Chimney Insulation Process Explained

Proper chimney insulation will keep the cold air out and the warm air inside. Preventing unnecessary heat loss will save power and make the heat more effective. There are many ways to insulate the inside of a chimney and you can use blankets, ready mix or a wrap kit.  Vermiculite-based insulation material can be mixed with water and poured down the chimney. It is easy to purchase a chimney liner and insulation kit, and the job will not be too messy or time-consuming. Read on for tips to ensure that your project is successful.

Get a Helper

An assistant can be handy when reading instructions, picking up heavy objects, helping at the other side of the chimney and cleaning up the mess. Once the insulation liner has been assembled, you will need to tie a rope to the top of the liner, hoist it into the chimney and hold the top steady. Your assistant needs to pull the rope from other end to avoid the liner touching sides or damaging the chimney. While the chimney insulation liner is traveling down the chimney, you can communicate with the assistant to avoid damaging the liner and they can be your eyes at the bottom.

Keep Insulating

Before beginning chimney insulation, check the rest of the house to ensure that no drafts or cold air is creeping in through pipes, windows, doors and crawl spaces. Any other gaps will affect the effectiveness of the insulation that you are adding down the chimney.

Measure Properly

When the liner is taken out the package, you must add 1 extra foot of liner to the height of the chimney from top to bottom. Once you have cut these dimensions, wrap the insulation can be wrapped around the chimney foil-side down. Make sure that you have double-checked measurements before you cut.

One Tape Per Foot of Insulation Fabric

Use foil tape to tape the insulation seem, 1 piece of tape per foot of insulation fabric. Afterwards, wrap the liner and insulation in mesh. Keep this part of the process as neat as possible.

Caulk the Crown, Brick the Bottom

With the assistant keeping the liner stable at the bottom, spread caulk around the chimney crown. The chimney plate is at the top of the liner in the caulk before being secured to the top plate. Clamp it into position where the wind will not blow it away. The bottom of the chimney insulation should connect the fireplace snout to the rest of the fireplace. This connection will be secured with a metal band, tar or bricks as it will keep the chimney secure and insulated.