HeatShield® Chimney Flue Repair System
HeatShield® gives you the option to restore your chimney’s clay flue liner rather than rebuilding or relining it entirely. When the clay liner in older chimneys cracks, smoke, embers, carbon monoxide, and even fire can seep through the liner into the ceilings and attic space of your home. The consequences can be devastating. Luckily, HeatShield® can work to protect and restore your old clay liner so that you don’t have to replace your entire chimney liner with a costly stainless steel liner.
Does Your Chimney Need HeatShield®?
To determine whether or not HeatShield® is a good solution for your chimney’s damaged liner, have a certified chimney inspector provide you with a thorough inspection that includes the use of a camera to closely inspect the existing liner. If your chimney has any of the following problems, it may benefit from HeatShield®’s chimney repair and resurfacing system:
- Deteriorated mortar between clay flue liners
- Cracked clay liners or flue tiles
- Spalled or eroded clay flue liners or tiles
- Gaps and holes between flue tiles
How HeatShield® Works
HeatShield® restores the integrity of your chimney flue liner so that it can vent hazardous gases out of your home the way your chimney is supposed to do. To repair chimney interiors, one of two methods is used. The Joint Repair System is used for chimneys that only require repair of defective mortar joints, while the Resurfacing System is used to repair mortar joints and other minor defects in tile-lined flues.
Did You Know?
“Problems such as gaps, cracks, and spalling in your chimney’s flue can present serious risks to your home and family, because your chimney can no longer perform its intended function, which is to safely contain and vent the products of combustion to the outside of your home.” — Chimney Safety Institute of America
HeatShield® Resurfacing System
For chimneys with cracked or spalled flues that are otherwise sound, the HeatShield® Resurfacing System is used to apply a coating over the entire flue. Cameras are used to verify repairs. To restore your chimney’s flue by resurfacing the interior, a custom-made foam applicator plug is placed at the bottom of the flue and attached to a winch on top of the chimney. First, a “tie coat” material is applied to the flue walls as the plug is pulled upward by the winch. The “tie coat” cleans any remaining dust in your flue and acts as a primer for the HeatShield® Cerfractory® Flue Sealant. After the tie coat dries, the HeatShield® material is then applied onto the flue at a thickness of about ¼” with the foam plug as it is pulled upward by the winch. This unique application method is known as “slip casting” or “slip cast extrusion.” Your installer will then verify that your newly-restored chimney is completely sealed and smoke-tight by video scanning your completed repair.
HeatShield® Joint Repair
With HeatShield®’s patent-pending Joint Repair system your chimney is fixed right the first time. First a special foam applicator blade is custom made to fit your chimney. The applicator tool and blade are then plunged down your chimney and positioned below each gap or void. The HeatShield® Cerfractory® Flue Sealant mixture is added. Each void in your flue is filled as HeatShield® mixture is extruded into the void by the tool. Your repaired void is then made smooth as the blade passes over the filled void as the tool is pulled upward. Your repair is then immediately scanned with a specially designed video camera attached to the bottom of the tool. Your professional HeatShield® Installer then verifies that each gap or void has been properly repaired as it is immediately viewed on the cameras monitor.
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