Roofing Services in Thornton, WA
Thornton Roofing & Maintenance offers a complete range of roofing services in Thornton and Hamilton, Leavenworth, Metaline, Orondo, Richland. Every job gets the same attention. Big or small.
Roof Replacement
GAF Timberline HDZ with the full GAF Roof System qualifies your home for the Golden Pledge warranty. That's 25 years on workmanship and 50 years on materials, including algae protection. We install Cobra Snow Country ridge vent with external baffle, FeltBuster synthetic underlayment meeting ASTM D226 Type II equivalent, and Starter Match Pro starter strip. Every component is GAF-approved and inspection-documented.
Get a Free Quote →Roof Repair
We warranty every repair for 5 years. If the same area leaks again due to our workmanship, we come back free. That warranty is in writing and it means something because we're a local Thornton company. We're not disappearing.
Get a Free Quote →Storm Damage Repair
HAAG Certified Inspectors on staff for every storm damage assessment. We document per HAAG residential guidelines: hail hit density per test square, severity classification, functional vs. cosmetic damage distinction. Insurance adjusters trust HAAG methodology because it's the industry standard. Our supplementation process references FM 4473 hail ratings and manufacturer impact resistance specs when fighting for full replacement approval.
Get a Free Quote →New Roof Installation
New construction means we get to do everything right from scratch. No compromises, no working around someone else's mistakes. Ice and water shield where it belongs, properly lapped underlayment, correct nailing patterns, and ventilation sized to the space. That's a roof that lasts.
Get a Free Quote →Metal Roofing
We install 24-gauge and 26-gauge steel standing seam panels in Galvalume and pre-painted finishes. Concealed fastener clips allow the panels to expand and contract with temperature changes without stress on the fasteners. That's why standing seam doesn't leak. The clips float.
Get a Free Quote →Shingle Roofing
We install every major shingle brand: GAF Timberline HDZ, Owens Corning Duration, CertainTeed Landmark, Atlas Pinnacle, Tamko Heritage, Malarkey Vista, and IKO Cambridge. Each brand has different warranty tiers, wind ratings, and price points. We help you compare without pushing one brand over another.
Get a Free Quote →Flat Roofing
TPO single-ply membrane in 60-mil or 80-mil thickness, fully adhered or mechanically attached over minimum R-25 polyiso insulation. Hot-air welded seams tested with a probe at every joint. We install per NRCA and manufacturer specifications with tapered ISO insulation creating minimum 1/4" per foot positive drainage. Ponding water is the number one cause of flat roof failure in Thornton. Tapered insulation eliminates it. FM 4473 rated systems available for hail-prone areas. Fully warranted by Carlisle, Firestone, or GAF.
Get a Free Quote →Commercial Roofing
Commercial roofing in Thornton means flat and low-slope systems: TPO, EPDM, PVC, modified bitumen, and built-up roofing. We install and repair all of them. Retail, warehouse, office, restaurant, multi-family. Our commercial crew handles buildings from 2,000 to 100,000 square feet.
Get a Free Quote →Gutter Installation
We hang gutters with hidden hangers screwed into the rafter tails or fascia board every 24 inches max. No spike-and-ferrule, no exposed hardware. Proper pitch is 1/4" per 10 feet toward each downspout. Too flat and water sits. Too steep and it looks wrong.
Get a Free Quote →Roof Inspection
After a storm, our inspection documents hail hits, wind damage, lifted shingles, and cracked components for your insurance claim. We take measurements, count damage per test square, and prepare a report your adjuster can use. Free for Thornton homeowners. We only charge if you hire us for the repair.
Get a Free Quote →Emergency Roof Repair
Emergency protocol for active water intrusion: (1) interior containment. Buckets, plastic sheeting, water extraction if accessible, (2) exterior tarping with 20x30 heavy-duty poly sheeting over damaged area extending minimum 4 feet past damage on all sides, (3) secure with 2x4 nailer boards lag-screwed to the roof deck (not through shingles), (4) secondary tarp overlap for multi-section damage, (5) document with timestamped photos for insurance. Permanent repair scheduled within 48-72 hours once materials are sourced.
Get a Free Quote →Skylight Installation
Tubular skylights work where standard skylights can't. Interior bathrooms, hallways, closets. A reflective tube runs through the attic from a small rooftop dome to a ceiling diffuser. Brings in surprisingly good natural light. We install them in 2-3 hours.
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