Composition Shingle Roofing

In the Pacific Northwest, quality architectural shingles typically last 22-40 years with proper ventilation and maintenance. Premium options like GAF Timberline HDZ and Certainteed Landmark TL or Presidential TL shingles can approach 50 years in ideal conditions. Factors like roof pitch, attic ventilation, and regular maintenance all impact longevity.

Look for shingles with algae-resistant coatings (like GAF's StainGuard Plus and Certainteed's StreakFighter) and high wind ratings. Architectural shingles from GAF, CertainTeed, and Malarkey all perform excellently in our wet climate.

A typical composition shingle roof in the Seattle area costs between $12,000 and $25,000 depending on roof size, pitch, material selection, and whether tear-off of existing shingles is required. Premium materials like GAF Grand Sequoia or CertainTeed Presidential will be at the higher end, while standard three-tab shingles are more affordable. We provide free, detailed estimates for every project.

We always recommend a full tear-off. While some building codes allow a second layer of shingles, removing old materials lets us inspect the roof decking for hidden damage, install proper synthetic underlayment, and ensure a longer-lasting installation. A tear-off also prevents the added weight from compromising your roof structure.

Most premium architectural shingles come with a Lifetime Limited Warranty from the manufacturer. Certified contractors can offer warranties covering both materials and workmanship for up to 25 years. CertainTeed and Malarkey offer robust warranty programs through their certified installer networks.

Yes. Modern composition shingles include copper-infused granules or algae-resistant coatings that significantly reduce moss and algae growth. Shingles like GAF Timberline HDZ with StainGuard Plus and Certainteed's StreakFighter are specifically designed for climates like ours. Zinc strips can be installed at the ridge line for added protection, and periodic roof treatments with moss-stop powder can help maintain your roof's appearance.