There are several steps you can take to prepare for a new chimney liner installation, helping make the process faster, smoother, and more cost-effective. You may need a new chimney liner for several reasons, including improving the safety of an aging or leaking chimney, resizing the flue to meet the requirements of a new woodstove insert, or replacing an existing liner damaged by corrosion and normal wear. With careful planning and preparation, your chimney liner installation can be completed efficiently while minimizing unnecessary costs.
If you think you may need a new chimney liner, the first step should be to have a qualified chimney professional inspect your existing system. A professional can identify problems with your current liner and recommend the appropriate solution, which may include installing a new chimney liner. They can also suggest ways to improve the overall performance and efficiency of your chimney system, such as installing a woodstove insert or choosing a properly sized liner to improve chimney draft.
If you have determined that a new chimney liner is necessary, you should thoroughly clean your chimney, fireplace, or woodstove before installation begins. If you have the appropriate equipment, are comfortable working at heights, and are prepared for the mess, you may be able to clean the system yourself. However, having a professional chimney sweep perform the cleaning beforehand can be a better option. A professional can identify potential structural problems and address them before the liner is installed, while also providing a more thorough cleaning of the entire chimney system.
Before installing your new chimney liner, make sure you know exactly what type of liner you need for your specific application. If you are installing a new woodstove insert, for example, follow the appliance manufacturer’s specifications for the required chimney liner diameter and material. Different appliances can have different venting requirements. A wood-burning appliance may require a different stainless steel alloy than a high-efficiency gas or oil-burning furnace, so selecting the appropriate liner material is an important part of the planning process.
Take accurate measurements to ensure you purchase the correct liner size for your chimney. The liner should extend from the top of the chimney to the damper throat or other appropriate connection point at the bottom of the flue. You should also measure the inside diameter of the existing flue to confirm that the required liner will fit properly. Be sure to account for the space needed for proper chimney liner insulation. If the required liner is too large to fit inside the existing flue, you may need to have a qualified mason remove the existing clay liner tiles to create enough room for the new liner.
As you prepare for your new chimney liner installation, be realistic about which parts of the project you can safely handle yourself and which tasks should be left to qualified professionals. A properly installed chimney liner can improve your home’s safety and energy efficiency, while an incorrectly installed liner can create serious safety risks. If you are unfamiliar with building and fire safety requirements or do not have experience working with chimney systems, hiring a qualified chimney professional to handle most or all of the installation may be a worthwhile investment.