Roof Style Drafting – Revit/AutoCAD?

Roof Style Drafting – Revit/AutoCAD?

They have the strangest names – gable, hip, jerkinheads, clerestory, saw-tooth, witch’s hats, karahafu, mansard, rainbow, butterfly, satari and numerous far more. No, they are not a list of insect species. They are the names of various types of roofs. While the numerous designs need to be handled meticulously for their complexity, even drafting the regular roof is ordinarily acknowledged as just one of the extra challenging capabilities to grasp in architectural style drafting. Equally Revit and AutoCAD are well outfitted to empower the delivery of these types roofs in residential style drawings, but for many, AutoCAD is edging just a very little bit forward.

Appropriate from Stone Age moments, getting a roof in excess of our heads, or shelter, has been just one of life’s biggest priorities and a recognised human correct. The models have arrive a long way from the rudimentary styles of yore. So, how does it get the job done and what are the fundamental patterns?

Roofs can be drafted on their personal or they can be produced as a end result of placing them on a area that has been enclosed by a polyline or a set of partitions. When described, the proportions, slope, faces or edges can be modified. For far more intricate styles, an ‘object’ is chosen and modified until it is pretty much complete. For better versatility on customising edges and other characteristics, the roof can be transformed to slabs, to which quite a few details can be added or improved, these types of as orientation, angle, fascia and soffit profiles. These style and design details can be additional globally.

Other than the a lot more intricate ones with the extravagant names, simple sorts incorporate gable, hip, lose or flat. Low-cost and easy to assemble, the sloped gable is the most common form around the world. Because of their slope, rain and snow are not retained and leakage is prevented, introducing to its toughness. The ‘hip’ has slopes on four sides, aiding it anchor the household beneath it. They are a lot less influenced by potent winds and can be additional to a new property or to an existing household. A ‘shed’ functions only a person sloping airplane, which can have skylights or photo voltaic panels, increasing the potential for power performance. ‘Flats’ are pretty much wholly horizontal with a slight slope for drainage, favourable for photo voltaic panels and value effective. There are also mixtures of gable, hip and other combos.

So, how do AutoCAD and Revit fare in the approach of roof structure drafting?


AutoCAD software package gives a variety of alternatives for creating and modifying a huge range of designs. In AutoCAD, plans need to be cross-checked with elevations and ridges.

Commands in AutoCAD to produce diverse layouts are versatile. They can be transformed separately with changes in height, slope, edges and the addition of dormer windows. A uncomplicated outline can be drawn as a polyline of a team of partitions, which can be converted into a roof, so that the draftsman can focus on the outline very first and modifications later on.

Flat and sloped ones can be created with the very same system, with a lower increase selection and an overhang of ” established for the flat. Factors on the inside of exterior walls are picked so that the tops of the partitions type parapets.

The ‘Properties’ palette can modify thickness, pitch and overhang.

AutoCAD’s ‘grips’ permit enhancing in these types of a way that 2D objects, this sort of as traces, polylines and arcs, can be stretched, moved, rotated, scaled, copied or mirrored. Grips can also adjust the edges and vertices, ridge details, take care of missed intersections, transform the angle, rise or operate of slabs and can assist develop gables.

Materials can be defined. They can be shown in wireframes and doing work shade views.

Attributes of roof design drafting in AutoCAD contain:

  • Instrument Houses for an present 1
  • Transforming proportions
  • Transforming edges and faces
  • Converting slabs
  • Picking product
  • Deciding upon display screen qualities
  • Picking out hatching
  • Altering place
  • Attaching hyperlinks, notes or files


Coming up with a roof in Revit is considerably distinct from executing so in AutoCAD. Revit is deemed much better for huge-scale projects and has quite a few options. Nevertheless the device for elevation sights and designs are helpful, drafting sections and other aspects can be challenging, particularly for standard houses with sloped, canted, curved, cranked and custom-created models. When developing complex roofs in Revit, it may be preferable to make them as individual units and then be a part of it to the other part with the ‘join roof’ tool.

Generally, it may possibly not attractiveness aesthetically, and the edges might not meet exactly where they are expected to. This tends to take place for the reason that Revit attempts to establish slopes from the edges. The edges might not fulfill beautifully, and there are a couple approaches to counter this situation. A single way is to make a mass, decide on mass faces and generate a roof. This could be intricate and lengthy, as a slope arrow should be utilized to change slope angle and slope path.

A further selection includes shape enhancing equipment. Once the traces are drawn, the default 3D look at can allow the adjustment of the condition, the top and motion, but this way, it cannot be joined to yet another roof.

In Revit, a roof can be produced from: a building footprint, as an extrusion, with sloped glazing or from a mass occasion, but it can’t slice as a result of doorways or windows, even though trusses can be connected in the layout.

Creating by footprint involves:

  • 2D shut-loop sketches of the perimeter
  • Selection of walls or draw traces from the system watch
  • Shut loops for openings
  • Slope parameters for sketch traces

Developing by extrusion will involve:

  • An open up-loop sketch of the profile
  • Applying strains and arcs to sketch the profile in an elevation perspective
  • Modifying the perform plane

Problems with roof design and style drafting in Revit

  • When generating a hip with rafter construction (for a vaulted ceiling), Revit does not automatically allow for for a ridge article or other supporting aspect to aid the hip intersection.
  • Personal elements of a style are positioned on the very same approach.
  • It is a lot more hard to edit.
  • With modifications in reference amounts (eg. elevations), other proportions have to be modified also.

Comparing the roof design drafting capabilities of both AutoCAD and Revit, customers really feel that AutoCAD is simpler to use simply because it:

  • Makes and modifies outlines with additional manage
  • Can make it less complicated to increase particulars and alternatives
  • Makes editing much easier
  • Can make drafting and documenting less difficult

Even so, Revit modelling allows considerably less architecturally or technically qualified draftsmen to develop extra sophisticated types, while in AutoCAD, the precision and precision wholly relies upon on the capacity of the draftsman to the right way interpret the style.

In the long run, although Revit and AutoCAD computer software have extensive resources for roof design, it is the all round person-pleasant solution of AutoCAD that residential drafting solutions professionals have observed to be slightly much more preferable.

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