Duecks Mechanical Inc. markets its structures under the label Diamond Shelters. Although all business is conducted out of the Whitemouth office, Duecks Mechanical Inc. operates in the United States as Giant Supply USA. Diamond Shelters has a growing network of excellent dealers in Canada and the United States to service our many customers. This service includes helping you choose the shelter best suited for you. We have the building that will fit your needs. If not, we may be able to customize our shelters to fit the dimensions or specifications you require. Easy to follow set up instructions are included with each shelter package. Our technical support staff is available to answer any questions that may arise while erecting the shelters. This after sales service provided by Diamond Shelters and our dealers ensures that all structures are completed to your satisfaction.