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.