Ghid de montaj sindrile bituminoase IKO ARMOURVENT MULTI
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Armourvent® Multi
application guide
CONTENTS
Why ventilate a shingle roof
2
A balanced system:
the key to proper roof ventilation
3
Calculating the net free area of vent openings
4
Installation of IKO Armourvent® Multi
6
Ridge vent installation instructions
10
Hip vent installation instructions
12
Off peak vent installation instructions
14
UK
Armourvent® Multi application guide
WHY VENTILATE A SHINGLE ROOF?
A BALANCED SYSTEM:
The Key to Proper Roof Ventilation
Unventilated shingle roofs will cause high temperatures inside. This will age the
shingles much quicker and at the same time create unhealthy, moist air to live in.
Ventilating the roof will lower the temperature of both the shingle roof and the
space directly underneath, leaving the roof structure unaffected and preventing
accumulation of moisture in the attic.
The most important factor in roof ventilation is the need for a “balanced system”.
This means for
every cm² of air exhausted, it must be balanced by providing the same
amount of air intake at the eaves.
Ventilating your roof will equalize the temperature of the outer and inner roof. Your
roof structure will then be able to withstand sudden temperature changes. Especially
those, which are created by thunderstorms during the summertime.
Armourvent® Multi
Exhaust
Ventilating the roof also prevents ice dams. Ice dams are the results of continuous
freezing and thawing of snow due to escaping heat through the roof deck being
backed up with frozen slush. If it occurs, water may be driven under the roof.
A “balanced system” of ventilation, which is the key to proper roof ventilation, allows
heat and water vapor to escape from the roof system.
Air must be able to circulate freely between insulation and the nailable roof deck, from
the eaves to ridges.
› extend the life of your roof
› increase your living comfort
› regulate the moisture in your house
Your dryer insulati
on will function
better ⇒ lower utility bills
Exhaust
Airflow
Warm Air Rises
(Thermal effect)
Airflow
Warm Air Rises
(Thermal effect)
Intake Air
At Soffit
Intake Air
At Soffit
Providing a balanced system assures that damaging heat and moisture is being vented
out of the attic, protecting the roof from premature deterioration, costly repairs.
If an attic has a properly balanced system, the airflow will move from the bottom of
the attic to the top, pushing out heat and moisture in a natural flow using air pressure,
thermal effect and diffusion.
If the system were to be unbalanced, and the Net Free Area (NFA) at the ridge is higher
than at the eave, a reverse airflow can occur causing an opposite effect to what is desired. The airflow will come from the top of the house and push down toward the eaves.
As a result, heat and moisture are not allowed to escape and additional air and moisture
can be drawn into the home.
Ventilated: lower temperature inside.
With air gap between insul
ation and roof deck:
air escapes via ridge vents,
leaving the roof structure unaffected.
Unventilated: high temperature inside.
Without air gap between insulation and
roof deck: condensation forms and the
roof structure is damaged.
Recognized by builders throughout the industry, are the standards for static ventilation,
as found in the requirements for proper ventilation. These requirements call for a ratio
of 1:300. This means one cm² of ventilation for every 300 cm² of insulated roof area. In
addition, specifications for good attic ventilation require a balanced system – 50% of
the vents at the eave and 50% at the upper portion of the roof.
Armourvent® Multi application guide
-2-
-3-
CALCULATING THE NET FREE AREA OF VENT OPENINGS
The air gap between the insulation and the roof deck must be 4 to 6 cm.
Ventilation should be equally divided among the number of vents at eaves and ridges.
Air should flow in from the bottom of the roof (eaves) and out through the top of the
ro
of (ridge).
Example:
The air flow between the eaves and ridge vents must be unobstructed (by insulation or
roof beams) to ensure cross-flow ventilation.
The total required net free area (NFA) of vent openings is a function of the insulated
roof area (P) and the slope of the roof.
P
Roof area (P) = 120 m²
Roof pitch = 35°
NFA Armourvent® Multi = 275 cm²/linear m of vents
Total required NFA of vent openings: 120÷300 = 0,4000 m² = 4000 cm²
Minimum linear m of vents required over total roof: 4000÷275 = 14,54 m
Linear m of vents at ridge: 14,54÷2 = 7,27 => 7,50 m
Linear m of vents at eaves: 14,54÷2 = 7,27 => 7,50 m
Note:
P
P
Roofs with vapour barriers need 40% less ventilation. In certain regions (mountainous
areas, the coast) special building regulations may apply.
P
Armourvent® Multi
SAMPLE ROOF STRUCTURES
P
Dimensions
Roof pitch
P
Required NFA of vent openings
15° - 40°
P÷300
41° - 85°
Armourvent® Multi Plus
6 m x 22,80 cm
6 m x 28,50 cm
Monarch®
Armo
urglass (Victorian)
Superglass (-Biber)
Monarch®-Diamant
Diamant
DiamantShield
BiberShield
ArmourShield
Marathon Ultra®
(Cambridge Xpress)
15° - 60°
15° - 60°
275 cm²/m
275 cm²/m
P÷600
IKO Shingles
which may be
used
Roof Pitches
NFA per linear m
of vents
Armourvent® Multi application guide
-4-
-5-
Detail: Multivent on ridge application
(double beam)
INSTALLATION OF IKO ARMOURVENT® MULTI
Detail:
IKO Armourvent® Multi on ridge application (double beam)
Detail:
IKO Armourvent® Multi on ridge application (rafter)
Armourvent® Multi
Shingle
Nail
Shingle
Nail
Must penetrate roof deck
Must penetrate roof deck
airflow
Decking
airflow
airflow
airflow
air
ow
w
rflo
airflow
airflow
airflow
Truss
Opening
Detail: Multivent on ridge application
(double beam)
Double
Beams
Underlay
Armourvent® Multi
Must penetrate roof deck
Nail
Must penetrate roof deck
Underlay
airflow
Decking
air
w
flo
Underlay
Shingles
Roof Sheathing
airflow
airflow
Seala
nt
cut here
ai
Vent Detail
Opening
Double
Beams
Opening
Off Peak Vent can be
used at upper end of
roof for exhaust or lower
end of roof for intake.
Nail
flo
w
Armourvent® Multi
r fl
Sealant
airflow
airflow
Truss
Opening
Detail:
IKO Armourvent® Multi off peak application (intake or outlet)
Detail:
IKO Armourvent® Multi on ridge application (single beam)
air
flo
w
ai
Opening
Opening
Center
Beam
Shingle
Decking
airflow
airfl
ow
airfl
airflow
Underlay
Underlay
airflow
Nail
Armourvent® Multi
ai
ow
Underlay
r fl
Truss
ow
moisture barrier membrane
Armourvent® Multi application guide
-6-
-7-
Shingles
Detail: Clerestory (Shed) Roof
Detail:
IKO Armourvent® Multi eave application (narrow overhang)
Detail:
IKO Armourvent® Multi shed roof application
Siding
Rafter/Truss
Underlay
Sheathing
Flashing Detail
moisture barrier
membrane
Armourvent® Multi
airflow
Underlay
Flashing
cut here
Shingle
airflow
Vent Detail
Truss/Rafter
Shingle
Drip
Edge
air
Solid Sheathing
w
flo
Insulation
Fascia
Board
Siding
Armourvent® Multi
Underlay
Roof Sheathing
moisture barrier membrane
Detail:
IKO Armourvent® Multi eave application (wide overhang)
Soid Sheathing
Underlay
Shingle
Insulation
Drip Edge
airflow
Rafter/Truss
Soid Soffit
Panel
Armourvent® Multi
Armourvent® Multi application guide
-8-
-9-
RIDGE VENT INSTALLATION INSTRUCTIONS
The length of slot cut along the roof ridge controls the amount of ventilation.
Remember, for a very attractive roofline, it is recommended that
IKO Armourvents® Multi are installed along the entire ridge of the roof.
3 / End cap installation
1 / Ridge slot preparation
Install end caps. Pull apart a pre-cut section of the foam end cap found with the
IKO Armourvent® Multi. Use a utility knife, to make a cut in the moisture barrier
membrane 1,5 cm on each side, back from the end of the section.
Cut a 5 cm slot (2,5 cm on each side of ridge) along the ridge(s). For a roof with a centre
beam, a 9 cm slot should be cut (4,5 cm on each side of the ridge). A minimum of 15 cm
must be left uncut on each end of the ridge. Once the slot is cut and any overlapping
shingles covering the ridge are trimmed and removed, the ridge is ready for vent
installation.
Use Bitumious mastic, coat both sides of the moisture barrier membrane between the
foam end cap and the vent underside for a tight seal. Attach vent in the corners to the
roof and nail vent and end caps in place to roof deck. 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 1,5 cm.
2 / Vent placement on ridge
4 / Ridge shingle installation
Roll out and place the IKO Armourvent® Multi along the entire length of slot also
covering the 15 cm minimum uncut ridge on both ends. Secure at the lead edge,
inserting the end cap. Pull the vent tight and secure at about 3 m. Pull the rest of the
vent tight and secure, insertin
g the end cap. Multiple lengths of vent can be joined
by butting the sections tightly together. We require applying bitumious mastic to
the shingles, before installing the vent on the ridge. This sealant should fill any voids
between the bottom of the vent and the surface of the shingle.
Nail ridge shingles with roofing nails in a common overlapping pattern. Nails should
penetrate thewood roof deck at least 1,5 cm. The vent has been installed properly if the
bottom of the vent is flat on the roof and the peak is slightly rounded.
Armourvent® Multi application guide
- 10 -
- 11 -
HIP VENT INSTALLATION INSTRUCTIONS
The length of slot cut along the roof ridge controls the amount of ventilation.
Remember, for a very attractive roofline, it is recommended that IKO Armourvents®
Multi are installed along the entire ridge of the roof.
3 / Hip and ridge vent transition
1 / Hip slot preparation
45
cm
1
cm 5
30
cm
45
cm
To maintain structural integrity, one continuous slot is not r
ecommended on hip
applications. Start ventilation preparation by leaving 15 cm of hip uncut from where the
ridge and hip meet. Cut a 9 cm width slot for ventilation (4,5 cm on each side of the hip).
Hip slot should be 45 cm inlength, spaced with a 30 cm uncut area between each 45
cm opening. The slot for ventilation should not be cut any lower than 1/3 of the roof to
maintain a balanced ventilation system.
2 / Vent placement on ridge
Roll out and place the
IKO Armourvent® Multi
along the entire length
of slot also covering
the 15 cm minimum
uncut ridge on both
ends. Secure at the
lead edge, inserting the
end cap.
Pull the vent tight and secure at about 3 m. Pull the rest of the vent tight and secure,
inserting the end cap. Multiple lengths of vent can be joined by butting the sections
tightly together. We require applying bitumious mastic to the shingles, before installing
the vent on the ridge. This sealant should fill any voids between the bottom of the vent
and the surface of the
shingle.
Using a utility knife to trim the end of IKO Armourvent® Multi. Insert the foam end cap
under the IKO Armourvent® Multi where it is at full width. Fasten vent for hip at point
where it meets ridge. Roll out or place the vent all of the way down the hip, covering 2
pre-laid cap shingles at the bottom of the hip. Go back over hip vents and fasten at
10 cm intervals.
If the Armourvent® Multi is not being run the entire length of the hip, use the cap
shingles to create a transition. Use sealant to fill any void left between the shingles
and the remaining top layer of the vent. Be sure to apply roofing sealant to any spaces
left by cap shingle used for transition. If 2 or more sections of IKO Armourvent® Multi
are being joined together, an end cap MUST be installed into each end of the joining
sections. Repeat on all hips.
4 / Hip and ridge shingle istallation
Apply the shingles to the hip and then to the ridge. Nail hip shingles with roofing nails
in a common overlapping pat
tern. Nails should penetrate the wood roof deck at least
1,5 cm. 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.
Armourvent® Multi application guide
- 12 -
- 13 -
OFF PEAK VENT INSTALLATION INSTRUCTIONS
1 / Vent preparation
4 / Vent installation
Using IKO Armourvent® Multi Plus, peel 7,5 cm of the moisture barrier membrane away
from one entire side of the vent. Using a utility knife, cut off 7,5 cm of the corrugated air
return at one entire side of the vent.
Install IKO Armourvent® Multi Plus along the slot opening with the remaining 7,5 cm
corrugated air return placed approximately 2,5 cm below the ventilation slot. Nail down
the roll, starting with the lead edge, middle and other end through the 7,5 cm air return.
Be sure the moisture barrier membrane is pulled tight and lay a bead of bitumious
mastic, 11,5 cm above the sl
tern. Nails should penetrate the wood roof deck at least
1,5 cm. 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.
Armourvent® Multi application guide
- 12 -
- 13 -
OFF PEAK VENT INSTALLATION INSTRUCTIONS
1 / Vent preparation
4 / Vent installation
Using IKO Armourvent® Multi Plus, peel 7,5 cm of the moisture barrier membrane away
from one entire side of the vent. Using a utility knife, cut off 7,5 cm of the corrugated air
return at one entire side of the vent.
Install IKO Armourvent® Multi Plus along the slot opening with the remaining 7,5 cm
corrugated air return placed approximately 2,5 cm below the ventilation slot. Nail down
the roll, starting with the lead edge, middle and other end through the 7,5 cm air return.
Be sure the moisture barrier membrane is pulled tight and lay a bead of bitumious
mastic, 11,5 cm above the sl
... ascunde
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