To do a chimney renovation successfully, you need to have a thorough understanding of your home’s foundation, frame, wiring, and plumbing, as well as all local residential codes.
Even if you think you are good to go as far as building codes and are sure that you will not damage any electrical wiring or plumbing, there are still a couple of points you must consider.
First, improper installation of a chimney can not only leave cracks through which fire can escape which would require filling cracks, but errant smoke and other toxins will eventually manifest themselves in the form of CARBON MONOXIDE POISONING!
The other central point is that many DIY projects get abandoned midway once the person realizes it is not as easy as initially thought. If this is the case, the cost of hiring a professional mid-project to come in, clean up your mess, and start over from scratch, possibly having to do extra work caused by damage in your DIY project, will far exceed the cost of hiring a professional initially. In some extreme cases, aborted DIY attempts can make the area unworkable, leaving you in a real bind.
Being accurate is especially important if you’ve failed to plan or measure something essential, like a load bearing wall or modifications to your roof. If you install an important feature with the wrong dimensions, it can lead to a number of issues, and you guessed it—additional homeowners insurance claims. For example, say you replace your roof, and a few shingles don’t quite sit flush with the frame of the house. After a major rainstorm, you may notice there is water damage and mold in the attic space. You can file a home insurance claim for the water damage, but when the insurance company finds out you made a mistake with the roof repair, your claim will be denied.