Hello. Whenever there is heavy sideways rain driven by strong wind, I can hear water dripping down from my chimney onto my gas heater. I did not remove the heater to check how much water came down, but from the sound it seemed quite random, sometimes one drop after a long while, sometimes quite a bit.
I asked a roofer who came and said there are no problems with the chimney. He said it is the chimney cap and wind-driving rain can come from the side openings. Please see the image.
It it normal for sideways rain to come in through the chimney cap? Or do I need to replace the chimney cover?
Thanks a lot for you advice.