In addition, a mansard roof is a four-sided structure, not a two-sided one. A gambler roof is always sharp with long points at the main beam, whereas a mansard is on a low pitch. Both sides of the roof where the ridge is in contact with each other. Gambrel consists of two symmetrical roof sides with slopes in opposite directions. Gambrel Versus Mansard: What is the Difference? The original gambrels provided more habitable space on the third story of the building, hence their popularity, while the modern versions are preferred for their visual interest. Some people see this roof design as a modest roof shape, but there is no denying its long survival through several hundreds of years. In fact, you can find this type of roof in many different building styles across the world, not just Dutch Colonial and Georgian. But the gambrel design was soon inspired by Europeans who adopted it for their Georgian homes. The style was seen in Maine, Georgia, and more commonly in Coastal regions of the US. This roof design was a standard structure in Dutch Colonial homes. While the exact origins of gambrel roof designs in the US are still unknown, it is believed that a gambrel roof was first built in 1677, in the form of Harvard University. This is due to the structure of a gambrel, which allows a wider span. Adding dormers will provide additional habitable attic space for your home. Barn roofs are the most common examples of gambrel roof designs. This type of roof was made popular in the 18th century in North America and was mainly seen in Dutch Colonial homes. The upper slope is located at a shallow angle and the lower slope is steeper. What is a Gambrel Roof?Ī gambrel roof is a symmetrical structure with two-sided slopes on each side. In this article, we will explain everything you need to know about a gambrel roof, its history, pros and cons, and how to build one for your home. They are also seen in mansions and Dutch Colonial style houses. With its nostalgic look and additional floor space, a gambrel roof is increasingly gaining renewed interest among homeowners who are seeking a large and functional attic space.Ĭontrary to popular belief, gambrel roofs aren’t just used for barns, sheds, and garages. Some types of roofs will even make a huge impact on the property value, so whether you’re looking for a new roof design or you wish to update your existing roof, it’s important to choose an attractive and unique structure. Roof peak happens to be 44 feet above grade! Living at 20 feet above ground does afford some spectacular views – we look due south down Lake Traverse and can see the tops of tall structures in Browns Valley, our closest town six miles away.Your roof’s structure can be a unique architectural feature that stands out from other homes. We also ended up with a very, very tall building. Our steep slope is 24/12 and our upper slope is 6/12/ On the inside, our slope is 12/12 and our flat ceiling ends up at 16 feet above floor! We utilized the “Golden Ratio” ( ) to create slopes and pitch break points. Our trusses were so much larger, they had to be fabricated in two halves, split right down the center and field spliced to create a whole unit. This got us across from column to column to support a floor, now we needed a roof system! We utilized trusses much like these, only much bigger: Ends of these trusses are supported by LVL ( ) beams notched into four ply 2×8 glu-laminated columns every 12 feet. With our 16 foot high finished ceiling downstairs (it is a half-court basketball court), this made our second floor level 20 feet above grade. These parallel chord trusses are close to four feet in depth. We clearspanned this using 48 foot long prefabricated wood floor trusses, placed 24 inches on center. We wanted just a lot more living space than what could be afforded by a bonus room in a gambrel truss.Ĭenter width of our home is 48 feet. It is actually probably more appropriately a shouse (shop/house). My bride and I happen to live in a gambrel style barndominium (for more reading on barndominiums ). Usually you can expect a room from 1/3 to ½ building width with smaller span trusses (generally 24-30 foot spans). Largest downside to this type of truss system is lack of bonus room width. Most often gambrel roofs are supported by one piece clearspan gambrel trusses. Hansen Pole Buildings’ Designer Rachel and I recently had some discussions in regards to maximizing post frame gambrel truss useable space. Maximizing Post Frame Gambrel Usable Space With Trusses
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