The other week I had a fire going in my family room fireplace. Shortly after starting the fire, I noticed the smoke was backing up in the chimney - and the whole downstairs was quickly flooded with smoke. This is the second time in a year this has happened. After the 1st time, we suspected it might be a negative pressure situation, so I have been sure to crack a nearby window every time I start a fire ... guess that doesn't help.
I decided to have a CSIA certified chimeny sweep come out to clean the chimney and inspect the chimney for safety. He offered to install two caps on my chimney (on the fireplace and furnace crowns), which I had him do. He though the smoke backup was probably caused by blowing winds, and said the caps may help that problem. He gauged the clearance and height of the chimney, and said it was up to code and that probably wasn't the cause of the smoke backup.
Now here's the real issue: During the course of the inspection, he noted that the crown on the chimney was crumbling (which I knew about already). He also noted that there were gaps between the chimney flue and the firebox, where the box narrows into the chimney. The gaps are not holes, but it's clear there is some masonry which is either rough, or crumbling.
The chimney sweep (also a fireman for a local FD) made it sound as if this was a potentially severe problem, and recommended that I not use the fireplace until getting it fixed. Of course, he had a solution ready to go: to use some product called "Smoketite" to seal the gaps. Cost $500.
I hate getting inspections and repairs from the same people, as the potential for abuse and fraud is too great. Does anyone know if this truly is a problem or, better yet, if the repair he's suggesting is worth the $500. Being the holidays, cash is very tight ... but I really enjoy my fires this time of year.
Any insight appreciated !