If your garage floor already has cracks in it, you might be wondering: will those show through a new coating, or does the coating hide them for good? The honest answer is — it depends on how the crack is handled before we ever coat over it.
What Is Telegraphing?
In this industry, we call it “telegraphing” when an underlying crack or flaw in the concrete becomes visible again through the coating over time — sometimes months later. It happens because a coating is flexible only to a point. If the crack underneath is still active — meaning the slab is still shifting slightly — that movement can eventually transfer up through the coating.
This is different from a crack that’s stable and simply cosmetic. Not every crack is a long-term risk, but not every crack should just be coated over and ignored either.\
How We Handle Cracks Before Coating
Before we coat any floor, we inspect every crack individually.
Hairline cosmetic cracks get filled and leveled as part of standard prep.
Cracks showing signs of ongoing movement — active settling, for example — get treated differently, often with a flexible crack filler designed to move with the slab instead of fighting against it, or a conversation about what’s causing the movement before anything goes on top.
This is the difference between a coating that hides a crack for a season and one that holds up over the life of the floor. A contractor who fills every crack the same way, regardless of cause, is setting you up for that crack to reappear.
The Bottom Line
Visible cracking in your garage or basement floor isn’t a reason to rule out coating — it’s a reason to get it properly assessed first.
That’s exactly what our free inspection covers before we ever talk about color or finish.