Chimney Restoration & Repair

Fire Guard Chimney Repair | Guardian Chimney Liner Restoration

Chimney Repair

Historically, the only available method to repair defective or deteriorated mortar joints between flue liners in a masonry chimney was to reline the flue. Using the FireGuard ceramic sealant, the need to reline the chimney is negated, saving time and expense.

Misaligned Flue Liner

Gaps Between Flue Liners

Misaligned Flue Liner

The Problem

During original construction, it is not uncommon for masons to improperly align the flue liners or neglect to fill the joints between the flue liners with the appropriate refractory mortar. As stated in The BOCA National Mechanical Code, M-1207.2.1 Fire-Clay flue liner: “The fire-clay flue liner shall be installed ahead of construction of the chimney as the chimney is carried up and carefully bedded one on the other in an approved medium-duty refractory mortar, with close joints left smooth on the inside.” Even if the mason filled the joint with mortar, it most likely was the same mortar used to lay the brick, block or stone, which is not an approved refractory. In fact, standard mortar has almost no refractory properties. Standard mortar in the joints of flue liners cannot withstand the adverse conditions present within a chimney environment. The result of using standard mortar is rapid deterioration of the joint, ultimately leaving dangerous openings between the flue liners.

The Danger of the Problem

The results of these improper practices are dangerous openings within the flue area. These openings allow flammable creosote (by-products from wood combustion) to build-up between the outside of the flue lining and the inside of the chimney casing. Should these flammable deposits ignite, the heat and quite possibly the flame could transmit to the dwelling. As recommended by the National Fire Protection Agency 211 - Standard for Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances, “If the flue liner in a chimney has softened, cracked or otherwise deteriorated so that it no longer has the continued ability to contain the products of combustion (i.e., heat, moisture, creosote, and flue gases), it shall be either removed and replaced, repaired, or relined.” In the past, relining was the only option . Now, you and your chimney professional have a viable, safe alternative - FireGuard ceramic sealant; it is the most cost effective product addressing dangerous gaps between flue.

Closed-Cell applicator with vibrator	Closed-Cell applicator being installed through clean-out door opening
Preparing to mix FireGuard material	Winch with cable to applicator
Winch with cable to applicator	Fireguard as it approaches a deteriorated mortar joint
View of FireGuard on the exterior of a flue liner as the as the FireGuard seeps through the joint	Heater setting the ceramic compounds in FireGuard
Completed FireGuard installation

The Solution

The FireGuard ceramic sealant is a high-duty, refractory mortar specifically designed to correct open mortar joints, thus negating the need to reline the flue. The 3,200 degree service temperature far exceeds the requirements for residential chimneys. Applied by chimney professionals, the unique FireGuard material forms solid, smooth, water and acid resistant joints throughout the entire flue area. Once properly installed, the new FireGuard joints prevent the passage of flammable creosote through the joints, thus preventing the build-up of flammable creosote outside the flue area. In addition, the new FireGuard joints reduce heat transfer through the joints to the interior wall against the dwelling. Under normal operation of a masonry chimney, FireGuard is guaranteed not to loosen or dislodge from the joint(s) for a period of twenty years (please see your chimney professional for details).

Why FireGuard?:

Cost
The FireGuard process costs substantially less than traditional relining; in some instances as much as 50% less.

Safety
The FireGuard process is in full compliance with standard building codes. In fact, the FireGuard material far exceeds the service temperature requirements for residential applications.

Convenience
The majority of the FireGuard process is usually completed within a single day, with much less disturbance to the inside of the home since the flue liners do not require removal.

Performance
The FireGuard process does not appreciably decrease the area of the original flue; therefore, the performance of the fireplace or appliance should not change.

Durability
The FireGuard material improves the durability of the vitreous clay flue liners comprising your flue.

Guarantee
The FireGuard material is guaranteed for twenty years not to fail (please see your chimney professional for details).

History
The FireGuard process was developed by Firesafe Industries, a company special- izing in chimney restoration products and processes for over 45 years.

Fire Guard Chimney Repair | Guardian Chimney Liner Restoration
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Chimney Restoration

Overview
The revolutionary Guardian Chimney Liner® is the safest and most effective way of relining masonry chimneys. Using the "cast-in-place" technique, the Guardian system actually eliminates the need to tear down and rebuild an existing chimney, resulting in substantial savings.

How it Works
Poured into place within an existing chimney, the Guardian mixture hardens to form an extremely durable seal between hot flue gases and the masonry walls. The Guardian Chimney Liner® is designed to withstand extremely high temperatures without cracking or breaking down. It is an excellent insulator against excessive and dangerous heat transfer from the chimney to the surrounding structure. In fact, test results prove that the Guardian system is a better insulator than any other kind of flue liner of its kind. This system also retards the absorption of condensation and the buildup of dangerous and flammable creosote within the chimney flue.

Additional Benefits
As the Guardian mixture is poured into place, it fills in all cracks, crevices, and pores in the existing flue area. This tight, virtually perfect seal helps prevent the leakage of any toxic flue gases into the living area. This seal also fills and reinforces brick joints in the chimney structure, locking them into place and strengthening the entire chimney. Additionally, this lining material is highly resistant to damage caused by the natural "freeze-thaw" cycle which is responsible for much of the damage to highways, bridges, and similar structures. In fact, laboratory tests revealed no evidence of surface deterioration when subjected to these extremes.

Versatile and Durable
The Guardian Chimney Liner® is ideal for use with almost every form of heating appliance, whether it burns wood, coal, gas, or oil. The liner is poured to precise specifications so that the actual finished flue is properly sized for the individual heating appliance. A Guardian liner makes your chimney safer, more efficient, and extremely resistant to corrosion and deterioration. You simply cannot buy anything better to safeguard your chimney.

The Guardian System also allows you to safely create two or more flues within one large chimney space, eliminating the need to vent two heating appliances into the same flue.

The revolutionary Guardian Chimney Liner® is the safest and most effective way of relining masonry chimneys. Using the "cast-in-place" technique, the Guardian system actually eliminates the need to tear down and rebuild an existing chimney, resulting in substantial savings.

Installation Procedure

1. The chimney is first inspected and cleaned using standard chimney sweep procedures and equipment. Chimneys that have suffered fire damage often have cracked or broken tiles, similar to those at right.
   
   
   
2. All lower openings in the chimney structure are closed off and any weak areas in the chimney are braced. All of the existing tiles are then removed from the chimney, ensuring a large cavity in which to size and pour the new liner.
   
   
   
3. Next, an inflatable rubber former is inserted into the chimney cavity, centered with spacers to ensure proper flue wall thickness, even along offsets or bends within the flue path.
   
   
   
   
4. The Guardian mixture is prepared on site by simply adding water. The mixture is then poured into the chimney from the top so that it flows around the form, between it and the chimney wall, filling the entire cavity.
   
   
   
5. When the Guardian mixture hardens, the former is deflated and removed, leaving a smooth, round, efficient flue passage. The new Guardian liner even shields the walls of the chimney's smoke chamber.
   
   
   
   
6. Finally, the top of the chimney is finished off with a crown. With proper maintenance, your Guardian Chimney Liner® will provide many years of service.
   

Typical Installations for Fireplace and Freestanding Appliance Chimneys

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