Impact-resistant and metal roofing in Littleton

Why impact resistance is the whole conversation here

Metal roofing Littleton homeowners ask about, and Class 4 shingles, solve the same problem from two price points: hail. A standard architectural shingle bruises at about 1-inch hail. The South Metro sees 1-inch hail somewhere most summers and 2-inch hail every few years. That's why so many homes in Highlands Ranch and Centennial are on their third roof since 1995.

UL 2218 Class 4 is the test that matters. A 2-inch steel ball is dropped from 20 feet onto the product; if it doesn't crack, the product passes. Both shingles and metal panels are rated to it. The Insurance Institute for Business & Home Safety has started a tougher test that includes real-world hail shapes, and the best products pass both.

Class 4 shingles

An impact-resistant shingle is an architectural shingle with a polymer-modified asphalt (SBS) or a reinforced mat, so it flexes instead of fracturing. The good ones — Malarkey Vista and Legacy, Owens Corning Duration Flex, GAF Timberline AS II, CertainTeed NorthGate — look identical to a standard architectural shingle from the street.

• Cost: $30–$80 per square more than standard architectural, so $900–$2,400 more on a typical Littleton roof.
• Insurance: Most Colorado carriers discount the wind-and-hail portion of the premium for a documented Class 4 roof. The discount ranges from small to substantial depending on the carrier; ask your agent for the number in writing. The install has to be documented with the product name and a certificate, which we provide.
• Limits: Class 4 is not hail-proof. Golf-ball hail will still leave cosmetic marks, and some policies now exclude cosmetic damage on Class 4 roofs — which is fine, because cosmetic marks don't leak. What you're buying is a roof that turns a total-loss storm into a repair, or nothing.

Standing-seam metal

For homeowners who plan to stay 15 years or more, or who have filed two hail claims already, standing seam is the end of the cycle. Panels are 24- or 26-gauge Galvalume steel with a Kynar 500 finish, clipped to the deck along their full length with no exposed screws. A properly installed standing-seam roof lasts 40–60 years in this climate.

• Cost: $1,200–$2,000 per square installed, so $30,000–$55,000 on a typical two-story. Roughly two to three times an architectural shingle replacement.
• Hail: 24-gauge steel takes 1.5-inch hail without a functional mark. Bigger stones can dent it — the roof still doesn't leak, but some policies exclude cosmetic dents on metal, so read yours.
• Wind: Continuous clips and no leading edges. The 90 mph Chinook nights that peel shingles off Ken Caryl and Roxborough don't move a standing-seam panel.
• Snow: Metal sheds snow fast, which means snow guards over doors, walks and the gas meter, and a plan for where the slide lands. We spec them on every job.
• Sun: Kynar holds color at altitude. The cheaper polyester finishes chalk in under ten years here.

Exposed-fastener panels (screwed through the face with gasketed screws) run $800–$1,300 per square and are fine on a garage, barn or shed. On a house, the 2,000 or so gaskets each become a maintenance item around year 15, and our UV is hard on them. We'll do it if you ask, and we'll tell you why we'd rather not.

Stone-coated steel and the shake look

A lot of Ken Caryl and Bow Mar homes were built with cedar shake, and many HOAs still want that look. Stone-coated steel panels (DECRA, Boral, Unified Steel) give a shake or tile profile in Class 4 steel at $900–$1,500 per square. They solve the hail problem and the wildfire problem — Jefferson County's foothills neighborhoods are in a wildland-urban interface, and a Class A fire-rated roof matters there.

What the job involves

A full tear-off (we don't install metal over shingles on a house — the old roof holds moisture against the deck), decking repairs, a high-temperature synthetic underlayment rated for metal, then panels formed on site or shop-cut to your roof's lengths. Trim, ridge and flashing are matched metal. A 2,000 sq ft home takes three to five days.

Trade-offs, honestly

Metal is louder in heavy rain and hail than shingles unless the attic is well insulated. The color you pick is the color for 40 years. HOAs in Highlands Ranch and some Centennial subdivisions require approval and sometimes limit metal to specific profiles and colors; we handle the submission. And if you're selling in three years, a Class 4 shingle roof gets you almost all of the insurance benefit at a fifth of the price, and we'll say so.

The pricing page puts Class 4, standard shingle and metal side by side, and a roof inspection will tell you whether your decking and framing are ready for metal.