Should I Upgrade My Shingles to Class 4 Impact Resistant?
That Oklahoma Weather…
If you have lived in Oklahoma for more than a few years, you know the weather can be completely unpredictable. One day the sun is shining and the next there are 30MPH winds and freezing rain. Oklahoma is also well known for it’s tornado-like wind and hail storms. Ultimately, all of these weather patterns effect the lifespan on your roof.
UL Classifications
Laminated composite shingles are made up of a fibrous matting that is coated with asphalt and ceramic granules. These layers give the roof added protections from weather and other debris. However, over time they can be weathered away in the form of granule loss, blistering, creasing, and hail damage. How do we determine the strength of these layers? Luckily the UL (Underwriters Laboratories) has done the testing on each class of shingle. Here’s what they found:
Shingles are classified from 1 to 4 based on a simulated hail test by dropping steel balls of different diameters twice in the same spot on a shingle.
Class 1: Ball diameter 1.25”, no cracking
Class 2: Ball diameter 1.50”, no cracking
Class 3: Ball diameter 1.75”, no cracking
Class 4 (Impact Resistant): Ball diameter 2.00”, no cracking
Based on these findings, your standard 30 year composite shingles can withstand smaller hail stones up to 1.5” when hit in the same spot. However, to avoid damage with larger hail, an impact resistant shingle is necessary.
Considerations (Good & Bad)
With the exception of a few, Class 4 shingles are typically heavier and thicker than Classes 1 through 3. As we know from above, shingles are made in layers. A thicker and heavier layered shingle is not going to wear down as quickly or as easily as an impact resistant shingle, giving you a longer lasting roof.
We already know that they can withstand larger hail, but also have a stronger seal to withstand stronger Oklahoma winds.
Standard architectural shingles (Class 1-3) can withstand wind gusts from 60-90 MPH.
Impact resistant shingles (Class 4) can withstand wind gusts from 110-150 MPH depending on the shingle.
Although, just because the shingles will sustain, does not mean that the roof accessories will follow suit. Minor repairs might be needed before having to replace an impact resistant roof. IR roof replacements are also much more difficult to get paid for through insurance because of their durable qualities. So unless a big storm rolls through, you might be stuck with some out of pocket expenses.
How Much Is This Going To Cost Me?
Impact Resistant shingles are typically a 25-35% price increase compared to standard architectural shingles. Considering the added longevity and durability of the superior shingle, it might be worth it.
Pro Tip: Check with your insurance carrier before installing an impact resistant roof. You may qualify for a discount on your yearly premium, adding even more back into your budget.
So, Is It Worth It?
Now that you are an expert in the classifications of asphalt shingles, you and your roofing contractor can properly discuss if making the upgrade to impact resistant shingles is what is best for your property.
For more answered questions, tune in weekly to learn more. In the meantime, leave a comment and let us know other questions you might have!