There are so many unnoticed issues and concerns that arise
on a building's attic or roof cavities with poor ventilation systems. For this
reason, it is important to learn some of the requirements to eliminate mold or
mildew problems caused by excess moisture and other causes that will affect the
lifespan of a housetop covering.
Importance
It is important to be aware of and concerned about how heat
and moisture can get trapped in attic spaces, damaging shingles as well as
sub-roofing by using roof ventilation
systems. For instance, a cathedral type ceiling without adequate passage in
the soffit and underside sheathing will eventually encounter rot, insect
damage, major condensation and even severe structural damage. For such type of
ceiling design, it is important to ensure adequate air passage through the
attic space. Soffit air passages that are blocked by insulation can simply be
corrected by installing soffit vent baffles at the eaves between every set of
rafters.
Configuration
Alternatives
For structures lacking intake or exhaust pathways, a soffit
intake and a ridge line outlet should be added to provide an air passageway up
to the roofs decking. Installing ventilation systems on only one part of the
entire structure can create problems.
For example, installing only soffit intakes will yield
limited effectiveness especially in areas with varying wind direction. In this
case, it is best to install a continuous ridge air passage. Electing to have
only ridged opening passageways or gable vent only passageways will not achieve
the best system performance and most likely lead to increased energy bills. It
is better to have continuous air flow with soffit intakes and ridge outlets.
On the other hand, a roof turbine is frequently utilized to
increase air flow on difficult roofing system structures. Yet it is important
to note that a good source of outdoor air should be provided in order to
achieve the best air movement effects.
Consequences
By not having proper solarroof fan with proper intake and exhaust systems in the structure, the
following undesirable problems could occur:
1.
Structural Damage
2.
Higher Energy Costs
3.
Moisture Damage
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