Karthaus Roofing & Maintenance has been installing asphalt shingle roofs across Karthaus for 17 years. GAF Timberline HDZ, Owens Corning Duration, CertainTeed Landmark — we carry the top shingle lines and we're certified by the manufacturers to install them.
The difference between a 15-year roof and a 30-year roof isn't the shingle — it's the installation. Proper nail placement in the manufacturer's nailing zone, correct overlap between courses, ice-and-water shield at all vulnerable areas, and flashing that's sealed at every transition. Karthaus Roofing & Maintenance follows the exact specs that keep the manufacturer warranty valid.
Our Shingle Roofing Process
Consultation & Inspection
Our estimator examines your current roofline, checks the condition of the underlayment and flashing, and presents shingle options with honest pricing. GAF, Owens Corning, CertainTeed — you pick.
Tear-Off & Deck Prep
Old roof stripped to bare deck. We inspect the plywood or OSB sheathing for structural integrity, replace any compromised boards, and prep a clean, solid substrate for the new underlayment and shingles.
Underlayment & Flashing
Ice-and-water shield bonded at valleys and eave lines. Synthetic underlayment over the full deck. New aluminum drip edge at every eave and rake. All flashing — chimney, pipe, vent, wall — sealed and secured before a single shingle goes down.
Nailing & Overlap
Asphalt shingles laid from eave to ridge with precise offset between courses. Every shingle fastened in the manufacturer's nailing zone — too high or too low voids the warranty. Ridge cap and hip shingles complete the system with ridge vents for balanced attic ventilation.
What Karthaus Customers Say
"After getting several quotes, these guys stood out with their honesty and knowledge. No pressure, just straightforward advice and excellent workmanship."
"From the first phone call to the final walkthrough, everything was seamless. The team was courteous and efficient. Already recommended them to two friends."
"Our neighbors recommended them and now we understand why. Meticulous attention to detail and they treated our home like it was their own."
Why Choose Karthaus Roofing & Maintenance for Shingle Roofing?
Full Tear-Off Standard
We strip to the deck on every shingle job. No overlay shortcuts. Your underlayment, ice-and-water shield, and flashing are installed on a clean, inspected roof deck.
30+ Color Options
Architectural shingles in weathered wood, charcoal, onyx black, estate gray, desert tan, and 25+ more. We bring samples to your Karthaus home so you can match your siding and trim.
Ice-and-Water Shield Standard
Every shingle roof includes ice-and-water shield at valleys, eaves, and around penetrations. This self-adhering membrane is the last line of defense against water intrusion if a shingle fails.
Proper Flashing at Every Penetration
Chimney flashing, step flashing, pipe boots, vent boots, valley channels — every transition sealed with waterproof sealant and proper overlap. Flashing failures cause 90% of roof leaks.