAT THERE’S ANY INFO MISSING THAT COULD MAKE THIS EASIER TO FOLLOW JUST CHUCK IT INTO THE MESSAGE BELOW AND WE’LL MAKE SURE WE GET THIS RUNNING AS SMOOTH AS POSSIBLE