Posted by on January 5, 2017

EPDM Roofing Systems may be selected for many commercial and industrial roofing applications. The choice of system is left up to the specifier, however, there are certain guidelines that should be followed in order to assure that the system chosen is appropriate. The following list of systems and their applicability is meant to be a guide in the proper system selection. Download Mule-Hide’s EPDM Guide
Ballasted Systems are meant to be used where the slope of the deck will not exceed a 2:12 pitch. They may be installed up to a height of 60 ft. in FM Zones 1 or 2. See FM Loss Prevention Data Sheet 1-28. CAUTION! The specifier, designer and/or architect must ensure that the deck is capable of withstanding the weight of this system.

Fully Adhered Systems are not limited by slope. They may be installed up to a height of 100 ft. in FM Zones 1 or 2. See FM Loss Prevention Data Sheet 1-28. A minimum fastener pullout of 360 lbs. is required.

Mechanically Attached Systems are limited to decks where the slope will not exceed 18:12 pitch. They may be installed up to a height of 60 ft. in FM Zones 1 or 2. See FM Loss Prevention Data Sheet 1-28.

EPDM Rubber Roof System Limitations
Should any of the following conditions exist, EPDM Systems are not recommended and should not be used. The systems are not warrantable under the following conditions.
The structure is unable to support the completed roofing system and other anticipated loads identified by the owner’s engineer or architect.
The roofing surface will be used for something other than normal commercial roofing conditions, such as plaza decks, waterproofing, or other non-roofing uses or activities.
To ensure that the minimum requirements are met for the Manufacturer’s Warranty, EPDM Roofing Systems should not be installed without first consulting the Manufacturer’s Technical Department for special consideration if any of the following conditions exist:

1. For Mechanically Attached and Ballasted Systems, the building height exceeds 60 ft.
2. For an Adhered System, the building height exceeds 100 ft.
3. Building is located within 1500 ft. of a coastline or large body of water.
4. Roof is within an area classified as Zone 3 by FM Loss Prevention Sheet 1-28.
5. Roof will be subject to discharge of chemicals or industrial contaminants.
6. Roof will be subject to positive pressure from air infiltration of the deck from canopies, overhangs, or positive interior pressure from air handlers.
7. Buildings have large openings (in excess of 10% of wall area of any side) in the wall, which could cause positive pressure to occur if they were left open to strong wind, such as aircraft hangers warehouses, loading terminals and large maintenance facilities.

Posted in: Flat Roof Systems

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