Tag Archives: Rampart General

3 Issues with Rampart General Pre-Cast Chimneys

Photo credit D. Feb
Photo credit D. Feb

Imagine this scenario: You have spent a great deal of time looking for that perfect home. You did your due diligence. You had the proper home inspections and then made the single most expensive investment of your life. After moving in, you decide to get the chimney inspected and swept. The chimney sweep comes in and, within just a few minutes, has discovered that your chimney is a Rampart General Pre-Cast system.  And, because of a major defect, the system can never be used.  Because most home inspectors don’t have specific training in this system, they oftentimes don’t recognize the potential issues inherent with this type of chimney.

Unfortunately, this scenario happens all too often.

What is a Rampart General Pre-Cast Chimney?

Rampart General is the name of the manufacturer of the chimney system. Hence the nickname for these systems is “Ramparts.”

Pre-Cast describes how the chimney was made. The system was manufactured in Santa Ana, California from a cast or a mold, with a Rampart General chimney on side of housecombination of calcium aluminate cement and lightweight aggregate. The cast was cured and then transported to various parts of California.

At the construction site for the home, a concrete pad was poured. The transport truck simply tilted the chimney into place by using a heavy chain and t-bar down the inside of the chimney. Some chimney professionals refer to these systems as “tilt-ups” for that reason. In some cases, the truck dropped the chimney while placing it on the pad, resulting in damage to the system.

The mold or cast for the chimney structure was designed to make the chimney appear that it was constructed with bricks and mortar. To the untrained eye, the system appears to be a normal masonry system. We have found that some home inspectors who are not familiar with this system will call the system out as a masonry system but in fact, it’s anything but.

How to Identify a Rampart General Pre-Cast System

These systems are located in developments throughout California. Ramparts can be found in homes constructed anywhere from the mid-1960s to the early 1990s.

The chimneys (with few exceptions) will look like an off-white color brick. Some homeowners may think it’s a painted brick but in fact it’s the color of the calcium aluminate cement. If it’s a different color than the off-white, someone has painted the chimney.

The chimneys (with few exceptions) will be located on an exterior wall of the home. That’s because the chimney was tilted up into place.

In many cases, the exterior chimney appears to have a very narrow chimney above the shoulders of the chimney, much narrower than a masonry chimney.

These systems can be found primarily in Southern California as well as throughout California and may be found in other states as well. In San Diego County, we have found patches of them in Imperial Beach, Chula Vista, Paradise Hills, Spring Valley, Lemon Grove, El Cajon, Fletcher Hills, San Carlos, Del Cerro, Santee, Tierrasanta, Scripps Ranch, Mira Mesa, Rancho Penasquitos, San Marcos, Escondido, Oceanside, Encinitas, Carlsbad and Leucadia.

Here’s a local news report about these damaged systems.

Problems with Rampart General Pre-Cast Systems

There are three major irreparable problems with these systems:

Insulation Plate

The primary problem is the potential for having cracks in the insulation plate, also referred to as the breast plate, which is located directly above the opening inside the firebox.

Cracked insulation plate in a Rampart General Pre-Cast Chimney
Looking up from the fireplace, here’s a crack in the breast plate

If the insulation plate is cracked, there is no approved repair and the system SHOULD ABSOLUTELY NOT be used due to the high risk of a fire between the chimney structure and the home. Stove inserts (gas, wood, or pellet) or gas logs should not be installed, and there is no approved repair.

In the almost two decades following our training in Rampart General Pre-Cast systems, we have found that approximately 60% of the systems that we have inspected here in San Diego had a cracked insulation plate.

Even hairline cracks in the insulation plate are dangerous because they will widen or expand with heat, and then allow this heat to transfer through the cracks to combustible materials used in construction around the fireplace.

According to Dale Feb of Fireplace Investigation, Research & Education Service, the leading expert in the country for this system, “Based on the manufacturers’ specifications, the ICBO evaluation report and the acceptance by the local building official of these two documents, we are not allowed to deviate from the construction, installation or repair requirements stated within these written details.”

In other words, repairs such as patching, relining, or stove inserts are not viable solutions to repair Rampart General Pre-Cast systems. These chimneys were UL-Listed and approved in their original design and no modifications are permitted.  Relining or installing a stove insert would be considered a modification and therefore would not be approved under the UL listing.

Most manufactuers of stove inserts specifically state that they cannot be installed into a fireplace or chimney system that is damaged. This is yet another reason why stove inserts cannot be installed into a Rampart.

No repairs have been approved by the manufacturer or by the Superior and Municipal Courts of California who have made rulings in cases involving Rampart General Pre-Cast systems.

Unfortunately, Rampart General, the company that constructed these chimney systems is now out of business so there is no recourse against the manufacturer.

Cracks in Chimney Structure

Extensive cracks in a Rampart General Pre-Cast chimney systemThe second issue that we find is the exterior chimney structure will often be cracked as well. These cracks appear as long, deep, wide vertical cracks in the exterior chimney structure. They appear along where the reinforcement (rebar) steel is located within the structure. These cracks are not subject to patching and eventually, the chimney will lose its structural integrity.

We are now finding that the cracks are becoming so long, deep and wide, that the chimney is literally falling apart.  In this case, we recommend tearing down the entire chimney in order to avoid damage or injury due to falling concrete.

Damaged Flue Lining

The third issue that we are finding with some Rampart General Pre-Cast systems

Collapsed flue tile in Rampart General Pre-Cast system
The flue tile collapsed during the manufacturing process

here in San Diego is that the flue lining can be damaged or cracked. The flue lining is the passageway inside the chimney structure.

Since the chimney was constructed horizontally in a cast or mold, sometimes the cast failed to contain the concrete during the construction process, and “blew out” the flue tile.  This creates a concrete blob inside the flue lining which makes the fireplace system completely unusable.

Because the system cannot be relined nor a stove insert installed, the chimney can no longer be used.

Repairing a Rampart General Pre-Cast System

According to Rampart General, the manufacturer, systems with cracked insulation plates are not subject to patching.

There are some chimney companies that are using Thermocrete, a ceramic coating, to cover over the cracked insulation plate.  I contacted Approved Industries, the manufacturer of Thermocrete, to find out if their product can be used for this purpose.  Approved Industries stated emphatically that Thermocrete CANNOT be used for damaged insulation plates in Rampart General Pre-Cast systems.  Thermocrete is not U.L. approved for this repair as well as the Rampart General system has no U.L. listing for Thermocrete as a repair.  As stated above, no repairs have been approved by Rampart General, nor by the Superior and Municipal Courts of California who have made rulings in cases involving these chimney systems.

Do not allow anyone to talk you into any repairs of these conditions or resolve the problem by installing a stove insert into the chimney. This could result in a potentially dangerous fire and, since the chimney system was modified against the U.L. listing, there is a possibility that your insurance company would not honor a claim for any resulting fire to your home.

In conclusion….

Whenever you purchase a home, always have a separate Level 2 Chimney InspectionTo find a qualified chimney sweep, go through the Chimney Safety Institute of America. If you are buying a home with a Rampart General Pre-cast system, the question to ask your home inspector or chimney professional is if they have been specifically trained in these chimney systems by Dale Feb, the leading expert in the country on Ramparts. Not all home inspectors and not all chimney professionals have this specific training and therefore will not know about these systems.

For further information, please refer to Dale Feb of Fireplace Investigation, Research & Education (F.I.R.E) Services. Here is a link to his extremely well written and in-depth publication about Rampart General precast systems.