Roofing Ventilation

Ventilation is very important to preventing problems with your roof. Attic ventilation extends the life of your roof. Proper ventilation will keep the roof dry and keep the temperature differences nominal. Trapped heat and moisture will cause damage to the roof and cause condensation, which may look like leaks. Ventilation keeps your home feeling properly circulated and also reduces energy costs. A few simple vent or fan installations will help to improve the ventilation of your attic and prevent problems relating to the roof.

Improper ventilation can cause the plywood to warp or bend. Circulating air will help prevent this from occurring. Water vapor will cause metal shingles to rust. Flashings and nails may also rust. You will have to replace the rusty nails or shingles. Increase moisture will increase the growth of mold, mildew or fungus on the shingles. These moldy shingles will have to be replaced. Problems with mildew that are ignored can cause health problems and you will be sick more often. Worse, the entire roofing system and supports could break before it is supposed to, costing even more money to fix. Ice dams will also occur in poorly ventilated roofs, resulting in leaks and damaged shingles.

Soffit shafts and ridge vents will improve ventilation in the home. There are two types of vents: inlet and outlet vents. Intake vents are located at the eaves. They let air inside the attic and under the roof. The cold or warm fresh air is introduced inside. The outlet vents located near the ridge line bring old air outside. Both are necessary for proper ventilation in the home. The effect is called the Stack Effect, which takes advantage of thermal pressure to keep old and new air circulating. This circulation also regulates the temperature and reduces shock. Shock is caused when the temperature drops significantly in a short period of time, and the roof shingles are unable to gradually cool down in time. The result is often cracked or warped shingles and the will need to be replaced.

With only one inlet and outlet, or neither, you will face the problems listed above, and possibly more. Proper ventilation is also necessary for the people living inside the house. You will notice a poorly ventilated home because it will feel stuffy and no air will circulate. Also, mildew may be causing the people living inside the house to get sick for no reason. All it takes is some ventilation to prevent these problems. You need free air flow to properly circulate the air. Proper ventilation also reduces energy cost, saving money in the long term. Attic fans are useful for ventilation and can be installed easily.

Proper Attic Insulation and Ventilation Is Essential for Energy Efficiency

When it comes to a home improvement that reduces energy use and improves the interior comfort of the home environment, many first look to energy efficient air conditioning and heating units as the answer. Energy Star HVAC units are indeed energy savers. They are also very costly investments and even those have limited effectiveness if other areas of the home where heat is gained or lost are not also addressed. The place to begin is with the attic.

Attic insulation and ventilation is a critical part of energy conservation in a home. Significant heat enters the home through the attic in summer and heat is lost from the attic in the winter. Traditional attic insulation materials such as fiberglass and cellulose help to slow the process, but they do not stop it since they retain heat that ultimately passes through. Adding a double-sided radiant barrier to attic ceilings or even over the top of the traditional insulating material will prevent most of the heat from entering the material in the first place, helping it work more efficiently and enabling your interior climate system to work less hard with less energy needed.

Adequate attic ventilation is equally important to prevent heat and moisture from being trapped in the attic. Keeping the air circulating properly in the attic also aids in preventing unwanted heat gain and loss and prevents damaging moisture from rotting wood and promoting the growth of mildew and molds. If you are looking to make a home improvement that pays for itself in reduced energy usage as well as one that protects your most valuable investment, call a roofing contractor to assess the insulation and ventilation in your attic first.

The Benefits of Proper Attic Ventilation

Improve Your Home’s Energy Efficiency
The reduced temperature in your attic will also assist your air conditioner by keeping the ductwork and the air inside cooler. The resulting effect will be cooler air flowing through your HVAC system and reduced strain on your a/c unit.

Extend the Life of Your Roof
When your attic heats up, the roofing underlayment under your roof shingles can also heat up and, over time, become brittle and ineffective. By lowering your attic temperature you can extend the life of your roof and save the expense of repairs and replacement.

Keep it Cool in the Summer
During the peak summer months, your attic’s temperature can rise to 160° or more. This heat build-up can then raise the temperature inside your home and increase the amount of electricity used by air conditioners and other cooling equipment.

Installing a Solar Attic Fan will help remove the heat build-up in your attic and bring your attic’s temperature down closer to the ambient outside temperature.

The reduction in attic temperature will also benefit the homeowner by preserving and extending the life of the roofing and attic construction materials. Additionally, hot air in your attic can then heat the metal exterior of your HVAC ductwork and consequently heat the air passing through it, causing your air conditioner to work even harder.

Remove Moisture and Reduce Harmful Mold and Mildew

In the winter, warm moist air rises from the inside of your home and collides with the cold underside of the roof. U.S. Sunlight Solar Attic Fans provide the air circulation which prevents the moist air from condensing on the surface, keeping your attic drier and helping to prevent mold and mildew from forming inside your attic and ice damming on your roof.

Moisture in the attic can also lead to other troublesome problems. Humidity can cause saturated insulation, sheetrock pops and truss uplifts, which can cause damage and cracks to the drywall inside your house.

Solar attic fans and solar powered gable vents are both great ways to effectively ventilate your attic while saving money on electricity.

Prevent Ice Damming
If you live in an area that has snow, the warmer attic air will heat the roof and melt the snow which drips to the eaves where it can refreeze as ice and form ice-dams under the eaves. These ice-dams will cause water to work back up under the shingles into the attic and down to the ceiling.