Rooftop vent for reducing pressure under a membrane roof

A membrane roof, comprising:

• a) a roof membrane with a hole;
• a) a lower dome with a port in a top surface;
• b) an upper dome supported above the lower dome, wherein the upper dome has a bottom surface;
• wherein the top surface and bottom surface face each other and are spaced apart;
• wherein a distance between the top and bottom surfaces decreases smoothly from a periphery to a center of the vent;
• and
• c) a horizontal flange circumscribing a bottom of the lower dome, wherein the flange is secured to the roof membrane in an area circumscribing the hole.

A roof vent for use with membrane roofs, comprising:

• a) a lower dome with a convex surface and a port in the convex surface;
• b) an upper dome supported above the lower dome, wherein the upper dome has a convex surface;
• wherein the convex surfaces face each other and are separated by a gap;
• c) a horizontal flange circumscribing a bottom of the lower dome.