My chimney leaks badly during heavy rain. I've been unable to find a person who can tell me how to fix it.
Since I have unvented gas logs, I had the top of the chimney sealed. It's therefore not leaking from the top. Since I can't find the leak, is there a product on the market that can be painted or sprayed to match the outside of the chimney, and that can prevent leaking? If not, do you have other suggestions? I have also thought of covering the chimney with some kind of cement, or with a prefab chimney. Please help! Thanks.