Flashing Cover

There are four categories of exposure or pitch that determine the required flashing cover.

Category A:

• Low, Medium or High Wind Zones, all pitches
• Very High and Extra High Wind Zones where the pitch is equal to or greater than 10°.

Category B:

• Very High where the pitch is less than 10°, and
• Extra High Wind Zones all pitches. 

Category C:

• SED Wind Zones up to 60 m/s, all pitches.

Category D:

• SED up to 68 m/s, all pitches.

NOTE: These tables are relevant to profiles with a rib height of 17 – 34 mm. Longitudinal flashings over profiles with a rib height greater than 34 mm may have one rib overlap. Dimensions provided in these tables are nominal and may vary slightly due to differences in manufacturing processes from different manufacturers.

Ridge and Head Flashing Cover

Ridge and Head Flashing Cover

 

Ridge and Head Flashing Cover Table

Dimension	Category
	A		B		C		D
C1	130		200		200		200 + baffle
Ridge Type	Standard		Wide		Wide		Wide
First Purlin Position X for Standard Ridge
Pitch	8°	10°	15°	20°	25°	30°	35°	45°
Ridges	166	164	162	154	149	143	138	124
Hips	169	167	164	160	157	153	150	143
First Purlin Position X for Wide Ridge
Pitch	8°	10°	15°	20°	25°	30°	35°	45°
Ridges	236	234	229	224	219	213	208	194
Hips	239	237	234	230	227	223	220	213