Committed, quality workmanship and excellent customer service No matter if it’s roofing work, gutter work, or solar panel work that you’re in the market for, you can rest assured you made the right choice with Western Sierra. It is our passion to improve the look and the functionality of your home. And we always treat our customers’ homes with respect. We offer free estimates and a 50-year warranty on all our roofing systems. Our business is fully licensed, bonded, and insured. Whether your located in Walnut Creek, Danville, Oakland, Pleasant Hill, Lafayette, San Ramon, Orinda, Moraga, Berkeley, Brentwood, Discovery Bay, Pittsburgh, Antioch and Bay Point, Fairfield, Vacaville, Benicia we'll come out for a FREE ESTIMATE. All you need to do is pick up the phone and make the call to get started and learn more about our services.