Commercial & Government Roofing

Comprehensive
Roofing Systems

Doliveira Systems LLC is a general contractor certified in every major roofing system used in the Mid-Atlantic region, from single-ply membranes to steep slope and metal. Our crews bring more than 50 years of combined field experience to each project, and UL and FM approved assemblies are available across our systems.

Certifications & Set-Asides
  • SBA 8(a)Business Development Program participant
  • WOSB / EDWOSBWoman-Owned & Economically Disadvantaged Woman-Owned Small Business
  • HUBZoneHistorically Underutilized Business Zone certified
  • PA UCPPennsylvania Unified Certification Program (DBE)

Single-Ply Membrane Systems

Roofer installing black single-ply membrane on a flat roof
Single-Ply

EPDM (Rubber)

The Workhorse of Single-Ply Roofs

Lightweight, synthetic elastomer used since the early 1970s. EPDM's resilience, tensile strength, and resistance to ozone, UV light, and ponding water make it an outstanding roofing material.

  • Installation: Fully Adhered, Ballasted, or Mechanically Attached
  • Superior Elongation: Adapts to temperature extremes
  • Fleece Back: Hot asphalt or low-rise adhesive compatible
  • Economical: Minimum maintenance and repair costs
  • UL and FM approved systems available
  • Strong Single Source warranty
Roofer heat-welding a thermoplastic membrane seam on a flat roof
Single-Ply

Thermoplastics (PVC & TPO)

Heat-Welded Excellence Since 1970s

Lightweight, reinforced, light-colored membrane used since the early 1970s. Highly resistant to chemical atmospheres, ozone, UV light, tears, and extreme weather conditions.

  • Reinforced Membrane: Excellent tear resistance
  • Chemical Resistance: Oils, most chemicals and pollutants
  • Fire Resistance: Excellent fire resistance properties
  • Heat Welding: Superior seam strength
  • Weather Resistance: Highly resistant to ozone and UV
  • UL and FM approved systems available
Existing corrugated metal roof on an industrial building
Retrofit

Retrofit Over Metal

Innovative Metal Roof Solutions

With a variety of attachment methods, our Metal Retrofit System can be configured to most metal roof designs and meets national, state, and local building codes.

  • No Panel Replacement: Eliminates panel replacement cost
  • FM Ratings: Meets FM I-60 and I-90 ratings
  • Energy Savings: Additional R-value reduces energy costs
  • System Variety: Various single-ply roof systems available
  • Minimal Weight: Minimal addition to existing roof load
  • Meets all national, state & local codes

Coating & Surface Systems

Worker rolling a waterproof coating onto a flat roof
Coating

Acrylic Roof System

Non-Toxic Water-Based Solution

A special formulation of non-toxic, water-based acrylics that cures into a continuous elastomeric membrane. Provides an excellent restoration solution for metal roofs.

  • Properties: Excellent adhesive and elongation characteristics
  • Durability: Withstands UV, temperature extremes & mildew
  • Compatibility: Adheres to most building substrates
  • Colors: White and beige; special colors on request
  • Application: Brush, sprayer or roller
  • UL and FM approved; VOC compliant
Aerial view of a large commercial low-slope rooftop
Coating

Coating Systems

Enhanced Protection & Performance

Materials for roof surfacing, maintenance or repair to enhance weatherability, reflectivity, UV protection, or aesthetics of the installed roof system.

  • EPDM Specialty: Special formulation for EPDM roofs (white/aluminum)
  • Aluminum Coatings: Highly sun-reflective finish for multiple roof types
  • Wet Surface: Available for damp or dry roof surfaces
  • ASTM Compliance: Meets or exceeds ASTM standard specifications
  • Material and labor warranties available

Built-Up & Advanced Systems

Roofers applying hot bitumen to a flat roof
Built-Up

Built-Up Roofing (BUR)

Time-Tested Multi-Layer Durability

Multiple layers of felts, fabrics or mats saturated with bitumen, installed in alternating solid mopping of hot bitumen or cold adhesives.

  • Multi-Layer: Ideal for resisting mechanical damage
  • Installation: Hot bitumen (asphalt or coal tar) or cold adhesives
  • Surface Options: Gravel, mineral cap sheets or smooth coatings
  • Materials: Felts, fabrics or mats saturated with bitumen
Roofers torch-applying modified bitumen membrane
Bitumen

Modified Bitumen

Polymer-Enhanced Performance Since 1975

Polymer modified bitumen sheet membranes (SBS and APP) have been used since 1975, composed of asphalt reinforced with polyester or fiberglass.

  • Polymer Types: SBS (styrene-butadiene) and APP
  • Reinforcement: Polyester or fiberglass reinforced
  • Installation: Hot bitumen, torch applied or cold adhesive
  • Multiple Layers: Typically multi-ply; factory surfacing available
  • Traffic Resistance: Heavy traffic, puncture and tear resistant
Roofers installing insulation boards on a flat roof
Spray Foam

Spray Polyurethane Foam (SPF)

35+ Years of Seamless Innovation

SPF roofing has been used for over 35 years. No matter the physical shape of the roof, this seamless system can be effectively applied.

  • Seamless: Waterproof regardless of roof shape
  • Energy Savings: Energy Star certified reflective coating
  • Stable: Odorless, mildew and fungi resistant
  • High R-Value: Reduces thermal shock from temperature changes
  • Lightweight: Won't sag; flexible under building expansion
  • Self-Flashing: UL tested and approved; fast application

Steep Slope & Metal Systems

Slate shingle roof on a pitched building
Steep Slope

Steep Slope Systems

Complete Architectural Solutions

Comprehensive range of steep slope solutions for diverse aesthetic and functional requirements across commercial applications.

  • Shingles: Standard or dimensional asphalt, metal or synthetic
  • Slate: Multi-colored custom-cut stone for historic or rustic look
  • Tile: Multi-shaped, custom-sized natural materials
  • Metal: Architectural and structural panel roof systems
  • Wood Shakes: Cedar split shakes for aesthetic appeal
  • Custom Options: Custom colors and finish coatings available
  • Long-term weatherability and low maintenance
Industrial building clad in concealed-fastener metal wall panels
Metal

Metal Roof, Siding & Mansard Systems

Concealed Panel Versatility & Durability

Concealed panel system provides versatility, durability, and aesthetic appeal for both industrial and architectural applications.

  • Concealed Fasteners: Limited penetration, no fastener corrosion
  • Applications: Industrial and Architectural
  • Design Variety: Wide range of designs and colors
  • Retrofit Systems: Suited to most structural designs
  • Complete Systems: Matching siding and mansard systems
  • Manufacturer's and single source warranties available
Ready to Get Started?

Let's Build Your Roofing Solution

Doliveira Systems delivers every project with quality, safety, and integrity. Contact our team for a consultation.