They will look over all your metal flashing the number one cause for roof leaks.
Getting a liitle water through my roof vents.
With the pipe in a vertical position trace around the pipe using a pencil.
Place a deflector over the opening of the vent to keep rain from blowing through the opening.
Minimizing water intrusion through roof vents in high wind regions.
As well check shingle integrity.
Each needs to be evaluated for risk to your home.
Position the vent pipe up to the bottom of the roof.
Go into your attic.
These professionals will inspect various other common problems that may occur as well.
The main sources of water intrusion into houses aside from floods arise from windows and doors attic vents including the ones on the roof vents on gable end walls and soffits eave and gable end wall penetrations for utilities cracks in wall siding.
But some roof air vents sit fairly flat to the roof with a mushroom style hood and unprotected sides.
To describe practices for minimizing water intrusion through roof vent systems that can lead to interior damage and mold growth in high wind regions i e greater than 90 miles per hour mph basic gust design wind speed 1.
Most air vent styles prevent direct intrusion of water.
The penetration will be oval to have a round pipe exit vertically through a pitched roof you need an oval hole in the roof.
If your roof vent leaks during heavy rain the rain may be blowing up under the hood and into the vent.