The work to specify a retractable roof system can be much more complicated than specifying a door or a window. It sits at the intersection of structure, mechanical engineering, weatherproofing, and daylighting — and it carries weight, literally and figuratively, on the project’s success. Done right, it transforms the space your client has been imagining. Done wrong, it creates coordination headaches that follow the project through permit review, installation, and long after final inspection.
Rollamatic Roofs, Inc. has collaborated with architects seeking to specify a retractable roof for their custom residential and commercial projects since 1958. Serving architects and project construction teams worldwide from conceptual design through installation is the core of how Rollamatic Roofs operates. This post is written for the design professional navigating a specification for the first time, or refining a process that’s worked but could be tighter.
Understanding the Five Basic Retractable Roof Configurations
Before a single line goes on the spec sheet, the movement configuration has to match the project’s geometry. Rollamatic Roofs builds five distinct base configurations, and the appropriate choice depends on available adjacent roof space, structural constraints, and the visual intent of the design.
Single-Section Retracting
The entire rooftop unit moves as one piece onto adjacent roof space to net a full opening. This is the most straightforward and typically the most cost-effective configuration when the site has adequate space to receive the unit panel. For a residential atrium with a clear adjacent roof run, this is often the starting point.
Bi-Parting
The rooftop system splits so each half travels in opposite directions, meeting in the center of the rooftop opening when closed and parting symmetrically when open to net a full opening. Architects often choose this configuration for visual balance — the symmetry reads well on plan and in elevation — or when adjacent roof space is constrained on one side.
Retracting-Over-Stationary
Slides a moving section over a fixed glazed section. The result is a partially open system that maintains weather protection on the stationary portion while allowing the operable section to retract. This configuration works well when structural or aesthetic conditions limit how much of the opening can be cleared.
Telescoping
Stacks multiple sections over one another, compressing the retracted footprint significantly. It offers a modern aesthetic and is the right call when adjacent roof space is genuinely limited. This configuration works well when the opening is constrained on its sides and greater than half the opening is desired. Telescoping can also be configured as a bi-parting variant for even greater flexibility.
Rotating Dome
Rotates half of the dome over the fixed half, providing a half-open dome. Additionally, the entire dome can rotate to position the opening as desired, opening the full aperture to the sky. The configuration is purpose-built for solar observatories — including institutional, school, and research facilities — and works equally well over curved stairways and specialty architectural forms where a standard retracting geometry won’t resolve. Rollamatic Roof’s Clark Observatory installation is the reference project for this type.
What Goes Into the Structural Retractable Roof Documentation
Pre-permit and/or pre-bid structural coordination will avoid construction delays and change orders. Structural coordination is where many projects that specify a retractable roof either save time or lose it. The key is establishing a clear exchange between the design team and the manufacturer early in the process.
Rollamatic Roofs provides comprehensive Design/Build services, including fully engineered and detailed shop drawings to support the structural engineer of record, whether that’s the client’s preferred firm or a firm Rollamatic coordinates with on the project team’s behalf. Shop drawings include framing details, connection points, load transfer paths, and geometry sufficient for structural analysis. This is not a product cut sheet. It’s documentation designed to make the engineer’s job faster.
All Rollamatic Roofs are custom engineered to meet current code for their configuration and location by Rollamatic Roofs’ engineering team. On structural loads: glazed roof systems introduce dead and live loads from the frame and glazing, plus dynamic loads from the mechanical system in operation. The exact load values for any Rollamatic system depend on the specific configuration, span, glazing specification, and site conditions, which is why Rollamatic treats every system as a custom engineering exercise rather than a catalog selection. What architects should plan for in early-stage coordination is providing the governing code edition, applicable local amendments, and any seismic or wind exposure category information. Rollamatic’s engineering team can then engage the structural conversation with the project-specific data the system will actually generate.
The goal is a structurally integrated, permit-ready drawing package. That’s what Rollamatic produces — shop drawings that expedite permitting rather than creating additional questions.
This coordination happens across every jurisdiction where Rollamatic Roofs works — which includes projects throughout the United States and internationally. The engineering process does not change based on project location. What changes is the governing code edition and local AHJ requirements, which Rollamatic incorporates from the start.
LEED, Passive House, and Green Building Compatibility
Operable glazed roof systems can contribute meaningfully to green building certifications, and architects increasingly ask about this early in design. The relevant pathways vary by certification framework, but the general mechanisms are consistent.
Daylighting credits benefit from a glazed roof that can be opened or closed to modulate natural light, ventilation, and heat gain within a building’s interior space. Passive ventilation strategies, particularly stack effect ventilation, become more effective when the operable retractable roof can be tuned to the thermal conditions. And HVAC load reduction is a direct consequence of a system that allows occupants to condition the space with natural airflow during appropriate seasons. One Rollamatic Roofs homeowner reported turning off the heater from April through October.
Rollamatic Roof’s control systems are compatible with building management system (BMS) integration, which supports LEED, WELL, and Passive House documentation requirements for automated and occupant-controlled environmental systems. Rain and wind sensors are available, and the system can be configured to respond automatically to environmental conditions — relevant for projects where automation is part of the sustainability strategy.
If your retractable roof project includes a green building consultant, Rollamatic Roofs can provide the technical documentation needed to support credit submissions. This is a coordination step, not a barrier.
Retractable Roof Permitting Support and CSLB Licensing
Retractable roof systems require building permits in virtually every California jurisdiction. The permit package typically includes shop drawings, structural calculations, energy compliance documentation (Title 24 for California projects), and the mechanical operational system specification.
Rollamatic Roofs holds California Contractors State License Board license #840500. For California projects, this is the baseline credential architects should confirm with any operable roof manufacturer before specification. It establishes that the installer is licensed to perform structural work in the state.
For jurisdictions outside California, Rollamatic Roofs provides structural engineering for the retractable roof and coordinates with the local authority having jurisdiction (AHJ) to ensure the permit package meets local requirements. The shop drawing package is produced to support permit submission, and Rollamatic Roofs’ project team is available to respond to plan check comments directly.
Architects who have worked through retractable roof permits before know that the plan check process goes faster when the manufacturer is a responsive partner in that process, not a passive supplier waiting for the permit to close.
Retractable Roof Installation Coordination: What the Architect Should Expect
Retractable roof installation is a trades coordination exercise. The coordination starts with a clearly detailed set of shop drawings tailored to the specific conditions of the roof and construction documents. The Rollamatic Roofs retracting roof system is shop fabricated, pre-assembled, tested, disassembled, transported, and finally reassembled on site for installation. The installation completion depends upon the roofing contractor and the electrical contractor (a dedicated circuit is required, typically 20-amp/120v for residential systems) completing their work, to specification, in advance.
Rollamatic Roofs’ team either self-performs installation or supervises contractor installation depending on project location and scope. Either way, the architect and GC are provided a clear scope hand-off, a defined installation sequence, and a point of contact through final inspection and owner training.
“A Rollamatic operable skylight bathed my house in natural sunlight, added exceptional air quality, and definitely wowed my guests. Since then, I have installed 10 for clients and have five pending projects.”
— John Andrews, Architect and General Contractor, Andrews Group Architects
Frequently Asked Questions
Do I need to provide structural load specs to start a Rollamatic specification?
No. Rollamatic provides the load data to your structural engineer, not the other way around. When you engage early, Rollamatic’s team produces shop drawings that include framing details, connection points, and load transfer paths. What you bring to the initial conversation is the governing code edition, applicable local amendments, and any seismic or wind exposure category for the site. Rollamatic Roofs provides complete engineering, calculations, and detailing for its system, enabling the building engineering teams to design the building support structure efficiently.
Can a Rollamatic Roofs retractable roof system contribute to LEED or Passive House certification?
Yes. Rollamatic Roofs systems are compatible with building management systems (BMS) integration and support daylighting, passive ventilation, and HVAC load reduction strategies relevant to LEED, WELL, and Passive House documentation. If your project has a green building consultant, Rollamatic Roofs can provide the technical documentation needed to support credit submissions.
Does Rollamatic Roofs work with projects outside California?
Rollamatic works with architects and project teams across the United States and internationally with projects that specify a retractable roof. It always has. More than 2,400 systems have been installed worldwide since 1958. The specification and engineering process is the same regardless of location; what adjusts is the governing code edition, measurement system (Imperial or metric), and local AHJ requirements, which Rollamatic incorporates from the start of each project.
What is an operable retractable roof skylight specification, and how is it different from specifying a standard skylight?
A standard skylight specification incorporates a fixed, sealed glazing unit — a product selection, essentially. An operable skylight or retractable roof skylight specification incorporates a custom-engineered system with a drive mechanism, structural load documentation, electrical requirements, integrated shop drawings, and a coordinated installation sequence. It’s a comprehensive design-build engagement, not a product order. Rollamatic Roofs provides shop drawings, engineering support, and installation coordination as part of the specification process.
Is Rollamatic Roofs a licensed contractor?
Yes. Rollamatic holds California Contractors State License Board license #840500, which authorizes structural work in California. For retractable roof projects in other jurisdictions, Rollamatic Roofs provides structural engineering for the retractable roof and thorough documentation to support requirements dictated by the local authority having jurisdiction (AHJ) to ensure the permit package meets local regulations.
Initiating a Retractable Roof “Specification Package”
The most efficient way to begin a Rollamatic specification is to request a Design Coordination Review or “Specification Package” early in the Design stage, before structural engineering is locked and before the retractable roof configuration is finalized. Early engagement assures the shop drawings and engineering documentation arrive in time to inform the structural design, not catch up to it. Rollamatic Roof’s “Specification Package” is a complimentary design review covering configuration, structural, mechanical, and energy considerations.
Rollamatic Roofs’ team works directly with architects throughout the process: configuration selection, structural coordination, permitting support, and installation. That process is consistent whether the project is in California, across the U.S., or overseas. Rollamatic Roofs has delivered its retractable roof systems throughout the United States and internationally for more than six decades, and the “Specification Package” is built to support project teams wherever they’re working. Rollamatic Roofs’ direct toll-free phone number is 800-345-7392. The “Specification Package” request starts the conversation.
More on Rollamatic Roofs’ work with contractors and architects: rollamatic.com/contractors-and-architects/