-Measure vent opening diameter and cut hole in roof same size.
-Bend all 4 sides of hole in roof then roof vent will slip
next to these.
- Roof around and fasten to roof.
Why
is Attic
Ventilation Important!!
Most roof estimates will
need to take into consideration adding the correct roof attic
ventilation system.
With out the proper Attic
Air Ventilation, your home can become quite uncomfortable, it can
also make temperatures rise so high that it might possibly damage
the roof structure, which could include voiding the roofing
warranty.
With the proper air
ventilation system you will receive maximum
air exchange, which is a balanced flow of intake and exhaust
air moving though the attic.
Types of Attic Exhaust Vents:
We are going to focus
only on Attic Exhaust Vents, which directly relates to giving roof
estimates, all new roofs will need the proper attic ventilation
system. Providing the customers with there options of the different
types of attic exhaust vents could be the deciding factor as to who
gets the job, plus it makes you look good. Over whelming the
customer with knowledge is a plus!!
The Attic Exhaust Vents
we are going to focus on include the following:
- Ridge Vents
- Power Vents
- Static Vents
Ridge Vents
installs on the peak of the roof allowing exhaust ventilation all
along the ridge line from end to-end. There a many different types
of ridge vents available some we prefer are the shingle over ridge
vent it can be roofed over with ridge like the rest of the roof.
Installing: The sheathing
along all the top ridge lines will need to be cut back where the
ridge vent will be installed , to allow the hot air to escape
thought to the ridge vent.
Power Attic Vents The two types of power attic vents we'll
focus on are electric and solar.
Electric power attic
vents are
thermostatically and humid statically controlled to monitor heat and
moisture amounts inside the attic.
Installing: Cut a hole in
the sheathing, cover it with the vent and wire the vent to an
electrical source.
Solar power attic vents
operates during
the day and gets is power from the sun and uses no electricity.
Installing: Cut a hole in
the sheathing and cover it with the vent, no wiring needed.
Static attic vents that we are going to cover include the
dormer/louver static attic vent and the air wind turbine static
attic vent.
The Dormer/Louver vent
is a vent that covers a
hole cut in the sheathing to allow the hot air to escape.
The Wind Turbine vent
also covers a hole cut
in the sheathing to allow the hot air to escape. These vents spin
and vent the air through natural force out of the attic.
Evaluate your customers needs:
To know what type of
attic ventilation system best fits your customer, you should
determine the square footage of your customers attic. This will help
you to determine the correct amount of vents to install per roof
side(s).
Note: You need one square foot of vent area for each 150
square feet of attic floor space.
The minimum is one square
foot for every 300 square feet of attic floor space if there is a
vapor retarder or the space is balanced between the ridge and intake
vents.
Both inlet and outlet
vent areas should be equal in total square feet of vent area. If one
has to be larger, it should be the exit or exhaust vent at the top.
If your roof pitch is 7/12 to 10/12, plan to add 20% to your
calculation for vent requirements; 30% for roof pitches of 11/12 and
steeper.
Common Mistakes
Don't use a combination of different types of exhaust vents,
like power vents with ridge vents. In this case, competing vents
pull air from each other instead of soffit vents.
Don't underestimate your ventilation needs. Remember that 15
roof vents or 5 turbine vents would be needed to provide the
same ventilation as 42 feet of ridge vent.
It is of no use to install exhaust vents without adequate
intake. An effective balance of intake and exhaust must be
achieved to properly ventilate the home. The flow of air in your
attic is limited to the amount of intake.
Don't install a ridge vent that doesn't have an external
baffle to increase airflow and protect from weather
infiltration.
installs on the peak of the roof allowing exhaust ventilation all
along the ridge line from end to-end. There a many different types
of ridge vents available some we prefer are the shingle over ridge
vent it can be roofed over with ridge like the rest of the roof.
are
thermostatically and humid statically controlled to monitor heat and
moisture amounts inside the attic.
operates during
the day and gets is power from the sun and uses no electricity.
is a vent that covers a
hole cut in the sheathing to allow the hot air to escape.
also covers a hole cut
in the sheathing to allow the hot air to escape. These vents spin
and vent the air through natural force out of the attic.
