Class 4 impact resistance
Class 4 impact resistance is a rating given to roofing materials, such as shingles or tiles, that have been tested and found to have the highest level of impact resistance. The Class 4 rating is based on a standardized testing system, such as the UL 2218 test, and indicates that the material has the ability to withstand severe impact from hail or other objects without sustaining damage.
Roofing materials with a Class 4 impact resistance rating are typically made from highly durable materials, such as impact-resistant shingles or concrete tiles, that are designed to withstand the effects of severe weather and other types of impact. These materials are tested by dropping a 2-inch diameter steel ball from a height of 20 feet onto the surface of the roofing material, and are rated based on their ability to withstand the impact without cracking, breaking, or otherwise sustaining damage.
Building codes and regulations often require that roofing materials meet certain impact resistance ratings, and many insurance companies offer discounts or other incentives for buildings that are equipped with Class 4 impact-resistant roofing materials.
Overall, Class 4 impact resistance is an important consideration for roofing materials, as it can help to protect the building and its occupants from the damage and expense that can result from hail or other types of impact. Roofing materials with a Class 4 rating are designed to provide increased durability and longevity, and can help to ensure the continued performance and reliability of the roof system.
Benefits of Class 4 impact resistance roofing materials:
- Provides increased protection against hail and other types of impact
- Can help to prevent damage to the roof and underlying structure, reducing repair and replacement costs
- May qualify for insurance discounts or other incentives
- Can increase the value and longevity of the building
Many roofing materials, such as shingles, tiles, and metal panels, can be rated as Class 4 impact resistant if they pass the standardized testing requirements.
The rating is based on a standardized testing system, such as the UL 2218 test, which drops a 2-inch diameter steel ball from a height of 20 feet onto the surface of the roofing material.
Building codes and regulations may require certain impact resistance ratings for roofing materials, but it varies depending on the location and type of building.
The main downside is the higher cost compared to non-impact resistant materials. However, this cost may be offset by insurance discounts and the increased durability and longevity of the roof system.