Stucco-covered chimneys make me nervous. This all started about five years ago when one of our past clients asked us to buy him a new $20k chimney, claiming we had missed a major issue with the chimney.
This was a 1920s two-story stucco home with a stucco-covered chimney at the front of the house. The upper portion of the chimney had been recently worked on, and it all looked very good.
Coming down the chimney, however, there were a few cracks and damaged areas in the stucco covering that would obviously admit water.
We took photos of the cracks, we put these photos in our home inspection report, and we recommended having the stucco repaired.
This house had a lot of serious issues, and the stucco damage at the chimney was probably one of the least concerns for our client, so nothing was done about it for a while. Our client purchased the home, and eventually had a stucco contractor come out to see about fixing the damaged stucco at the chimney. This was about six months after taking possession of the home.
The stucco contractor who came out told our client that the stucco couldn't be repaired, because the chimney was falling apart behind the stucco. What our client needed, apparently, was a complete chimney tear-down and rebuild. Our client contacted a few different chimney contractors for bids, and those bids were all in the neighborhood of $20k to rebuild the chimney.
Ouch. The worst part was that one of these contractors told him that his home inspector should have caught this. They told him that all stucco-covered chimneys of this age are falling apart and will be expensive to rebuild, and we should have known this.
So that's when he called me. I followed up with a few of my own contractors to discuss the repair options and to learn more about stucco-covered chimneys. They agreed that these chimneys, typically found on homes built in the 1920s and 1930s, can be problematic. They're not all bad, but when they start to fall apart, it's an expensive project.
The problem
The issue with these old stucco-covered chimneys is that they were typically built with sand-lime bricks that don't hold up over time when exposed to water. The stucco walls were supposed to protect the bricks, but once you have chimneys leaking water from the top, that water starts to destroy the chimney on the inside. It takes a long time for this to happen, but these chimneys were built a long time ago. That brings us to present-day, where we're starting to see the results of this damage throughout the Twin Cities.
The chimneys we're looking out for are stucco-covered chimneys on homes built during the 1920s and 1930s. The photos below show some examples of these chimneys.
For this first one, the upper portion of the chimney was rebuilt with concrete blocks.
This next one, which we like to call a Neopolitan chimney, also had some repairs completed. These repairs were only temporary.
This next chimney will be needing repairs very soon.
And I don't think the rest of these stucco-covered chimneys need any explanation.
If a stucco-covered chimney is in pristine condition and there are no signs of water intrusion, wonderful. We're good. But when a stucco-covered chimney shows signs of past water intrusion, experience has taught us that these issues can be expensive.
