Technical Specifications

Step l. Hip and Ridge Ventilation Slot
Preparation
Determine how long of a hip and ridge
ventilation slot will be required
according to 1/300 rule. The ridge and
hip ventilation slot may be pre-cut on a
new roof before or after shingle
installation or in a retrofit, the slot can
be cut from the pre-shingled roof using
a circular saw with a carbide tip blade.
(Protective eye goggles should be worn
during this process). Start ridge
ventilation slot 6" from point where hip
and ridge meet. Cut a 2" slot (1" on
each side of ridge) along the ridge(s).
For a roof with a center beam, a 3½"
slot should be cut (13/4" on each side
of ridge). If entire ridge requires
ventilation, stop ventilation slot 6" from
point where hip and ridge meet. To
maintain structural integrity, one
continuous slot is not recommended on
hip applications. Start ventilation
preparation by leaving 6" of hip uncut
from where the ridge and hip meet. Cut
a 3½" width slot for ventilation. Hip slot
should be 18" in length, spaced with a
12" uncut area between each 18"
opening. The slot for ventilation should
not be cut any lower than the top
1
∕
3
of
the roof to maintain a balanced
ventilation system.
Step 2. Vent Placement on Ridge
Roll out or place VentSure
®
rigid roll
ridge vents with Weather PROtector
®
moisture barrier along the entire length
of slot also covering the 6" minimum
uncut ridge on both ends. Multiple
lengths of vent can be joined by butting
the sections tightly together. Products
with VentSure
®
rigid roll with Weather
PROtector
®
moisture barrier should
have an end cap inserted at the end of
each section. (See Step #3)
Step 3. End Cap Installation
Install the end caps. Pull apart a pre-cut
section of the foam end cap packaged
with the vent. For products with
VentSure
®
Rigid Roll with Weather
PROtector
®
, using a utility knife, make a
cut in the VentSure
®
rigid roll with
Weather PROtector
®
material on each
side of the vent, back from the end of the
roll. (See Fig. 3 inset). Using construction
adhesive or sealant caulk, coat both
sides of the foam material to ensure a
proper seal. Place the foam end cap on
top of the VentSure
®
rigid roll ridge vents
with Weather PROtector
®
material where
it has been cut back at the end of the
vent. (See illustration #3). Attach vent to
the roof deck by driving a nail in each of
the two corners on both ends of the vent.
Also, drive two nails through the vent and
foam end cap to hold foam in place on
the ends of the ridge only. Nails should
penetrate the wood roof deck at least ¾"
into the deck, where the deck is less
than ¾" thick the fastener should be
long enough to penetrate fully and
extend at least ⅛" through the roof deck.
It is important when installing this vent
that you maintain the pitch of the roof.
The vent has been installed properly if
the bottom of the vent is flat on the roof
and the peak is slightly rounded.
Note: For “Class A” Installation Only
For Class A, VentSure
®
rigid roll ridge
vents with Weather PROtector
®
moisture
barrier installation follow steps 1, 2, 3 as
stated above. Once the vent has been
installed, use a Utility knife with a hook
blade and remove the corrugated plastic
center section of the vent. (See Fig 3B)
Do this for the Hip and the Ridge. This
modified installation meets the
requirements for UL790 Class A,
standard installation meets the
requirements for UL790 Class C. Follow
remaining steps 4, 5, 6 as stated.
Where can VentSure
®
rigid roll ridge vents with Weather PROtector
®
moisture barrier be installed?
Chimney on Roof
• Saw slots to within 12" of any chimney located
on ridge as shown and butt ridge vent flush
against chimney
Hip Roof
• Saw slot on center of ridge to within 6" of
each end as shown
• Run ridge vent across complete length of
ridge
“T” & “L” Roof
• Saw slots to within 12" of ridge intersection
points as shown
• Install ridge vent completely across ridge on
long side and butt ridge vent on the short run
against the side of the long run
6" 6"
12"
12"
6" 6"
Slot Length
Ridge Vent Length
6"6"
12"
12"
12"
Note: To prevent leakage and preserve roof line aesthetics, always leave at least 6" between ridge slot and end of the ridge. See above illustrations.
Installation Instructions for VentSure
®
Rigid Roll Ridge Vent with Weather PROtector
®
Moisture Barrier
6"
12"
18"
18"
1 2
3
3B