4 Tips for Installing a Chimney Liner Kit

If you find yourself using your fireplace frequently, a chimney liner kit is likely in your best interest. You might be installing it for the first time or reinstalling in the case of a liner that is no longer intact. In either case, chimney liners keep creosote from building up in your chimney. Without them, you run the risk of having a fire hazard in your home. There are a few things that are helpful to know when installing a chimney liner kit. 

Know What to Measure 

To establish what the maximum size (you want the largest diameter liner your chimney can allow to get the best draft for your chimney) is for the replacement liner you will need, take some measurements. Go up on your roof and measure the dimensions of the inside of the flue opening that is currently in place. To determine what length of liner you will need if it is for a fireplace chimney, measure from the top of the chimney to the top of the smoke chamber. Also measure the height and width of the fireplace opening. Take note of the measurements and talk to a professional about the best size kit for you.

If it is a woodstove that you are relining for, measure from the top of the chimney down to where the stove will be hooked up. Measure the inner dimension of the exhaust on the woodstove as well. That dimension will be the size liner you will use. 

Know How to get Past the Damper Housing 

You can get past the damper housing in two ways. The first is to convert from round liner to oval liner at the damper housing and then go back to round at the stove. However, this can make cleaning the chimney more complicated and it can be more costly because it requires adaptors and oval pipe. The other method, which is preferred, is to cut the damper housing to keep the same diameter lining from the stove to the top of the chimney. Cleaning is easier when you cut the damper housing because you don’t have to move the stove to do it. 

Work Around Too Much Pitch 

If you’ve got a steep pitch, it will be difficult to stand on it in order to install the chimney liner kit. You’ll have to build a staging platform to stand on. You’ll want to be very confident in your building abilities before taking on this task. The other option is to rent or buy one from a reputable company. One attained from a professional chimney company will be safe and easy to install. It can be expensive but your safety is more important than a few extra dollars. 

Insulate the Liner 

You’ll need fireproof type of insulation to fill any spaces between the chimney and the chimney liner. Insulation will permit the liner to fully heat up, thus maintaining good draft and guarding against soot deposits. You can pour a mixture of vermiculite and concrete down the chimney gaps, letting it fill in the spaces between the chimney and the chimney liner.