HERE'S A BRIEF OVERVIEW OF YOUR OPTIONS:
Experience in roof inspections following hail storms has educated our roofing contractors about how hail damage affects different roofing materials. Not surprisingly, hail damages different roofing materials in different ways.
Roof hail damage can also vary greatly from one part of a house’s roof to another. This variation is due primarily to the wind that drives the hail. A glancing blow will do less damage than hail that impacts the roof at close to 90 degrees.
RIDGE VENTS
Installed along the roof peak, ridge vents are probably the most important vents in
any “passive,” or non-electric, roof ventilation system. Hot air that accumulates
inside the attic rises by convection and escapes outside through ridge vents.
As hot air escapes, fresh outside air is drawn into the attic through soffit vents,
which are found on the underside of roof overhangs.
On an asphalt shingle roof, ridge vents are usually covered by a layer of shingles.
The warmest air in the attic rises naturally to the roof peak and escapes outside
through the ridge vents. Not always easy to see, the openings for a ridge vent are
the continuous space on either side of the ridge cap.
SOFFIT VENTS
Soffit vents run parallel to the eaves along the soffit. These vents work with ridge and gable vents
to promote good roof ventilation. Installed along the eaves of the roof, these vents are usually in
the form of grilles that run the length of each soffit. Soffit vents may run continuously under eaves,
or rectangular or circular vents may be installed in soffits when a continuous strip-type vent is omitted.
By admitting outside air into the attic as warmer air leaves the attic through higher vents, soffit
vents play a major role in effective roof ventilation.
GABLE-END VENTS
Installed near the peak of a gable end, this screened vent can allow hot air to leave the attic or fresh
air to enter, depending on prevailing breezes and temperature conditions. If attic airflow is insufficient,
your roofer may recommend a gable end vent such as the one shown.
POWERED ATTIC VENTILATORS (PAVS).
Sometimes referred to as attic fans, PAVs come in several forms. Some are designed to be mounted on the roof,
while others mount in the attic floor or the gable end. All PAVs contain an electrically powered fan, usually
controlled by a home interior thermostat, that exhausts hot air from the attic on hot summer days.
A PAV should not be necessary if a roof has properly sized and installed ridge and soffit vents. While
a PAV will definitely exhaust hot air from the attic during hot weather, it consumes electricity, and can
actually suck cooled air from the living space through leaks in the attic floor.
For this reason, many home energy experts recommend passive roof ventilation over active ventilation with
a PAV. After addressing ridge and soffit roof vents, a PAV can be installed as a last resort to cool your
attic.
SOLAR-POWERED VENTS
Some electrically powered roof vents don’t need to be connected to your wiring system. Instead, power
is supplied by a small solar photovoltaic panel mounted on the vent. These units are designed to be mounted
on the sloped section of the roof. The solar panel must be able to receive direct sunlight, which is
exceptionally easy to accommodate on a Colorado home.
While a solar-powered roof vent saves money by utilizing “free” electricity from the sun, it won’t operate at
night or anytime that sunlight isn’t available.
SLANT-BACK VENT
Slant-back roof vents offer superior versatility because they can be installed on any roof pitch.
They are ideal for preventing water infiltration, blocking leaves and other debris from entering
the attic, and keeping out rodents and insects.
The slanted design of the vent allows for maximum airflow to help remove excess heat and moisture from
the attic while providing exceptional weather protection. While other vents operate almost in the same
manner, slant-back vents are a popular choice for their durability. Many leading manufacturers offer
slant back roof vents made from strong materials, including aluminum and galvanized steel.
ROOF VENT SYSTEMS
Proper roof ventilation can improve airflow, lower attic temperatures, reduce moisture buildup, and help extend the lifespan of your roofing system.