Specifications

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Codes & Compliances


LTTR Calculator

Fastening Patterns


Installation

Certified Drainage Program (CDP) & Field Services

Case Studies

 




PRE-MANUFACTURED ONE-PIECE GEMINI DRAIN SETS ARE AN ESSENTIAL FEATURE OF A WELL-DESIGNED ROOF SYSTEM

Even with the use of tapered insulation and the use of crickets, many roof designs still don’t eliminate ponding around the drain area. Hand cut drain sumps are even worse because contractors often cut off facers, resulting in membrane adhesion problems, or uneven slopes to the drain which could cause ponding.

Atlas has developed the perfect solution with this one-piece 4’ x 4’ sloped polyiso drain set. Available with either a 1.5" or 3.0" maximum thickness. Gemini Drain Sets install quickly, save labor costs and eliminate rooftop waste. And Atlas Gemini Drain Sets are designed to mate perfectly with Atlas tapered insulation panels and Gemini Crickets.

 Long Term Thermal Resistance (LTTR) & Thicknesses

 ACFoam Typical Physical Properties

 CODES & COMPLIANCES

  • Federal Specification HH-I-1972/GEN and HH-I-1972/2 has been cancelled.*
  • Federal Specification HH-I-1972/GEN and HH-I-1972/3, Class 1 has been cancelled.**
  • ASTM C 1289, Type II*
  • ASTM C 1289, Type III**
  • ASTM C 1289-95, Type II***
  • Miami-Dade County, Florida Product Control No. 00-0208.04* **
  • California State Insulation Quality Standards and Title 25 Foam Flammability Criteria (License #TC 1231)
  • IBC, NBC, UBC and SBC Sections on Foam Insulation (Chapter 26).
  • CCMC No. 12464-L*
  • CCMC No. 12423-L***
  • CAN/CGSB Standards* ***

FM Standard 4450/4470 Approval
Tapered ACFoam is approved for Class 1 insulated steel, wood, concrete and gypsum roof deck construction for I-60 and I-90 Windstorm Classifications (may be mopped or mechanically fastened to concrete roof decks). Refer to FM Approval Guide for details on specific systems.

UL Standard 1256 Classification* **
Insulated metal deck construction assemblies - Construction #120 and #123

UL Standard 790 (ASTM E 108) Classification
Class A with most roof membrane systems. See UL Roofing Materials & Systems Directory.

UL Standard 263 Fire Resistance Classification (ASTM E 119)
Some classifications for fire resistance for Tapered ACFoam are P225, P230, P259, P508, P510, P514, P701, P710, P713,P717, P718, P719, P720, P722, P723, P724, P725, P727, P728, P729, P730, P732, P801, P814, P815, P818, P819, and P828.

Some classifications for fire resistance for Tapered ACFoam Composite & Tapered ACFoam Composite/GB are P230, P259, P508, P510, P514, P710, P711, P715, P717, P718, P814, P815, P818, and P828.

Some classifications for fire resistance for Tapered ACFoam III are P225, P230, P259, P508, P510, P514, P701, P710, P713,P717, P718, P719, P720, P722, P723, P724, P725, P727, P728, P729, P730, P732, P801, P814, P815, P818, P819, and P828. See UL Fire Resistance Directory for updated listings.

UL of Canada*
Insulated Roof Deck Assemblies - Construction #C34*
CAN/ULC-S126-M86*

Tapered ACFoam III is covered by one or more claims of Patent #5,001,005***

* Tapered ACFoam
** Tapered ACFoam Composite & Tapered ACFoam Composite/GB
*** Tapered ACFoam III


Spec this Product
 

 RECOMMENDED USES

The number one problem on low slope roof systems is ponding water. That’s because it’s the primary cause of premature roof failures. Gemini Drain Sets help prevent structural collapse, ice build-up, moisture invasion and all the other problems caused by standing water on roofs.
 

 WARRANTY

In response to valid concerns of building designers regarding thermal efficiency of roof assemblies and the long-term insulating value of roof insulation, Atlas offers a 20-year, limited thermal warranty. The "ACFoam" Limited Warranty places Atlas ACFoam products above all others and supports the building owner, designer and contractor by backing up thermal performance. This warranty is available to the building owner at the time the building is completed and is transferable to any subsequent owner for the duration of the 20-year period.

Limitation of Liability
Other than the aforementioned representations and descriptions, Atlas Roofing Corporation (hereafter, “Seller”) makes no other representations or warranties as to the insulation sold herein. The Seller disclaims all other warranties, express or implied, including the warranty of merchantability and the warranty of fitness for a particular purpose. Seller does, however, have a limited warranty as to the R-Value of the insulation, the terms of which are available upon request from the Seller.

The Seller shall not be liable for any incidental or consequential damages including the cost of installation, removal, repair or replacement of this product. The Buyer’s remedies shall be limited exclusively to, at Seller’s option, the repayment of the purchase price or resupply of product manufactured by Atlas in a quantity equal to that of the nonconforming product. Atlas distributors, agents, salespersons or other independent representatives have no authority to waive or alter the above limitation of liability and remedies.

20 Year Limited Warranty
 

 INSTALLATION

Installation instructions for this product are not currently available.
 
Complete Instructions
 

 STORAGE

Storage/Precautions: Factory-applied packaging is intended only for protection during transit. When stored outdoors or on the job site, packages should be stacked on pallets at least four inches above ground level and completely covered with a weatherproof covering such as a tarpaulin. The temporary factory-applied packaging should be slit or removed to prevent accumulation of condensation. Roof insulation which has become wet or damaged should be removed and replaced with solid, dry insulation.

Warning! Do Not Leave Exposed: This product is a polyiso organic plastic foam and will burn if exposed to an ignition source of sufficient heat and intensity, or open flame, such as a welder´s torch. Like other organic materials, this product will release smoke if ignited. Do not apply flame directly to ACFoam roof insulations. This product should be used only in strict accordance with Atlas recommended uses and application instructions.


 
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Features & Benefits

ACUltra Technology means ZERO HCFC´s

Construction variances from building drawings are easily accommodated on site

Gemini Drain Sets install quickly, save labor costs and eliminate rooftop waste

Gemini Drain Sets are designed to mate perfectly with Atlas tapered insulation panels and Gemini Crickets

Cost-effective, environmentally friendly solution for any roof