What are impact resistant shingles — and are they worth it in Montana?

Impact resistant shingles are engineered to withstand hail and debris impact better than standard shingles. They’re rated on a scale from Class 1 to Class 4, with Class 4 being the highest level of impact resistance available.

In Montana, where hail season is real and wind-driven debris is a regular occurrence, impact resistance isn’t a luxury — it’s a practical consideration worth having.

Here’s how our Owens Corning impact resistant lines break down:

Duration carries a Class 3 impact resistance rating. It’s our most commonly installed shingle and offers meaningful protection beyond standard architectural shingles.

Duration Flex carries a Class 4 rating — the highest available. It’s formulated with a modified asphalt that gives the shingle more flexibility and resilience under impact. For homeowners in areas with a history of hail activity, Duration Flex is the stronger choice.

One thing worth knowing — many insurance companies offer premium discounts for Class 3 or Class 4 rated shingles. The discount varies by provider, but in some cases it’s significant enough to offset the cost difference between a standard shingle and an impact resistant upgrade over the life of your policy. It’s worth a call to your insurance agent before your estimate to find out where you stand.