Roofing felt is a vital component of any roofing system. It serves as a protective barrier between the roof deck and the shingles, providing an extra layer of insulation and preventing water infiltration. However, extreme weather conditions, such as ice and freezing temperatures, can pose a threat to the integrity of the roofing felt. In this article, we will explore the potential risks and damages caused by ice to your roofing felt and discuss preventive measures to keep your roof in optimal condition.
Understanding Roofing Felt
Roofing felt, also known as roofing underlayment, is a flexible waterproof material commonly made from fiberglass or polyester saturated with bitumen (asphalt) and other additives. It is usually installed directly onto the roof deck before the installation of shingles or other roofing materials. The roofing felt provides multiple benefits, including protection against moisture penetration, added insulation, and a smooth surface for shingle installation.
The Impact of Ice on Roofing Felt
1. Ice Dam Formation
One of the main concerns regarding ice and roofing felt is the formation of ice dams. Ice dams occur when snow on the roof melts due to warm air escaping from the attic. As the melted snow reaches the colder edges of the roof, it refreezes, creating ice dams. These ice formations can obstruct the regular flow of water, leading to standing water on the roof. Eventually, this standing water can seep underneath the roofing felt and potentially cause damage.
2. Expansion and Contraction
Another way ice can damage roofing felt is through the freeze-thaw cycle. When water penetrates the roofing felt, it can freeze during cold temperatures, causing the water to expand. This expansion puts pressure on the roofing materials. As the ice thaws, the water contracts, which can lead to the displacement of roofing shingles and roofing felt. Over time, this continual expansion and contraction can weaken the roofing felt, making it susceptible to tears and leaks.
Preventing Ice Damage to Roofing Felt
1. Insulate and Ventilate Your Attic
Proper insulation and ventilation of your attic is crucial in preventing ice dams and reducing the formation of ice on your roof in the first place. By minimizing heat loss from your home, you can help maintain an even roof temperature, preventing snow from melting and refreezing into ice dams. Adequate insulation and ventilation will also help regulate the temperature and humidity levels in your attic, reducing the risk of condensation that can damage the roofing felt.
2. Install Ice and Water Shield
For enhanced protection against ice damming and water infiltration, consider installing an ice and water shield. This self-adhering membrane is designed to create a watertight barrier beneath the roofing felt. It provides an extra layer of defense against ice and water penetration, reducing the likelihood of damage to the roofing felt and other roofing components.
3. Clear Snow and Debris Regularly
Removing accumulated snow and debris from your roof can help prevent ice dam formation and reduce the weight load on the roofing felt. Use a roof rake or hire a professional to safely clear snow from your roof, paying particular attention to areas prone to ice damming, such as valleys and gutters. Additionally, keeping your gutters clean and free of debris will ensure proper water drainage, reducing the risk of ice buildup and subsequent damage.
While roofing felt is designed to withstand various weather conditions, including ice, it is not impervious to damage. Ice dams and the freeze-thaw cycle can potentially compromise the integrity of the roofing felt, leading to leaks and other roof-related issues. To prevent ice damage to your roofing felt, it is essential to prioritize proper insulation, ventilation, installation of an ice and water shield, and regular maintenance. By taking proactive measures, you can protect your investment and ensure the longevity of your roof.