Flat & Low-Slope Roof Installation
We design and install commercial flat roof systems using TPO, EPDM, modified bitumen, and built-up roofing (BUR) materials. Each system is selected based on climate, building usage, foot traffic, and budget requirements.
Our crews are experienced with large-scale installations on warehouses, retail centers, office buildings, apartment complexes, and industrial facilities throughout San Francisco and the broader Bay Area.
Roof Repair & Emergency Response
Roof leaks don't wait for business hours. Gatana Roofing provides fast-response repair services for commercial properties experiencing active leaks, storm damage, membrane failures, flashing issues, and ponding water problems.
Our team performs targeted repairs to extend the life of your current roof system and protect your tenants and assets while you plan a longer-term solution.
Commercial Roof Inspection & Reporting
Our detailed inspection program identifies hidden defects, moisture infiltration, drainage failures, and system degradation before they become costly emergencies. We deliver written condition reports suitable for capital planning, insurance, and property transactions.
Inspections are available for pre-purchase due diligence, annual maintenance reviews, or post-storm assessments.
Roof Coatings & Waterproofing Systems
Elastomeric and silicone roof coatings are a cost-effective way to add 10–15 years to an aging roof while dramatically improving energy performance. Reflective coatings reduce cooling loads in commercial buildings — a significant advantage in Bay Area urban environments.
We also install full below-membrane waterproofing systems for plaza decks, parking structures, and below-grade construction.
Drainage & Gutter Systems
Proper drainage is the single most important factor in commercial roof longevity. Gatana Roofing installs internal drains, scuppers, overflow protection, gutters, and downspouts designed for the flow rates required on large commercial structures.
We audit existing drainage as part of every installation and repair project to ensure the new system won't fail due to underlying drainage deficiencies.
Preventive Maintenance Programs
Annual or bi-annual maintenance contracts keep your roof performing at peak condition, extend system warranties, and prevent small issues from becoming building-level emergencies. Programs include cleaning, drain clearing, sealant inspection, and detailed documentation.
Maintenance programs are available for property managers, REITs, and building owners managing multiple properties across the Bay Area.