Roofing Materials · Northern Colorado
Roofing Materials for Northern Colorado Homes
We install shingles from three manufacturers: GAF, Owens Corning and CertainTeed. Each one makes Class 4 impact-rated shingles for hail country, and shingle product and color are settled with you before the scope is final.

Fig. 01 Architectural shingles going on
Three manufacturers
The shingles we install.
Each brand carries a manufacturer’s limited warranty against manufacturing defects. Here is how that works alongside our own warranty. As a GAF Certified contractor, we can offer GAF’s System Plus Limited Warranty on qualifying GAF roof systems — ask us whether your roof qualifies.
For hail country
Class 4 impact-rated shingles.
Each of the three manufacturers makes shingles rated Class 4 for impact under UL 2218. Their Class 4 lines are:
- GAF Timberline AS II
- Owens Corning Duration FLEX
- Owens Corning Duration STORM
- CertainTeed Landmark ClimateFlex
Standard CertainTeed Landmark is a different product and is not impact-rated. If you want an impact-rated CertainTeed roof, the line is Landmark ClimateFlex.
Shingle warranties do not cover hail damage. Hail damage is an insurance matter, so here is how we document a roof for a claim.

Fig. 02 Dark shingle roof below the foothills
Choosing a shingle
From inspection to the product on your roof.
01
Inspection first
We inspect the whole roof and photograph its condition before recommending anything.
02
Product and color
You get a written scope with the shingle product and color, settled with you before it is final.
03
Impact rating
In hail country, ask whether a Class 4 impact-rated line makes sense for your roof.
04
Ask your insurer
Some insurers offer a discount for Class 4 impact-rated roofs. Colorado’s Division of Insurance suggests asking your carrier. Discounts vary and aren’t guaranteed.
Warranty
Every brand carries a manufacturer’s warranty.
Each manufacturer we install carries a manufacturer’s limited warranty against manufacturing defects, and every roof we install comes with our 10-year workmanship warranty. Shingle warranties do not cover hail damage.
Roofing material questions
What homeowners ask about shingles.
Which shingle brands do you install?
GAF, Owens Corning and CertainTeed. Their main lines are GAF Timberline, Owens Corning Duration and CertainTeed Landmark.
What does Class 4 impact-rated mean?
The shingle is rated Class 4 for impact under UL 2218. The Class 4 lines from the brands we install are GAF Timberline AS II, Owens Corning Duration FLEX and Duration STORM, and CertainTeed Landmark ClimateFlex.
Is CertainTeed Landmark impact-rated?
Standard Landmark is not. The impact-rated CertainTeed line is Landmark ClimateFlex.
Will an impact-rated roof lower my insurance?
Some insurers offer a discount for Class 4 impact-rated roofs. Colorado’s Division of Insurance suggests asking your carrier. Discounts vary and aren’t guaranteed.
Do shingle warranties cover hail damage?
No. Shingle warranties do not cover hail damage. Hail is an insurance matter. Here is what roof warranties do cover.
Are you a GAF Certified contractor?
Yes. As a GAF Certified contractor, we can offer GAF’s System Plus Limited Warranty on qualifying GAF roof systems — ask us whether your roof qualifies.
Paying for a new roof? See roof financing.