THE PENGUIN REPORT - The 5 EIFS Failures I See Over and Over in Mississippi
Most EIFS failures are not product failures. They’re install, design, or maintenance problems that got ignored until the wall started rotting.
I’ve been crawling around buildings in Mississippi for two decades looking at exterior cladding.
EIFS, stucco, fiber cement, AWB, ACM, stone veneer, if it’s bolted, glued, or troweled to the outside of a building, I’ve inspected it, sold it, installed it, or fought with somebody about why it failed.
And here’s the thing.
Ninety five percent of the EIFS failures I get called out for are not the system’s fault.
They’re install failures. Or design failures. Or maintenance failures dressed up as system failures so somebody can blame the manufacturer and dodge a lawsuit.
Let’s get into the five I see the most.
If you own a commercial building with EIFS in Mississippi, or you’re a GC, architect, or property manager who works on them, there’s a good chance at least one of these is happening to you right now.
This Substack is reader-supported. To receive new posts and support my work, consider becoming a free or paid subscriber.
1. Kickout flashings that don’t exist
No surprises here. This is a classic.
You have a roof line that meets a wall, which is a pretty common detail on buildings and homes. The code and every EIFS manufacturer’s spec say you need a kickout flashing right there.
A kickout flashing is a piece of metal or vinyl shaped to catch water running down the roof and send it straight into the gutter.
It’s a key part of any flashing setup across all kinds of exterior cladding systems. So just to be clear, kickout flashings at these locations are not optional, and there is no approved workaround from any manufacturer.
I’m being conservative here, but I’d say at least half the buildings I inspect are missing at least one kickout flashing, or they were never there to begin with.
Why? Anybody’s guess. Maybe the contractor skipped them. Maybe they got removed during a roof or gutter repair and never put back. Or my favorite, the homeowner didn’t like the way they looked and cut them off. Yikes.
So why does this matter?
When water runs down the roof and hits the wall, if it’s not kicked out into the gutter, it travels along the wall, finds that gap where the roof meets the wall, and starts working its way inside behind the EIFS, soaking the sheathing and creating a perfect place for mold and rot.
You usually will not notice it right away. It quietly causes trouble for two to five years, sometimes longer.
By the time you see it, the sheathing has turned to mush, the studs are rotted and have made friends with a bunch of fungi, and you’re staring at thousands in repairs. All because a thirty dollar part got left out.
2. Sealant joints nobody ever maintained
Here’s another big ticket item that comes down to something simple.
Anywhere EIFS meets a dissimilar material, windows, doors, flashings, hose bibs, you name it, you need a proper sealant joint.
That’s not a suggestion.
That’s in every manufacturer’s spec. And yet people act like EIFS is some magical maintenance free system. It’s not.
Those sealant joints around every window, door, pipe, and expansion joint have a lifespan. Most sealants last about seven to fifteen years, depending on the product, the sun, and whether they were ever installed correctly in the first place.
Here’s what I see all the time.
I show up to a twenty year old EIFS building and find the original sealant still hanging on, cracked, brittle, and peeling away from the wall.
That tells me two things right off the bat. The owner has not touched a maintenance program, and there’s water sneaking in behind the cladding somewhere. Guaranteed.
If you own property, having a scheduled maintenance program is not just nice to have, it’s essential if you want to protect your investment. And if you own EIFS, that program needs to include annual inspections of every sealant joint and replacement before they fail. Ignore them, and the repair bill will make you wish you hadn’t.
3. Terminations tight to a dissimilar surface
EIFS needs to terminate properly. Above grade. Above roofs. Above decks. Around windows. Around doors. Everywhere.
These terminations should have a back wrapped edge and, when needed, a proper sealant joint.
What I see instead is EIFS installed tight right to a deck surface, right onto the roof, right against the window or door, or right into the dirt.
No termination. No flashing. That causes all kinds of problems. For one, EIFS is not meant to seal those connections. And for another, the system has no room to move.
Walls move through the heating and cooling of the day. That’s thermal expansion and contraction.
The building gets a little bigger in the heat of the day and a little smaller in the cool of the night. The movement is small, but over the span of a wall it adds up, and that movement has to go somewhere.
If everything is tight together, where does it happen? At a point that was not designed to move, which causes cracks and buckling. If the sealant joints and clearances were there, the sealant could stretch or compress and handle that movement.
How does this happen? This one is definitely an installation error, and usually it comes from an inexperienced tradesman.
4. Window installations done in the wrong order
The window has to be flashed and integrated with the air and water barrier before the EIFS goes on.
Pan flashing at the sill. Jamb flashing tied into the WRB. Head flashing tied in above. Then EIFS.
What actually happens on a lot of jobs is this.
Framers set the windows. The EIFS contractor shows up. EIFS goes around the window. Sealant gets shot at the perimeter. Done.
No pan flashing. No proper integration. The window is now a funnel pointing straight into your wall cavity.
It’s almost never visible from the outside. You usually have to remove panels to see it. By then, the damage is done.
Most of the time, flashings get left out because different trades think it belongs to somebody else. The window guy thinks the EIFS guy should install the head flashing. Maybe the person doing the AVB should handle it. But the EIFS and AVB guys think the window guy should do it. Next thing you know, nobody picked it up and the install keeps moving without it.
5. The wrong attachment method used
This one drives me up a wall.
EIFS, like any cladding, attaches to the wall. The method depends on the substrate the EIFS is going over.
Some substrates can be adhesively attached because the facing material is compatible with the EIFS manufacturer’s approved adhesives. In other cases, when a substrate does not allow adhesive application, mechanical fasteners with a manufacturer approved washer have to be used.
Adhesives are specially designed and tested by the manufacturer to make sure they are compatible.
Using the wrong adhesive can hurt the system by failing to bond to the substrate or by damaging the EIFS itself. Cement based adhesives do not bond to wood substrates, and solvent based adhesives can dissolve the EIFS foam board.
Needless to say, if you’re using adhesive application, it has to be the right adhesive. Period.
If the substrate has issues accepting adhesive, mechanical fasteners get used.
Common reasons for mechanical fasteners are a substrate covered with building paper or sheathing with an incompatible surface, like a factory applied AVB. There are specific washers installed in a specific pattern that make that method work.
What is not approved, and what I still see way too often, is roofing button caps and nails. That is wrong on so many levels, and it will fail. It’s just a matter of time.
If you do not know what you have on your building, get an inspection from somebody who actually knows the difference. There are not many of us in this state.
What to do about it
If you own or manage a commercial building with EIFS in Mississippi, the cheapest move you will ever make is a baseline inspection.
You find out what is actually on your wall, where the failures are, and what the maintenance cycle should look like.
From there, sealant maintenance and small repairs cost a fraction of what it costs to wait until water gets behind the system and rots out the structure.
If you’ve got EIFS on a building and nobody has looked at it closely in years, that’s where I’d start.
A lot of these failures are cheap to catch and expensive to ignore.
The Penguin Report is where I write all about exterior cladding, bad installs, code failures, litigation lessons, and what is actually keeping water out of your building. If this is your world, subscribe and stick around.
