UL 2218 drops a two-inch steel ball from twenty feet onto the same spot on a shingle twice, then checks the back of the mat for any crack. Survive it and the shingle is Class 4 — the highest impact rating there is. In a city with 193 radar-detected hail days since 2014, that rating is the single most consequential choice on the roof.
What the upgrade costs
Roughly 20 to 25 percent over a standard architectural shingle. On a typical Olathe house that is about $2,500 to $4,500 extra: $11,500–$19,500 for standard against $14,000–$24,000 for Class 4.
What you get back
The premium credit. Essentially every carrier writing in Kansas offers one, because an impact-resistant roof saves them claims. It applies to the wind-and-hail portion of your premium and typically runs about 10 to 30 percent of that portion. Kansas credits are among the more generous in the country for the obvious reason.
The deductibles you do not pay. This is the part people leave out of the arithmetic, and in Olathe it is the biggest number. If a Class 4 roof survives two storms over its life that would have totalled a standard roof, and your wind-and-hail deductible is 1 percent of a $400,000 dwelling, that is $8,000 you did not spend — plus two roof replacements you did not live through.
Longer life. A roof that is not being bruised every other season simply lasts longer. We plan on 22 to 30 years for Class 4 in this climate against 16 to 22 for standard architectural.
Working out whether it pays on your house
- Ask your agent what credit they give for a UL 2218 Class 4 roof, in dollars per year, and what documentation they need.
- Check your wind-and-hail deductible — flat or percentage, and what it comes to.
- Get both roofs quoted so you know the actual gap rather than a rule of thumb.
- Divide the gap by the annual credit for the simple payback. Then consider that in this city you are likely to face at least one claim-level hail event per decade.
For most Olathe houses the credit alone pays back a meaningful share over the roof's life, and the avoided deductibles decide it. The honest exception is a homeowner who expects to sell within a few years — the credit does not follow you, though a transferable Class 4 certificate is a genuine selling point.
Details that catch people out
- Ridge caps must match. A Class 4 field with standard hip and ridge caps leaves the most exposed line unprotected, and some carriers check.
- Some carriers want their own inspection or a photograph of the wrapper before granting the credit. Ask first.
- Class 4 is not hail-proof. Very large or wind-driven stones can still damage one, and your gutters, vents and flashing dent at sizes the shingle shrugs off.
- SBS-modified versus mesh-backed. Both can achieve Class 4. SBS-modified shingles stay flexible in cold, which matters in a Kansas February; mesh-backed products pass the test with a reinforcing layer. We will tell you which product we are quoting and why.
Related questions
Do I have to wait for a roof replacement to get the credit?
Yes - the credit is for the roof covering, so it starts when the Class 4 roof is installed and documented. If your roof is nearing end of life, or you are replacing after a storm, that is exactly the moment to price the upgrade, because you are paying the labour and tear-off either way.
Can I get Class 4 on an insurance claim?
Your carrier pays to replace what you had. If you had standard architectural shingle, they pay for standard architectural shingle, and you pay the difference to upgrade to Class 4. That is usually the cheapest moment you will ever be offered the upgrade, since all the other costs are already covered.
Which brands make Class 4 shingles?
All the major manufacturers have at least one Class 4 line, and several have more than one. What matters more than the badge is the construction - SBS-modified products stay flexible in cold weather, which is a real advantage in a Kansas winter. We will quote a specific product and tell you exactly why that one.