Roof Impact Resistance Ratings

It s based on dropping a 2 steel ball from 20 onto the top of a shingle to see whether the shingle cracks.

Roof impact resistance ratings.

Overall iko shingles have poor consumer ratings but the company is working to improve their products. The difference between the ratings is that class 3 shingles withstand a smaller steel ball dropped from a lower height and likewise for class 2. Gaf ir shingles pass class 4 see illustration below the highest rating possible. When it comes to shingles class 4 shingles are the highest classification you can get when it comes to hail damage resistance.

They are associated with the ul 2218 impact test which involves dropping a two inch steel ball from 20 feet high onto the shingle and examining whether the shingle cracks or not. In an effort to cut back on claims insurance companies have started to offer incentives for homeowners choosing to install impact resistant roofing. Class 1 class 2 class 3 and class 4. The roofing materials that show the greatest resistance earn a class 4 rating.

Roofing materials are rated based on their ability to absorb high impact contact from hail or flying debris. Class 4 materials are those proven to have the highest resistance to damage caused by hail for instance. Does not have a class 4 impact resistance rating. What is impact resistant roofing.

Roof coverings must be tested and approved by underwriters laboratories ul or factory mutual fm and be rated as a class 1 2 3 or 4. Those with the least resistance earn a class 1 rating. Ul standard 2218 describes a series of tests which involve dropping steel balls from various heights onto roofing materials and then measuring whether the material cracks. Impact resistant roofing materials that have been tested to stand up to severe hailstorms.

The ul 2218 impact test was developed in conjunction with insurance industry leaders. Summarizing the result we would be looking at for a class 3 roof is earned if the sample does not crack when hit twice in the same spot by a 1 75 inch diameter steel ball. After performing the test roofing manufacturers would be scored based on the resistance of the material getting a rating from 1 least hail resistant to 4 most hail resistant. Roof coverings that have passed the ul standard 2218 test are classified by ul as either class 1 2 3 or 4.

Gaf ir shingles meet the highest impact resistance rating. While class 4 is the highest rating for impact resistance there are also lower ratings a shingle can receive such as class 3 and class 2. If you live in an area that s prone to hail this is the shingle you need. If you re considering using iko shingles on the advice of your roofing contractor it could be a decent choice but you may want to look into a higher rated.

The weakest material receives a rating of one and the material that can absorb the most impact enjoys a 4 rating. Aging or similar effects on the impact resistance of prepared roof covering materials. The benefits of northgate s sbs modified formula include a class 4 impact resistance rating the industry s highest superior weatherability and improved granule adhesion which make this arguably the most durable shingle in the industry.