Architectural and Engineering Design Standards

SECTION 07550

MODIFIED BITUMEN MEMBRANE ROOFING (SBS)

Modified Bitumen Membrane Roofing (SBS)

UIHC #20X-0XX 07550-12

2. Torch-apply to substrate by heating bitumen by heating membrane in accordance with
   manufacturer’s recommendations. Applications between membrane plies shall be
   such as to produce voidless coverage. Embed plies in the bitumen.


3. Do not walk on plies on plies while the bitumen is still fluid.


4. Asphalt flow of a minimum ¼ inch beyond lap line shall result during application.
   Apply loose granules in asphalt flow immediately to ensure proper embedment. Roll
   lap with a 20# steel roller. Roller shall not be more than 5 feet behind torch during
   welding process.


5. The completed roof system shall be free of voids of blisters.


6. Defects in the application such as voids, fishmouths, physical damage, loose or dry
   laps, non-approved materials, etc. shall be repaired by the Contractor as
   recommendedby the membrane manufacturer at no cost to the Owner.

3.08 APPLICATION OF MODIFIED BITUMEN FLASHING MEMBRANE (REROOFING)

A. Provide modified bitumen flashing in the angles formed where the roof deck abuts walls,

curbs, ventilators, pipes and other vertical surfaces, and where necessary to make the work

watertight. Modified bitumen flashings are as recommended and provided by the membrane

manufacturer.

B. Apply one-ply of modified bitumen base-ply and one ply of modified bitumen finish-ply

membrane at all flashing locations. Apply in accordance with manufacturer's installation

instructions. Apply flashing by method (torch applied) as recommended by the membrane

manufacturer.

C. Install flashing in accordance with the details shown on the plans or with the manufacturer's

published standards whichever is more stringent.

D. All perimeter flashings shall conform to Factory Mutual (FM) Loss Prevention Data Sheet 1-

49.

E. Side and end laps shall be overlapped a minimum of 4". All flashings shall extend a minimum

of 6" onto the field of the roof. Selvage edge of membrane shall not be exposed.

F. Flashing membrane should not be stretched when applied.

G. All curbs and walls shall have cants.

H. Curb and parapet flashings shall be fastened at top at 6" oc. with 1" diameter cap nails.

I. All flashing materials shall be 100% bonded to walls, curbs, edges, and other surfaces being

flashing.

J. All raised flashings shall be a minimum of eight (8) inches above the surface of the finished

roof surface.

November 1, 2016