TPO Commercial Roof Replacement in San Diego, CA
4410 Federal Boulevard, San Diego, CA 92102
Multi-Tenant Commercial Retail Building
Project Overview
About This Project
This commercial property experienced chronic water intrusion across multiple tenant suites despite numerous repair attempts. The aging modified bitumen system exhibited seam separation, membrane shrinkage, and flashing fatigue around parapet walls. Winter storms triggered ceiling leaks in two separate units, with complaints increasing over time. A comprehensive inspection confirmed that localized repairs would not resolve widespread deterioration. The property owner approved full replacement to eliminate leak risks and install a modern TPO waterproof system designed for long-term commercial performance.
Initial Assessment
Conditions Found
- Widespread membrane cracking from UV and thermal stress
- Open seams allowing moisture penetration during rain events
- Multiple failed patch areas losing adhesion
- Blistering caused by trapped moisture beneath the membrane
- Parapet wall flashing deterioration and fatigue
- Insulation saturation in several areas
- Drainage slope inconsistencies causing minor ponding
What We Used
Materials
- TPO single-ply membrane
- Tapered rigid insulation boards
- Heat-welded seaming materials
- Parapet wall flashing system
- Drain integration components
How It Was Done
Installation Process
Every project follows a structured, supervised process — from site assessment to final walkthrough.
Outcomes
Project Results
- Continuous waterproof membrane eliminating all active leak sources
- Improved drainage slope reducing ponding risk
- New insulation layer improving building energy performance
- Reduced emergency service costs and interior damage risk
- Long-term structural protection for all tenant spaces
Get Started
Request Your Free
Roof Inspection
A licensed inspector examines your roof and delivers a written report with photos. Most estimates back within 24 hours of the visit — no pressure, no obligation.
- Free inspection — no cost, no obligation
- Written estimate before any work begins
- In-house crews only — no subcontractors
- Licensed & insured (CSLB Lic# 1094851)
- Owens Corning Preferred Contractor
- Manufacturer + workmanship warranties