Compare Your Commercial Roof Options
Six approaches, one goal: the right next step for your roof. Compare repair, maintenance, restoration, TPO retrofit, Roof Hugger, and replacement — what each does, when it fits, and what the scope must define.
Side-by-Side Comparison
| Option | Purpose | Conditions We Evaluate | Owner Tradeoffs | What Scope Must Define |
|---|---|---|---|---|
| Targeted Repair | Address a defined, localized defect while the rest of the roof remains serviceable. | Isolated seam, penetration, flashing, or patch failure with sound surrounding roof. | Lowest cost and disruption. Does not extend the whole roof's service life. | Specific defect location, repair method, materials, and warranty on the repair work only. |
| Maintenance | Monitor condition and provide agreed care to keep a serviceable roof performing. | Roof is still performing but needs inspections, minor repairs, and drainage review. | Low ongoing cost. Does not restore aging or failing sections — it manages them. | Inspection frequency, included preventive work, separately quoted repairs, documentation. |
| Qualified Restoration / Coating | Retain a qualifying roof using preparation, repairs, and an approved coating system. | Roof is structurally stable, substrate is suitable, moisture is acceptable, drainage can be addressed. | Less disruption than tear-off. Not every roof qualifies — coating does not fix wet insulation or failing attachment. | Preparation, repairs, reinforcement, coating system, manufacturer requirements, warranty terms. |
| TPO Retrofit Over Metal | Install a new TPO membrane over a qualifying existing metal roof with flute-fill insulation. | Existing structure, attachment, moisture, drainage, wind, code, and manufacturer criteria reviewed. | Adds insulation and a new membrane. Project-designed assembly — one building's specs are not universal. | Flute-fill, insulation/cover board, fastening pattern, membrane, wind review, code compliance. |
| Roof Hugger / Metal-Over-Metal | Structural subframing that supports a new metal roof over a qualifying existing metal roof. | Existing structure and geometry evaluated; purlin connections and loads reviewed. | New metal roof with potential standing-seam upgrade. Distinct from coating and membrane retrofit — not universal no-tear-off. | Subframing design, purlin connections, new panels, insulation options, transitions. |
| Replacement | Full tear-off and new roof system when the existing roof is beyond restoration or repair. | Widespread saturation, structural concerns, severe membrane failure, or unsuitable retained materials. | Highest cost and disruption. Sometimes the only responsible option — but not the first assumption. | Tear-off, disposal, structural review, insulation, drainage, new system, accessories, interior protection. |
Targeted Repair
Address a defined, localized defect while the rest of the roof remains serviceable.
Isolated seam, penetration, flashing, or patch failure with sound surrounding roof.
Lowest cost and disruption. Does not extend the whole roof's service life.
Specific defect location, repair method, materials, and warranty on the repair work only.
Maintenance
Monitor condition and provide agreed care to keep a serviceable roof performing.
Roof is still performing but needs inspections, minor repairs, and drainage review.
Low ongoing cost. Does not restore aging or failing sections — it manages them.
Inspection frequency, included preventive work, separately quoted repairs, documentation.
Qualified Restoration / Coating
Retain a qualifying roof using preparation, repairs, and an approved coating system.
Roof is structurally stable, substrate is suitable, moisture is acceptable, drainage can be addressed.
Less disruption than tear-off. Not every roof qualifies — coating does not fix wet insulation or failing attachment.
Preparation, repairs, reinforcement, coating system, manufacturer requirements, warranty terms.
TPO Retrofit Over Metal
Install a new TPO membrane over a qualifying existing metal roof with flute-fill insulation.
Existing structure, attachment, moisture, drainage, wind, code, and manufacturer criteria reviewed.
Adds insulation and a new membrane. Project-designed assembly — one building's specs are not universal.
Flute-fill, insulation/cover board, fastening pattern, membrane, wind review, code compliance.
Roof Hugger / Metal-Over-Metal
Structural subframing that supports a new metal roof over a qualifying existing metal roof.
Existing structure and geometry evaluated; purlin connections and loads reviewed.
New metal roof with potential standing-seam upgrade. Distinct from coating and membrane retrofit — not universal no-tear-off.
Subframing design, purlin connections, new panels, insulation options, transitions.
Replacement
Full tear-off and new roof system when the existing roof is beyond restoration or repair.
Widespread saturation, structural concerns, severe membrane failure, or unsuitable retained materials.
Highest cost and disruption. Sometimes the only responsible option — but not the first assumption.
Tear-off, disposal, structural review, insulation, drainage, new system, accessories, interior protection.
How Each Option Works
Targeted Repair
A targeted repair addresses a defined localized defect — a failed seam, a cracked pipe boot, a flashing detail — while the rest of the roof remains serviceable. It is the lowest-cost, lowest-disruption option when the issue is isolated. It does not extend the whole roof's service life, and it does not address conditions elsewhere on the roof. One section can be repaired while another is restored or monitored.
Maintenance
Maintenance monitors condition and provides agreed care — inspections, drainage review, minor repairs, and documentation — to keep a serviceable roof performing. It does not restore aging or failing sections; it manages them. Our Essential Roof Watch, Professional Maintenance Program, and Portfolio / Facility Roof Program offer different inspection frequencies and documentation levels. A roof can be maintained while an owner plans future restoration or replacement.
Qualified Restoration / Coating
Restoration retains a qualifying roof using cleaning and preparation, necessary repairs, corrosion treatment and primer where specified, seam and detail reinforcement, penetration work, and a specified protective coating system. It is more than applying a finish coat. Coatings do not restore lost structural capacity or automatically fix rust-through, wet insulation, failing attachments, or defective drainage. Qualification depends on roof condition, moisture, substrate, drainage, adhesion, and manufacturer requirements.
TPO Retrofit Over Metal
For qualifying metal roofs, a TPO retrofit installs fitted flute-fill insulation between the metal ribs, a specified insulation or cover-board assembly, and a new TPO membrane with heat-welded seams. This is a mechanically attached, project-designed assembly — existing structure, attachment, moisture, drainage, wind requirements, applicable code, and manufacturer criteria must be reviewed. One project's board thickness, insulation value, fastening pattern, or price is not the standard for all buildings. Existing silicone does not by itself establish eligibility or ineligibility.
Roof Hugger / Metal-Over-Metal
Roof Hugger is designed structural subframing that supports a new metal roof over a qualifying existing metal roof. It is distinct from coating and membrane retrofit. The existing structure, purlin connections, geometry, loads, and insulation opportunities are evaluated. New panels — potentially a standing-seam upgrade — and transitions are part of the system design. We do not promise universal no-tear-off, zero disruption, or automatic code compliance.
Replacement
Replacement is necessary when the roof is beyond restoration — widespread saturation, structural concerns, severe membrane failure, or unsuitable retained materials. It should not be the first assumption, but it is sometimes the only responsible option. A full replacement proposal must still identify included structural, insulation, drainage, accessory, and interior work. Partial replacement or different systems on separate roof sections may also be the responsible solution.
Mixed solutions are common. One roof section may be repaired, another restored, and another retrofitted or replaced. An initial evaluation does not predetermine the answer — it documents the condition so you can choose the right path for each section.
No universal promises. We do not promise universal no-tear-off, zero disruption, guaranteed energy savings, or a tool that automatically diagnoses which roof to buy. Each option's suitability depends on an onsite evaluation of your specific roof.
Comparing Roof Options — FAQ
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A documented evaluation maps your roof by section and identifies which options are realistic for each area.
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