Your building’s exterior cladding does more than make the property look good. It sits between your structure and the tricky thing about cladding failure is that it almost never happens all at once. It starts quietly, in spots that are easy to overlook during a regular walkthrough. By the time something obvious shows up, like a water stain on an interior wall or a panel that is visibly warping, the damage behind the scenes has usually already grown into something much more serious and expensive to fix. Knowing what to look for early is one of the most useful things a building owner or facility manager can do.
The Joints Between Panels Are Usually the First Thing to Go
Think of the material that fills the gaps between cladding panels like the caulking around a bathtub. It’s flexible and designed to handle movement, but over time it dries out, cracks, and stops doing its job. This is called sealant breakdown, and it is typically one of the first visible signs that a cladding system is losing its ability to keep water out. The good news is that at this stage, the panels themselves are often still in fine condition, and dealing with the sealant before water gets behind it is a relatively affordable fix compared to what comes next if you wait.
Panels That Are Bowing, Shifting, or Showing Gaps
If you notice that panels are starting to bow outward, pull away from each other, or develop gaps at their edges, that is the cladding system telling you something has changed in how it is held together. This can happen because the fasteners holding the panels in place have started to corrode, because the framing behind the panels has shifted, or because thermal expansion and contraction over many years has stressed the attachment points beyond what they can handle. It can also mean that moisture has gotten into the insulation layer behind the panels and started to break it down, which changes how the system is supported. Any visible movement in a panel system is worth taking seriously and having someone look at up close.
Rust Streaks and Staining Are a Sign Water Is Already Moving
Water that gets behind cladding panels does not always cause an obvious leak right away. Instead, it works through the wall slowly, and one of the signs it leaves behind is staining on the exterior surface, often rust-colored streaks running down from panel edges or from the locations where fasteners sit. Those rust streaks mean that metal components inside the wall system are already corroding. Over time, corroding fasteners can fail entirely, and when they do, the panels they are holding can become loose or even detach. Staining is easy to overlook as a cosmetic issue, but it is worth treating as a warning sign.
White Chalky Residue on Masonry or Concrete Surfaces
For buildings where cladding sits against a masonry or concrete backing, a white powdery deposit on the surface is a condition worth paying attention to. It is called efflorescence, and while the name sounds technical, the concept is simple: water is moving through the wall and leaving mineral deposits on the surface. It is essentially the wall leaving a trail that shows you water is actively travelling through it. This is not just surface weathering, and it is worth having someone investigate where the moisture is coming from and whether the waterproofing layers behind the cladding are still doing their job.
When the Same Spot Keeps Needing Repairs
One of the clearest signs that a cladding system is in overall decline rather than just having one bad spot is when the same area keeps needing attention. If the same corner, the same panel row, or the same flashing detail has been repaired more than once in a short period of time, the root cause has probably not been properly addressed. At that point, a more thorough inspection of the full system is likely to turn up problems in other areas that have not yet made themselves visible.
What to Actually Do With What You Find
Spotting problems early only helps if something gets done with the information. That means taking photos, noting where on the building the issue is, and having a qualified contractor look at it before you decide on a course of action. What looks serious from the ground is sometimes minor up close, and what looks like nothing can sometimes be covering up significant hidden damage. The general rule is that acting early costs less, often much less, than waiting until the problem has had time to grow.
Work With a Team That Understands Commercial Cladding
At Mack Kirk, we have been helping building owners, property managers, and facility teams across British Columbia assess and address cladding concerns since 1908. Whether you have already noticed something that does not look right or you simply want a professional set of eyes on your building before problems develop, our team can give you the clarity you need to make informed decisions.
If something you’ve seen on your building doesn’t sit right, we can take a closer look and help you understand what’s actually going on before it turns into a larger repair.
