RIGA V Features: -First class insulation: R or K-value 3.0.-8 MM UV coated twin wall polycarbonate over main body and 10 MM twin wall polycarbonate in front & back walls for extra strength. Includes: -Includes 1 roof with opener & 1 rear wall window.-Includes 4 Roof Windows. Construction: -Extremely heavy duty construction. Assembly Instructions: -Assembly time: 2 people 1 full day (3 people makes it easier and reduces it to 6-8 hours, excluding any shelves) There are very few nuts & bolts. Dimensions: -Heavy duty Dutch barn door that is 30'' W x 72'' H with a key lock.-Overall dimensions: 90'' H x 116'' W x 210'' D 165 sq. ft. total. Warranty: -10 year warranty on the polycarbonate and a 15 year warranty on the frame..