Siplast Commercial Roofing Systems

Siplast, Inc., part of Standard Industries, manufactures commercial roofing, waterproofing, and building-envelope systems. Its current national sales office is in Dallas, Texas. Siplast systems are project-specific and are commonly specified through combinations of membranes, liquid-applied products, insulation, accessories, and approved installation details.

Corporate History

Siplast traces its roofing innovations to 1958 and its SBS membrane work to 1965. The company introduced its Teranap SBS geomembrane in 1972, incorporated in the United States in 1979, and opened its Arkadelphia, Arkansas, plant in 1981. In 2016, Siplast joined Standard Industries.

Product Portfolio

Siplast’s current portfolio spans SBS-modified bitumen, PMMA and STP liquid-applied systems, single-ply membranes, vegetated roofs and amenity decks, traffic surfacing, wall systems, insulation, and below-grade waterproofing. System design and component compatibility depend on substrate, slope, drainage, exposure, occupancy, code, detailing, and project requirements.

• SBS-modified bitumen: Multi-ply commercial roof systems with product-specific base, cap, attachment, flashing, and surfacing requirements.
• Parapro: A reinforced PMMA liquid-applied roof and waterproofing system. Its resin is used with specified reinforcement, substrate preparation, primers, and compatible base or transition materials according to the approved assembly.
• Single-ply and liquid-applied systems: Membrane type, thickness, reinforcement, attachment, seam treatment, and transition details must match the selected specification.
• Vegetated and amenity assemblies: Waterproofing, root protection, drainage, overburden, structural load, access, and maintenance require coordinated design.

Contractors and Project Review

Siplast selects and trains independent contractors for roofing, waterproofing, and building-envelope specialties. Current criteria include demonstrated performance, required training, quality standards, and ongoing practice. Verify the contractor’s current status with Siplast for the proposed system, along with licensing where required, insurance, references, safety record, and written scope.

Environmental and Rating Claims

The U.S. Environmental Protection Agency ended ENERGY STAR certification for roof products in 2022. For current projects, use the exact product’s Cool Roof Rating Council ratings, environmental product declarations, code listings, and documentation relevant to the current LEED or local program. A product does not itself “earn LEED”; project teams document how materials and assemblies contribute to applicable credits and prerequisites.

Guarantees

Guarantee eligibility, submittals, inspections, and coverage depend on the specified Siplast assembly and project. A registered Select Contractor can submit and track applications through Siplast’s current portal. Obtain the sample guarantee before award and the final issued terms after completion. Confirm covered components, term, exclusions, maintenance, inspection requirements, leak-response process, transfer, and remedies.

Contacting Siplast