RD27 Scupper Roof Drain from Marathon Roofing Products Inc delivers engineered solutions for commercial roofs where water must exit quickly and reliably. This system combines sloped deck compatibility with corrosion resistant components designed for demanding environments.
Below is a structured overview highlighting core specifications, performance features, and typical applications of RD27 assemblies in professional roof drainage projects.
| Product Code | Drain Type | Max Flow Rate (GPM) | Compatible Deck Slope |
|---|---|---|---|
| RD27 | Scupper Roof Drain | 120 | 1/4:12 minimum slope |
| RD27-XL | High Capacity Scupper | 180 | 1/8:12 minimum slope |
| RD27-PVC | PVC Body Scupper | 100 | 1/4:12 minimum slope |
| RD27-AL | Aluminum Body Scupper | 130 | 1/8:12 minimum slope |
Design Features And Drainage Performance
The RD27 scupper roof drain integrates a wide inlet throat and streamlined internal flow path to minimize clogging and maximize debris passage. This geometry maintains consistent discharge velocity under ponding conditions common in flat roof assemblies.
Marathon Roofing Products Inc specifies stainless steel fasteners and corrosion inhibited hardware to extend service life across freeze thaw cycles and coastal exposures. Proper hanger spacing and structural attachment details are included in project manuals to support long term performance.
Installation Procedures For Roof Drains
Correct installation of RD27 drains starts with verifying substrate thickness and anchor capacity for the selected configuration. Cutting openings to finished dimensions and sealing per manufacturer membranes ensures leak free connections at the roof surface.
Applying continuous flashing skirts and compression style clamps helps maintain waterproofing integrity while allowing slight thermal movement. Field testing with water verification and inspection intervals scheduled after major storms support ongoing reliability.
Material Options And Compatibility
RD27 product families include polymer body units, aluminum housing versions, and hybrid combinations suited to different membrane and deck types. Selecting the correct housing material reduces galvanic corrosion risk when paired with adjacent metal flashings.
Use guidelines provided by Marathon Roofing Products Inc align scupper sizing with roof geometry, rainfall intensity, and maintenance access constraints. Coordination with structural and mechanical teams early in design avoids later field modifications or performance shortfalls.
Code Compliance And Specification Documentation
Each RD27 scupper roof drain references applicable model building code provisions and industry standards for roof drainage overflow capacities. Designers can access technical data sheets, calculations, and third party testing reports through manufacturer channels.
Documentation packages include dimensional details, flow test summaries, and approved accessory lists. This transparent information simplifies plan review, estimator pricing, and owner expectations for long term maintenance responsibilities.
Key Takeaways For Specifying RD27 Roof Drains
- Confirm minimum deck slope and flow rate requirements using published tables from Marathon Roofing Products Inc
- Select housing materials that match roof membrane compatibility and environmental exposure conditions
- Coordinate installation details with structural and mechanical teams early in project planning
- Implement a periodic inspection and debris removal schedule tailored to local climate and roof usage
- Retain manufacturer documentation, test data, and warranty information for code review and future maintenance
FAQ
Reader questions
How does the RD27 scupper roof drain handle high flow events without overflowing?
The RD27 scupper roof drain is sized to accommodate design rainfall intensities and includes oversized inlet areas to reduce surface ponding. Verified flow capacities in published tables help ensure that extreme events remain within engineered allowances when installed per approved drawings.
Can RD27 scupper roof drain assemblies be used on tapered insulation systems?
Yes, RD27 products accommodate tapered insulation by adjusting hanger locations and flashing depths to maintain the required roof slope. Consult installation guides from Marathon Roofing Products Inc for specific configurations and transition details at insulation perimeters.
What maintenance schedule is recommended for RD27 roof drains in coastal locations?
Routine visual inspections at least twice per year, plus additional checks after severe storms, help keep RD27 drains free of debris and corrosion. Coastal sites may require more frequent cleaning and hardware checks due to salt spray and wind driven moisture accumulation.
Are replacement parts and technical support available for older RD27 installations?
Marathon Roofing Products Inc maintains current component inventories and technical documentation for legacy RD27 systems. Authorized distributors and trained field staff can assist with part identification, retrofit options, and compliance verification for updated project requirements.