What are these on this roof

Are these fasteners? There is a large antenna next to the building and am also curious if these have anything to do with frequency (shielding, etc…) Thanks in advance, Cliff

Old EPDM Mars system. Button down membrane

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Thanks! I’ve never seen this system before…

Firestone GeoGard if im not mistaken.

i could be wrong though have not seen them in a long time


Broken Arrow roofing

It is an EPDM System
STRENGTH
EPDM is a high tensile strength, single-ply membrane ideal for long-term watertight
integrity. EPDM is lightweight, ideal for new construction and retrofit systems
without adding excessive weight to the roof deck.

FLEXIBILITY
The membrane remains flexible in hot and cold temperatures so it will not
split or crack.

LONG LIFECYCLE
It provides excellent resistance to ozone and UV and can handle the coldest
winters or the desert heat.