Commercial Flat Roof Replacement

& Re-Roofing

Commercial flat roof replacement for offices, retail buildings, and light industrial facilities. We install TPO roof replacement, EPDM roof replacement, and modified bitumen systems with employee-based crews.

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What Is Commercial Flat Roof Replacement?

Commercial flat roof replacement means removing your existing membrane system and installing a new TPO, EPDM, or modified bitumen roof. This differs from patching isolated damage or coating an existing system.

Flat roof membrane replacement addresses problems that repairs can't fix: saturated insulation, widespread membrane failures, or systems at the end of their design life. The work involves tear-off, deck inspection, insulation replacement if needed, and installation of a complete new membrane system.

We plan commercial roof replacement projects around your operations. Phasing breaks the work into sections so tenants, inventory, and equipment stay protected. Off-hours scheduling minimizes disruption during business days.

When commercial flat roof replacement makes sense:

Membrane age exceeds 20-25 years

Multiple leak locations across different roof sections

Saturated insulation layers underneath the membrane

Widespread blistering, cracking, or membrane separation

Repeat repairs that only buy short-term relief

Commercial Flat Roof Repair

Flat Roof Materials Overview

Who We Serve

Office & Mixed-Use Buildings

Commercial flat roofing replacement planned around tenant schedules and parking access. We coordinate with property managers on timing, noise restrictions, and elevator use for material delivery.

Retail & Light Industrial

Flat roof replacement services that protect inventory and keep loading docks operational. Staging areas positioned to avoid forklifts and delivery trucks. Section-by-section work keeps your facility running.

Churches & Community Buildings

Budget-conscious commercial roof replacement with board approval timelines in mind. Seasonal scheduling to avoid key events and fundraising periods. Clear proposals that explain scope and phasing.

HOA & Condo Associations

Resident communication plans included. Board-ready proposals with timeline breakdowns. Shared-space protection during flat roof replacement commercial projects. Parking and access coordination for minimal disruption.

What Flat Roof Systems Do We Install?

Three main membrane systems handle commercial flat roof replacement. Each has different installation methods and cost considerations.

TPO (Thermoplastic Polyolefin)

White or light-gray membrane that reflects heat. Seams are heat-welded, creating watertight bonds. TPO roof replacement works well for buildings focused on energy efficiency and cooling cost reduction.

Good fit when: Reducing cooling loads matters, roof has good drainage, and building codes allow single-ply membranes.

EPDM (Rubber Membrane)

Black rubber membrane with proven durability across temperature extremes. Seams are adhesive or tape-bonded. EPDM roof replacement is common on older commercial buildings upgrading from built-up systems.

Good fit when: Initial cost is a priority, building has adequate insulation, and cooling loads aren't a primary concern.

Modified Bitumen

Multi-ply system with a granulated cap sheet. Installed with torch-down or cold-adhesive methods. Modified bitumen roof replacement handles high-traffic roofs and areas with equipment.

Good fit when: Roof accessibility for maintenance is frequent, and you need a system that tolerates foot traffic and equipment placement.

Flat Roof Materials Guide

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How Does Commercial Flat Roof Replacement Work?

Flat roof replacement commercial projects follow a structured sequence that minimizes disruption and ensures quality results.

Step 1: Inspection & Roof Report

On-roof inspection with photos, moisture scanning, and drainage assessment. We document all penetrations, flashing conditions, and edge details. Report includes membrane condition, insulation status, and replacement vs repair recommendation.

Step 2: Repair vs Replacement Recommendation

If isolated damage exists and the membrane has useful life remaining, commercial flat roof repair makes more sense. When widespread failures appear or insulation is saturated, full replacement delivers better long-term value.

Step 3: Proposal & Phasing Plan

Detailed scope with membrane system specs, square footage, tear-off requirements, and phasing by building section. Timeline accounts for business hours, weather windows, and building access constraints.

Step 4: Installation & Site Management

Section-by-section tear-off and installation. Daily site cleanup and material staging away from entries and parking. Communication with property managers on progress and any deck repairs identified during tear-off.

Step 5: Final Walk-Through & Maintenance Plan

Complete punch-list inspection with property manager. Maintenance schedule recommendations and warranty documentation. Annual inspection cadence to catch small

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When Should You Repair vs Replace a Flat Roof?

When Repairs Work

Isolated damage from equipment installation or storm impact. Membrane has 5-10 years of expected life remaining. Insulation layers are dry with no saturation. Small leak sources that haven't spread across multiple roof sections.

In these cases, commercial flat roof repair addresses the problem without full replacement cost.

When Replacement Is Smarter

Widespread membrane failures across multiple building sections. Saturated insulation underneath the membrane. Recurring leaks in different locations that require constant patching. Systems that have reached or exceeded their 20-25 year design life.

Full commercial flat roof replacement eliminates underlying problems that repairs can't fix. You get a new warranty period and eliminate the maintenance cycle of constant patching.

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What Affects Commercial Flat Roof Replacement Cost?

Roof size & access → Square footage drives material quantities. Multi-story buildings need crane rental or rooftop material delivery. Tight urban sites with limited staging areas add complexity.

System choice → TPO and EPDM single-ply systems cost less per square foot than multi-ply modified bitumen. Material thickness and reinforcement layers affect pricing within each system type.

Tear-off vs overlay → Complete tear-off costs more but ensures dry insulation and solid deck. Overlay saves tear-off labor but only works when existing layers meet code limits.

Deck condition → Rotted or damaged decking requires replacement before new membrane installation. Steel deck rust repair adds time and material costs.

Complexity → Roof penetrations (HVAC units, vents, skylights), parapet walls, and custom flashing details increase labor hours. Poor drainage requiring tapered insulation systems affects total project cost.

On-site inspection provides accurate square footage and identifies all cost factors for your commercial flat roof replacement project. Use the calculator below for preliminary estimates, then schedule an inspection for a detailed proposal.

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Recent Commercial Flat Roof Projects