Drone aerial inspection of a commercial roof and building envelope

Independent Roof & Building Envelope Services

Northlines provides independent inspection, diagnostic, and consulting services for commercial and residential properties. Our work is focused on identifying conditions, documenting findings, and providing clear, evidence-based information to support informed property decisions.

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Property Due Diligence & Consulting

Independent roof and building-envelope assessments for property owners, buyers, investors, lenders, attorneys, and other professionals making informed property decisions.

Forensic Roof & Leak Investigations

Detailed investigation and documentation of roof leaks, storm-related damage, installation concerns, and other conditions requiring a deeper technical evaluation.

Roof & Building Envelope Inspections

Independent evaluations for commercial and residential properties, including roof condition, leak investigation, storm-related concerns, and building-envelope issues.

Drone & Aerial Inspections

Aerial documentation of roofs and properties to help evaluate difficult-to-access areas, overall conditions, and areas requiring closer investigation.

Storm & Damage Documentation

Documentation of roof and building conditions related to hail, wind, storms, and other reported damage, with clear photographic and written findings.

Residential Roof Inspections

Independent residential roof inspections for property owners, buyers, and other professionals needing a clear assessment of roof condition, leaks, installation concerns, or other roofing issues.

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Explore Our Inspection Services

Roof & Building Envelope Inspections


Independent assessments of roofing systems and building-envelope conditions for commercial and residential properties.

Forensic Roof & Leak Investigations


Independent investigation of leaks, water intrusion, and related roofing or building-envelope conditions.

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Submit the form to outline your objectives, and a consultant will respond promptly to discuss how our expertise can advance your goals.