Stone veneer typically falls off due to moisture problems, improper installation, or a failed bond between the stone and the wall surface. When water gets trapped behind the veneer, it can weaken the mortar or adhesive over time, causing pieces to loosen and eventually fall.
Common causes include:
- Missing or improperly installed moisture barrier behind the veneer
- Poor drainage, allowing water to collect instead of escaping
- Incorrect mortar mix or application during the original installation
- Freeze-thaw cycles that expand trapped moisture and weaken the bond, especially relevant in Utah’s climate
- Age and natural wear, especially if the veneer wasn’t sealed or maintained properly
If stone veneer keeps failing in the same area, it’s usually a sign of an underlying moisture issue rather than a one-time installation mistake. Simply reattaching the loose stones without addressing the root cause often leads to the same problem happening again.
A professional inspection can identify if water is getting trapped behind the veneer and determine if repairs need to include fixing the moisture barrier or drainage system, not just reattaching the stone.