Single ply modified bitumen roof

Roofing · Modified Bitumen · printed page 24 (PDF page 25)

Original page Sign in to save

Book index entries

Single-ply Single-ply Modified Bitumen Roof Modified Bitumen Roof

Text in the illustration

surface of membrane should be protected from ultraviolet light by:
-a granular surface
-liquid coating (eg. reflective )
-a foil surface
-ballast (eg. gravel)
39" (1 m)
membrane may be peel-and-stick mopped or torched
typically installed with a 3" overlap at the edges and sides
roof sheathing
downward slope of roof

Generated explanation

The illustration shows parallel strips of single-ply modified bitumen roofing laid over roof sheathing, with several ends curled back to expose the underlying assembly. The membrane strips are marked as 39 inches (1 m) wide and typically installed with 3-inch overlaps at the edges and sides. An arrow identifies the downward slope of the roof. Annotations identify peel-and-stick, mopped, or torched installation methods and specify ultraviolet protection using a granular surface, liquid coating, foil surface, or ballast. No defects are depicted.

Components

modified bitumen roofing membrane membrane overlaps roof sheathing membrane protective surfacing

Materials

modified bitumen granular surfacing liquid coating (noted option)foil surfacing (noted option)gravel ballast (noted option)

Related illustrations

0099

Staggering side laps in single ply modified bitumen roofs

· p. 25

The illustration shows overlapping strips of single-ply modified bitumen roofing over roof sheathing, with several edges lifted to reveal the layers. A circled area highlights staggered lap joints in adjacent rows, which

0098

Two-ply modified bitumen roof

· p. 25

The illustration shows a two-ply modified bitumen roof assembly over roof sheathing. Partially rolled-back cap sheets expose the underlying base sheet and its overlapping seams. The cap sheet is shown with a granular sur

0105

Modified bitumen roof/wall flashing

· p. 26

The illustration shows a modified bitumen roof-to-masonry-wall flashing assembly in section, with an inset locating the flashing along a building wall. Modified bitumen base flashing overlaps the roof membrane and turns

0109

Modified bitumen roof/wall flashing

· p. 26

The illustration shows a low-slope roof meeting a brick wall, with an overview and an enlarged flashing section. A four-ply roof membrane and flood coat or asphalt lie over roof sheathing supported by a roof rafter. Two