Most chimneys with a wood burning fireplace, are lined with terracotta clay flue tiles. These tiles are susceptible to deterioration or cracking. Such tile damage can occur simply by typical weathering from water penetration or by a sudden occurrence. Weathering by water can cause washed out tile joints between the tiles in the chimney. Sudden Occurrences range anywhere from lighting strike, chimney fires or rapid heating of the liner (done by burning paper). These situations with your tiles compromise the integrity and safety of the lining system within your chimney. This is because when you light a fire, the cracks and gaps allow smoke, heat and dangerous gases to escape the liner causing potential health and fire hazards.
As stated in the 2018 International Residential Code as well as the National Fire Protection Association 211 (NFPA); Each fireplace whether it be gas, or wood burning, must have an "intact" lining system. If a lining system is compromised, a reline or repair is required.
* current Minnesota Residential Chimney Code (codes listed in the 2018 IRC or NFPA 211 may not apply to MN current code standards)
Relining a chimney with a Stainless Steel Liner:
Stainless steel chimney liners are UL 1777 listed as a replacement lining system of a solid fuel burning appliance. They have a lifetime warranty and hold up to the corrosive elements found in creosote. We insulate the liner with a "cerwool" blanket to promote better drafting and more efficient heating. Replacing a lining system with terracotta clay tiles is still an option however is less cost effective due to the labor required to complete this type of repair.
The Installation of a Stainless Steel Liner:
We begin with an accurate measurement of the fireplace opening to properly size the liner needed. This will help ensure proper draft when using the fireplace. A liner too small can cause smoking issues. We begin the installation by shattering and the removal of all the existing clay tiles. We then insulate the stainless steel liner and insert it into the chimney. Once inserted we secure and seal the liner in place by parging the bottom with high temp refractory cement such as Chamber Tech 2000. For cosmetic reasons we terminate the liner at the top with a clay tile. Once done we install a stainless steel chimney cap to prevent animals, rain or snow from entering the chimney.
Repairing a liner with HeatShield:
HeatShield offers us the opportunity potentially repair a chimney's lining system more affordably. HeatShield is a "cerfractory" sealant that can withstand temperatures in excess of 2900 degrees F. This material allows us to restore a chimney liner by filling gaps or resurfacing any cracks or spalling within the terracotta clay tiles. It is installed by using a custom "foam cut" applicator which helps to smooth the cerfractory sealant into the gaps or damaged tiles. This comes with a 20 year warranty allowing you to enjoy your fireplace for the duration of your home ownership.