There are a lot of good reasons why David Beitz Construction has completed more than 10,000 installations in the greater SD & G-Cornwall area since 1989. Start with our fully trained and insured roofing professionals. There is nobody better, which is why we offer a 10-year workmanship warranty. Ask about our Roof Repair Service – it could add years of life to your roof. From renovating your home to repairing damage to your business, David Beitz Construction always offers free estimates with a detailed description of the work to be done. Book an appointment at your site in the Greater Seaway Region. We prepare estimates for all clients.