Square Construction

Roofing Guide

Class 4 Impact Resistant Shingles

Texas hail country demands more than a standard shingle. Here's everything you need to know — including how to get an insurance discount for upgrading.

15–30%
Average insurance discount
Class 4
Highest UL 2218 rating
2"
Steel ball test diameter
Up to 50yr
Manufacturer warranty (certified install)

What “Class 4” actually means

The UL 2218 standard tests roofing products by dropping a 2-inch steel ball from 20 feet. Class 4 shingles withstand that impact without cracking. Standard shingles don't.

In Texas hail events, stones frequently exceed 1.5 inches. Class 4 shingles absorb that energy without fracturing — meaning no water infiltration, no hidden damage, no claim.

The insurance discount

Most major carriers — State Farm, Allstate, Farmers, USAA — offer 15–30% premium discounts for Class 4 IR roofing. On a $3,000/year policy, that's $450–$900 annually.

Ask your agent for the exact discount percentage for your policy
Get the manufacturer's UL 2218 Class 4 product certification
Submit to your carrier after installation — discount applies at renewal
Some carriers require a specific underlayment — we know which ones

Brands we install

Owens Corning Duration Storm
Class 4
Most widely installed in DFW. OC Preferred Contractor — unlocks extended warranty coverage.
TAMKO Heritage IR
Class 4
Strong performance, competitive pricing. TAMKO Edge network member. Popular in Austin.
CertainTeed Landmark IR
Class 4
Premium aesthetics, excellent color retention in Texas sun.
Atlas Pinnacle Pristine
Class 4
Best algae-resistance rating — ideal for Central Texas humidity.

Ready to upgrade?

We'll inspect your current roof, walk you through the right Class 4 product for your home, and handle the insurance discount documentation.

Free Inspection
Deep Dive
Class 3 vs Class 4: Full comparison guide →