Join GRS & Lomanco for product training and new product updates at GRS in Sioux City! Traning will be conduted by the manufacturer's representative between 8:00 AM and 10:00PM. Arrive early for a free hot breakfast!

Training Seminar

ROOF RESTORATION
ROOF COATINGS
ROOF REPAIR

Customer Appreciation
Chili Cookoff

The GRS staff are bringing their best top-secret chili recipes!
Bring your appetite and you be the judge!

In addition to a large stock of roofing materials, Gannon's now carries exterior products below the roofline, including vinyl siding from Certainteed, engineered stone from Heritage Stone, windows from Alliance and MI, and doors from Masonite, Waudina Millwork, and Therma-tru.

Heritage Stone

Contact your sales representative now for a full list of exterior products from Gannon Roofing Supply!

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