TPO Roofing in San Jose | Keith Roofing Company

TPO Roofing San Jose

TPO Roofing
Done Right Since 1952

TPO (thermoplastic polyolefin) is one of the most popular commercial flat-roof systems in the Bay Area — and for good reason. It's energy-efficient (reflective white surface meets Title 24 cool-roof requirements and substantially reduces cooling costs), puncture-resistant, heat-weldable at seams (no glue failures over time), and backed by strong manufacturer warranties up to 30 years. Keith Roofing has been installing commercial flat-roof systems since the 1960s, and we're certified installers for Carlisle SynTec Sure-Weld, GAF EverGuard, and Firestone UltraPly TPO systems.

TPO has largely replaced older BUR (built-up) and modified bitumen systems for new commercial flat-roof installation in the Bay Area. The reasons: substantially better energy performance (white membrane reflects 70%+ of solar radiation vs. 10-15% for black BUR), heat-welded seams that form continuous waterproof joints (no glue to fail), better chemical resistance, longer manufacturer warranties, and simpler long-term maintenance. For most new commercial flat-roof projects, TPO is the default recommendation.

Our TPO work covers the full range: new commercial flat-roof installation on new construction; full replacement of aging BUR, modified bitumen, or EPDM systems; overlay installation on existing sound roofs (where appropriate); commercial roof repair and seam work; and silicone coating systems as alternatives to full TPO replacement on aging commercial roofs. We work with property managers, building owners, tenants, and facilities teams across the South Bay.

TPO Roofing project by Keith Roofing Company in San Jose

Complete Guide

Understanding TPO Commercial Roofing

Why TPO Dominates Commercial Flat-Roof Work

TPO combines the benefits of EPDM (puncture resistance, flexibility) with the benefits of PVC (heat-weldable seams, reflective surface). Developed in the 1990s and maturing through the 2000s, TPO now has 25+ years of real-world performance data. Modern TPO formulations from major manufacturers (Carlisle, GAF, Firestone, Johns Manville) deliver 20-30 year warranted service life with performance that generally exceeds expectations.

The reflective white surface is a significant benefit in the Bay Area climate. California Title 24 energy code requires cool-roof compliance on most commercial re-roofs (minimum 3-year aged solar reflectance of 0.55 for low-slope roofs). White TPO meets this handily, typically with aged reflectance of 0.65-0.70. The energy benefit is real: commercial buildings with white TPO roofs experience measurably lower cooling loads, particularly during Bay Area summer afternoons.

Installation Methods: Mechanically-Fastened vs. Fully-Adhered

TPO installs in two primary methods. Mechanically-fastened systems use plates and screws through the membrane into the deck, covered by the next membrane seam. Fastening pattern varies by wind-uplift zone (interior, perimeter, corner). Mechanically-fastened is cost-effective, faster to install, and the typical choice for most commercial buildings with steel or wood decks.

Fully-adhered systems use adhesive to bond the membrane directly to the insulation or cover board substrate. More expensive and slower to install, but eliminates visible fastener points and delivers better wind-uplift performance for high-exposure buildings. Also preferred for buildings sensitive to noise (wind flapping on mechanically-fastened membrane can be audible indoors).

The Role of Insulation and Cover Board

Below the TPO membrane, proper insulation matters significantly. California Title 24 prescribes minimum R-value (typically R-25 for the Bay Area's Climate Zone 3-4), delivered through polyisocyanurate (polyiso) insulation in 1-4 inch thickness depending on existing building insulation. For retrofits, we install above-deck insulation to meet current code requirements.

Cover board (high-density polyiso, gypsum, or fiberboard) above the insulation provides puncture resistance and proper substrate for the TPO membrane. Skipping cover board is a common shortcut that reduces long-term membrane performance.

When to Consider

Signs You Need
TPO Roofing

Existing BUR or Mod-Bit at End-of-Life

Aging 1970s-90s BUR (built-up) or modified bitumen commercial roofs are candidates for TPO replacement. Typical replacement scenario when existing roof has multiple leaks, extensive deterioration, or is past 25-30 years old.

New Construction Commercial Project

New commercial, industrial, or institutional flat-roof construction. TPO is typically the default recommendation for new builds meeting Title 24 cool-roof requirements.

Energy Cost Reduction Goal

Commercial buildings with dark flat roofs (black BUR, dark mod-bit) can see meaningful cooling cost reduction from conversion to reflective white TPO. Payback period often 5-10 years on larger buildings.

Property Re-Sale Preparation

New TPO roof is significant value-add for commercial property sale. Documented installation with manufacturer warranty transferable to new owner.

Insurance Underwriting Issues

California insurance carriers are scrutinizing commercial roof condition. New TPO with documented installation often resolves coverage issues on aging buildings.

Multi-Building Property Portfolio

Property management firms with multiple Bay Area commercial buildings benefit from standardizing on TPO systems for maintenance consistency and warranty coverage.

TPO Systems

TPO Brands
We Install

Carlisle Sure-Weld TPO

Industry-leading TPO product line. 45-mil, 60-mil, 80-mil membrane options. Fleece-backed available for certain substrates. 20-30 year warranty options. Strong Bay Area distribution.

GAF EverGuard TPO

GAF's TPO line with warranties up to 30 years from certified installers. Good Bay Area service support. Various thickness and accessory options.

Firestone UltraPly TPO

Holcim-owned premium TPO with reflective white surface. 20-30 year warranty programs. Strong commercial presence.

Johns Manville TPO

Alternative TPO option with good manufacturer support and competitive pricing. Some Bay Area property managers prefer JM for multi-property standardization.

IB Roof Systems

Unique in the industry — residential TPO warranties up to lifetime. Also available for commercial applications.

Polyiso Insulation

Polyisocyanurate insulation to meet Title 24 R-value requirements. Various thicknesses and density options. Cover board (high-density polyiso, gypsum, or fiberboard) above insulation for puncture resistance.

Our Process

How We Handle
Your TPO Roofing

Existing Roof Assessment

For replacement projects: evaluation of existing roof system condition, moisture content (core samples if needed), substrate integrity, drainage performance, and structural capacity. Assessment determines whether tear-off or overlay is appropriate.

Design & System Specification

TPO thickness selection (45, 60, or 80 mil), attachment method (mechanically-fastened vs. fully-adhered), insulation R-value to meet Title 24, cover board selection, and detailed flashing design for penetrations.

Permit & Schedule

Building permit through city building department. For commercial work, Title 24 compliance documentation and energy-code review. Schedule coordination with property manager and tenants.

Installation Execution

Tear-off of existing membrane (or overlay preparation for overlay projects). Insulation installation mechanically fastened or fully adhered per spec. Cover board installation. TPO membrane installation with proper fastening pattern, heat-welded seams (hot-air welders producing 900°F+), and detailed flashing at all penetrations.

Commissioning & Warranty Registration

Manufacturer technical representative may inspect installation for warranty certification. Seam integrity testing at welded joints. Final walk-through with property owner/manager. Complete warranty registration package delivery.

Why Keith Roofing

Why Homeowners Choose Us
for TPO Roofing

Certified Multi-Manufacturer Installer

Carlisle, GAF, Firestone — we're certified for enhanced warranty programs across multiple major manufacturers. Single-manufacturer installers can't match our breadth of options for property owners who want manufacturer choice.

Title 24 Compliance Expertise

California energy code changes frequently. We stay current on Title 24 cool-roof requirements, prescriptive R-values, and alternative compliance paths. Fewer permit issues, faster approvals.

Property Manager Operational Fit

Documentation, scope clarity, tenant coordination, photo reports, warranty registration packages — standard commercial practice for us. Property management firms recommend us because we handle the non-roofing side well.

Volume + Experience Match

We complete dozens of TPO projects annually across the South Bay. Volume gives us manufacturer relationships, crew experience, and pricing competitiveness. Experience from decades of commercial work delivers quality and reliability.

Featured Project

48,000 Sq Ft Industrial Building — Full TPO Replacement

Milpitas Industrial Corridor

A 48,000 sq ft Milpitas industrial manufacturing building had a 1988 BUR roof at end of service with growing leaks over critical production areas. Property manager evaluated options: silicone coating restoration vs. full TPO replacement. Assessment found existing roof had saturated insulation in three areas and seam failures beyond coating candidacy. We specified Carlisle Sure-Weld 60-mil fleece-backed TPO, mechanically fastened over polyiso insulation to R-25 Title 24 requirement. Project executed over 3 weeks with staged scheduling to avoid production impact. Property owner received 25-year Carlisle warranty, complete documentation package for commercial property insurance, and measurable reduction in cooling costs during the following summer. Total investment ~$420K.

Common Questions

TPO Roofing
Answered

20-30 years with proper installation and maintenance. Manufacturer warranties typically 20-30 years depending on membrane thickness and certification level.

EPDM is black rubber with glued or taped seams. TPO is thermoplastic polyolefin with heat-welded seams. TPO reflects more solar radiation (energy benefit), has continuous welded seams (no glue failures), and is typical for new installations. EPDM has longer track record.

Installed cost typically $8-$14 per square foot depending on building size, system specifications, insulation requirements, and access difficulty. Larger projects benefit from economies of scale.

Sometimes. If existing BUR or mod-bit is structurally sound, dry, and without major failures, TPO overlay is often possible — saves 30-40% vs. full tear-off. We assess and recommend honestly based on existing roof condition.

California Title 24 Energy Code requires commercial low-slope re-roofs to meet minimum solar reflectance (0.55 aged for most zones). White TPO meets this easily. We handle compliance documentation for permit approval.

Yes. Property management is a significant portion of our commercial work. Scope documentation, photo reports, tenant coordination, and clean billing are standard practice.

Manufacturer warranties 20-30 years from certified installers. Extended warranties (Carlisle Golden Shield, GAF Diamond Pledge, Firestone Red Shield) available for additional cost — typically worth it for property owners planning long-term hold.

Residential Roofing

Commercial Roofing

South Bay

West Valley & Peninsula

San Jose

TPO Roofing
Done Right Since 1952

Understanding TPO Commercial Roofing

Why TPO Dominates Commercial Flat-Roof Work