Commercial Leak Detection

Signs of a Concealed Leak

Slow leaks show themselves indirectly, usually in the same handful of ways.

• Ceiling or wall stains that reappear after being painted
• A persistent musty odor in one area
• Unexplained increases in water consumption
• Efflorescence or white mineral deposits on masonry and slabs
• Warped flooring or lifting base trim
• Condensation and rust on mechanical equipment
• Tenant complaints about humidity in one suite

Any of these justify investigation before finishes are repaired again.

How Concealed Leaks Are Found

The point of detection work is to find the source with the least possible demolition.

• Moisture meters to map the wet area and its edges
• Thermal imaging to spot temperature differences behind finishes
• Acoustic equipment to listen for pressurized line leaks
• Pressure testing of supply and fire protection lines
• Tracer methods for roofs and below-grade assemblies
• Targeted inspection openings only where the evidence points

Once the source is known, the work moves to repair and, where materials are already wet, drying.

Common Sources in Commercial Buildings

In commercial properties the usual suspects are predictable.

• Roof membranes, flashings, drains and penetrations
• Domestic water risers inside shafts and chases
• HVAC condensate lines and drain pans
• Chilled water and hydronic piping
• Fire sprinkler lines and fittings
• Slab penetrations and below-grade waterproofing
• Window, curtain wall and envelope joints

A leak in any of these can travel a long way before it appears, so the visible stain is rarely above the actual failure.

Common Questions

How much damage can a slow leak cause?

A leak running for months can rot framing, corrode fasteners, ruin insulation and grow mold across a large area, all before anyone sees water.

Will insurance cover a long-term leak?

Often not. Most commercial policies cover sudden, accidental releases, and exclude damage from gradual, long-term seepage. This is why early detection matters financially.

Can we find a leak without opening walls?

Usually the area can be narrowed to a small zone with meters and imaging, so any opening is small and deliberate.

How often should a building be checked?

Roofs and mechanical spaces are worth inspecting twice a year, and after any major storm.