Why your attic needs to be ventilated and moisture-free
A properly sealed, insulated and vented attic is truly a marvel of functional home design. Homeowners face the choice of a few different ventilation options, each with its own pros and cons. However, all properly configured attic ventilation systems share the ability to regulate temperature and enhance home comfort in any climate while reducing AC and heating costs. Rooftop ventilation is a feature you can not do without.
Strong air circulation is key
In modern attic design, achieving strong and balanced air circulation is crucial. Strong air circulation means ensuring you have enough ventilation area (NFA) relative to the size of your attic. Achieving balanced air circulation involves having an equal amount of intake and exhaust ventilation to promote optimal airflow.
Improper air circulation can result in the buildup of heat and moisture generated from everyday household activities such as cooking, showering, and the use of air conditioning and heating systems. As heat and moisture naturally rise, they have a tendency to accumulate within your attic space. This can lead to a number of issues such as mold growth, damaged insulation, and reduced energy efficiency.
Vents can expose your attic to the elements
Attic ventilation is absolutely critical to the proper functioning of your home, but in order to allow air to escape, the typical home requires a lot of vents—vents that expose the attic to attack from the elements.
40% of mold found in homes is found in the attic
When storms force rain and snow to penetrate your attic, this moisture contributes to rot, mold, and potentially the permanent destruction of expensive insulation.
Rot can cause expensive structural damage and repairs.
Mold can lead to serious health problems and, in some cases, dealing with black mold has led to the condemnation of homes (even new homes) and negative health effects, including death.
The mold remediation industry estimates that 40% of the mold found in homes is located in the attic.
Wet insulation is problematic
Many excellent insulation products on the market suffer permanent R-value reduction of up to 40% once they become wet.
Although the performance of the insulation improves as it dries, the waterborne contamination of the insulation from dirt, mold and other materials triggers an often permanent impairment of the insulating material.
Active vs. Passive Roof Ventilation
Both passive and active attic ventilation are important for a healthy, energy-efficient home.
SNOWVENTCO Snow Vents
Upper Roof Exhaust Vent
Install near roof peak to allow warm air to escape. Blocks 99% of snow, diverts rain.
Lower Roof Intake Vent
Suitable for use in place of soffit vents. Blocks 99% of snow, effectively diverts rain.
Skylite Exhaust Vent
Perfect for sheds and garages to allow light in while keeping moisture out.
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Learn How to Install SNOWVENTCO Snow Vents
Tools needed, step-by-step instructions, and videos.
Frequently Asked Questions
Roof vents are necessary in order to improve the ventilation in your attic. Adequate ventilation helps to remove excess heat and moisture from your attic, which can prolong the life of your roof and prevent damage to your attic and the rest of your home. Additionally, proper ventilation can help to prevent the growth of mold and mildew, which can be a health hazard.
There is no one "best" roof ventilation system as the appropriate system will depend on the specific needs of your home and roof. Roof vents are generally divided into active or passive systems with each system having its pros and cons.
The number of roof vents you need will depend on the size and layout of your attic. A general rule of thumb is to have 1 square foot (144 square inches) of vent area for every 150 square feet of attic space. For example, if your attic is 900 square feet, you would need 864 square inches (6 square feet X 144) of vent area. Additionally, it's important to make sure that your vents are properly placed and balanced, with an equal amount of intake and exhaust vents. This will ensure that air is flowing effectively through your attic and not creating pressure that could cause leaks or damage to the roof. Try our roof vent calculator to find the right amount of vents for your roof.
Installing roof vents can be a complex task that requires a certain level of skill and experience. It is recommended that you hire a professional roofing contractor to install your vents, as they will have the knowledge and tools necessary to do the job safely and correctly. However, if you're determined to install them yourself, take a look at our installation video for a step by step demonstration.
No, determined vermin will have a difficult time chewing through the heavy duty plastic outer shell which is much thicker than typical roof vents. If they are able to chew through the plastic they will not be able to get through the stainless steel filter. This will restrict attic access through the vent openings.
Roof vents can breathe under snow, but it depends on the amount of snow and the type of vent. SNOWVENTCO Storm Vents have been tested to allow for airflow even under heavy snowfall conditions. See the link below for video proof.
Yes, the low profile and aerodynamic design of SNOWVENTCO vents combined with heavy duty polymer outer shell mean the SNOWVENTCO vents are very resistant to high winds. Our vents have undergone testing showing that they prevent over 99% of rain, snow, and other particle penetration of attic in CAT 3 hurricane wind conditions. They are also durable enough to stay intact when faced with 120 mph winds.
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