202-INST-US-001 v1.0
–
11 Dec 2020
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Page 18 of 25
Figure 9b
–
Head flashing installed
Step 10
–
Install the Head Apron
Place the head apron in position (use the roofing underlay supplied as part of the flashing kit if specified, otherwise use roofing underlay
of at least 39-
3/8”
in width). The apron should cover the top of the head flashing entirely. The bottom edge of the apron should lap over
the head flashing by at least
2”
, and the top edge should lap under the underlay of the roof by at least
2”
. If the underlay
supplied/recommended does not reach, then a second piece should be used as an intermediary, lapped over the original piece and
lapped under the underlay of the roof.
The head apron must be lapped into the roof underlay as described in this step. Failure to lap the apron properly may
result in water ingress above the product. This lapping is also shown on the sales drawing.
Figure 10
–
Head apron installed
Head flashing tucked into head gutter of product
Head apron lapped
over the head flashing
