The First Step to Take When You Notice a Roof Leak

Discovering a commercial roof leak demands immediate, systematic action. Here's the right sequence — and why it matters.

Step 1: Protect Interior Contents

Before anything else: protect what's inside. Move equipment, cover inventory, place buckets under active drips, and document the leak and any interior damage with photos. If the building has insurance, this documentation supports claims. Acting fast here prevents expensive interior damage from compounding.

Step 2: Apply a Temporary Fix on the Roof

Get on the roof as soon as safely possible and apply compatible lap sealant, temporary patch material, or tarps over the apparent breach area. You may not find the exact entry point on a first pass — water travels laterally — but covering the most likely area helps. This buys time for a proper assessment.

Step 3: Schedule a Professional Inspection Promptly

Don't wait. Every day water sits in insulation, the moisture spreads — converting what might be a restorable situation into one that requires more extensive (and expensive) remediation. Schedule a professional inspection with core samples within 1–2 weeks of discovering the leak.

Step 4: Get Data Before Making Decisions

Do not accept any restoration or replacement recommendation without core sample data. The inspection will tell you the moisture extent and determine whether restoration or replacement is the right path. Making a major roofing decision based on visual assessment alone is a mistake.

Step 5: Act on the Inspection Results

With objective data in hand, choose the right solution — restoration if moisture is below 25%, replacement if above — and move forward with a qualified contractor.