If you have hot and cold rooms in your house, your duct-work might be leaking
Heating duct-work is an unseen part of your home but it has a great impact on the comfort level and temperature of your home. If your duct-work leaks air then you are not getting maximum airflow to all parts of your house. This can lead to some rooms being noticeably colder than others in the winter or hotter than others in the summer. An even bigger issue, though, is the extra energy costs and the energy loss that occurs with leaky duct-work.
You can check your heating duct-work for leakage in a couple of different ways. The most common method is to measure the airflow with a Whole House Diagnostic to see just how much air is making it from the furnace out through the ducts. In older homes, it is not unusual to find that as much as 40% of heated and cooled air is lost through leaky duct-work. That is a huge number and one that makes going back and re-sealing duct-work seem appealing. The difficult part is how to go about accessing the duct-work in order to seal it. After all, it is located behind finished walls and is not readily accessible.
There are two primary ways of sealing leaky duct-work. The first way is the most expensive way - cutting through drywall to expose the duct-work and tape the joints securely. Many homeowners believe that sealing up leaky ducts with duct tape is a simple solution to their problems. However, this is not a good choice for sealing duct-work because it does not seal tightly enough.
The second way to seal leaky duct-work is to higher a professional company to spray Aeroseal sealant into the duct-work. This method is quicker and easier than cutting through your drywall, and you don't have to go back and do drywall repairs afterwards. Regardless of the method you choose, properly sealed heating duct-work is one of the best things you can do for your home. It will keep you more comfortable in your home and save you money on energy.