Services
Commercial roofing, done properly.
Replacement, restoration, repair, new construction, and storm response for pharma, biotech, industrial, warehouse, and public facilities in Puerto Rico.
Roof replacement
When a roof has reached the end of its service life, we specify a replacement that fits the building, the budget, and the warranty requirements.
- Tear-off and recover options
- Insulation and assembly upgrades where the specification calls for them
- Phased work around operating areas
Restoration and coatings
A sound roof can often be restored instead of replaced. We evaluate conditions first and recommend restoration only where it makes sense.
- Condition evaluation before any recommendation
- Fluid-applied coating systems
- Targeted repairs before restoration
Repair and leak response
Leaks put people, equipment, and inventory at risk. We find the source, make a proper repair, and document what we found.
- Leak investigation and source repair
- Flashing, seam, and penetration repairs
- Written findings to support your planning
New construction
Roof systems installed to project specifications, coordinated with your general contractor, design team, and schedule.
- Specification review
- Coordination with other trades
- Manufacturer closeout and warranty documentation
Storm and hurricane response
Hurricane season does not wait. We help you assess the damage, secure the roof, and plan the permanent repair.
- Post-storm roof assessment
- Temporary protection to limit further damage
- Documented scope for permanent repair
Roof systems
Systems we install and service.
The right system depends on the building, its use, and the specification. We will walk you through the options.
TPO
Heat-welded single-ply membrane with a bright white surface that reflects much of the sun. A common choice for warehouses, distribution, and large low-slope roofs.
PVC
Heat-welded single-ply membrane with strong resistance to chemicals, oils, and grease for demanding plants and environments.
Modified bitumen
Multi-ply asphalt membrane valued for its toughness and layered redundancy.
Built-up
Traditional multi-ply built-up roofing for owners and specifications that call for it.
Metal
New installation, repair, and upkeep of metal roofs, with attention to the corrosion salt air causes near the coast.
Coatings
Fluid-applied restoration systems for sound roofs, applied to manufacturer requirements.
GAF warranties
Manufacturer warranties, backed by certification.
As a 2026 GAF GoldElite Commercial Contractor, Mammoth can offer these GAF warranties on qualified projects.
GAF manufacturer warranties
Available on qualified projects. Eligibility and terms are set by GAF.
Diamond Pledge NDL
GAF’s no dollar limit guarantee, available on qualified projects.
System Pledge
A GAF guarantee for qualified GAF commercial roof systems.
Integrated System Limited Warranty
A GAF limited warranty for qualified integrated roof systems.
Eligibility, terms, and coverage are set by GAF and depend on the roof system and project.
Public sector purchasing
TIPS awarded vendor
Mammoth Services, LLC is an awarded vendor through TIPS, The Interlocal Purchasing System, for roofing. Contract 24060401. Municipalities, agencies, and other public entities in Puerto Rico that are TIPS members can consider this contract as a cooperative purchasing option. Each entity should confirm with its purchasing office or legal advisor that the purchase fits its own rules.
Next step
Have a roof that needs attention?
Book a roof assessment. We start with your building, your schedule, and what your operation needs.