Roof Style Drafting – Revit/AutoCAD?

They have the strangest names – gable, hip, jerkinheads, clerestory, noticed-tooth, witch’s hats, karahafu, mansard, rainbow, butterfly, satari and numerous extra. No, they’re not a listing of insect species. They are the names of diverse models of roofs. Nevertheless the various layouts need to be taken care of carefully for their complexity, even drafting the standard roof is normally acknowledged as one particular of the extra hard capabilities to grasp in architectural style and design drafting. Both of those Revit and AutoCAD are very well equipped to empower the shipping and delivery of these styles roofs in household style drawings, but for numerous, AutoCAD is edging just a small little bit ahead.

Appropriate from Stone Age situations, possessing a roof over our heads, or shelter, has been just one of life’s greatest priorities and a recognised human correct. The styles have appear a prolonged way from the rudimentary designs of yore. So, how does it operate and what are the primary styles?

Roofs can be drafted on their possess or they can be produced as a consequence of positioning them on a space that has been enclosed by a polyline or a set of walls. When outlined, the proportions, slope, faces or edges can be modified. For far more elaborate layouts, an ‘object’ is chosen and modified till it is pretty much complete. For higher overall flexibility on customising edges and other features, the roof can be converted to slabs, to which numerous details can be additional or improved, this sort of as orientation, angle, fascia and soffit profiles. These design particulars can be included globally.

Other than the extra complicated types with the extravagant names, fundamental types contain gable, hip, drop or flat. Reasonably priced and quick to build, the sloped gable is the most typical form worldwide. Due to the fact of their slope, rain and snow are not retained and leakage is prevented, adding to its toughness. The ‘hip’ has slopes on 4 sides, encouraging it anchor the dwelling beneath it. They are a lot less afflicted by solid winds and can be additional to a new household or to an current dwelling. A ‘shed’ features only one particular sloping plane, which can have skylights or solar panels, rising the potential for electrical power performance. ‘Flats’ are almost fully horizontal with a slight slope for drainage, favourable for photo voltaic panels and price tag productive. There are also mixtures of gable, hip and other mixtures.

So, how do AutoCAD and Revit fare in the procedure of roof style drafting?


AutoCAD software features a assortment of alternatives for making and modifying a extensive selection of kinds. In AutoCAD, strategies should be cross-checked with elevations and ridges.

Instructions in AutoCAD to develop various layouts are multipurpose. They can be altered individually with modifications in peak, slope, edges and the addition of dormer home windows. A easy define can be drawn as a polyline of a team of walls, which can be transformed into a roof, so that the draftsman can concentrate on the outline very first and modifications later on.

Flat and sloped kinds can be developed with the similar process, with a very low rise number and an overhang of ” established for the flat. Points on the inside of exterior partitions are picked so that the tops of the partitions type parapets.

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

AutoCAD’s ‘grips’ empower modifying in these a way that 2D objects, this sort of as strains, polylines and arcs, can be stretched, moved, rotated, scaled, copied or mirrored. Grips can also transform the edges and vertices, ridge factors, repair skipped intersections, improve the angle, increase or operate of slabs and can support produce gables.

Components can be described. They can be displayed in wireframes and doing the job shade sights.

Functions of roof style drafting in AutoCAD involve:

  • Device Houses for an present a person
  • Transforming proportions
  • Changing edges and faces
  • Changing slabs
  • Selecting product
  • Picking display screen houses
  • Choosing hatching
  • Altering area
  • Attaching hyperlinks, notes or files


Coming up with a roof in Revit is noticeably different from executing so in AutoCAD. Revit is considered improved for substantial-scale tasks and has numerous choices. While the resource for elevation views and ideas are powerful, drafting sections and other aspects can be demanding, specifically for classic houses with sloped, canted, curved, cranked and personalized-manufactured models. When making intricate roofs in Revit, it may perhaps be preferable to generate them as individual models and then be a part of it to the other section with the ‘join roof’ instrument.

Commonly, it could not attractiveness aesthetically, and the edges could not meet up with wherever they are anticipated to. This tends to transpire since Revit attempts to develop slopes from the edges. The edges may well not fulfill perfectly, and there are a couple of strategies to counter this concern. One way is to make a mass, pick mass faces and build a roof. This could be challenging and lengthy, as a slope arrow should be employed to change slope angle and slope route.

Yet another choice involves shape editing equipment. After the strains are drawn, the default 3D watch can help the adjustment of the form, the peak and movement, but this way, it can not be joined to another roof.

In Revit, a roof can be made from: a developing footprint, as an extrusion, with sloped glazing or from a mass instance, but it cannot cut as a result of doorways or windows, while trusses can be hooked up in the style.

Building by footprint involves:

  • 2D shut-loop sketches of the perimeter
  • Variety of partitions or draw strains from the system view
  • Shut loops for openings
  • Slope parameters for sketch strains

Generating by extrusion will involve:

  • An open up-loop sketch of the profile
  • Making use of traces and arcs to sketch the profile in an elevation view
  • Enhancing the work plane

Troubles with roof style drafting in Revit

  • When producing a hip with rafter design (for a vaulted ceiling), Revit does not automatically allow for a ridge publish or other supporting aspect to support the hip intersection.
  • Specific features of a style and design are placed on the similar strategy.
  • It is extra difficult to edit.
  • With variations in reference amounts (eg. elevations), other dimensions need to be modified also.

Evaluating the roof style drafting abilities of both of those AutoCAD and Revit, consumers really feel that AutoCAD is a lot easier to use since it:

  • Produces and modifies outlines with extra management
  • Tends to make it easier to add aspects and options
  • Helps make modifying easier
  • Will make drafting and documenting a lot easier

Having said that, Revit modelling permits much less architecturally or technically expert draftsmen to deliver extra elaborate patterns, while in AutoCAD, the precision and accuracy wholly is dependent on the capability of the draftsman to effectively interpret the structure.

Finally, even though Revit and AutoCAD software package have considerable resources for roof structure, it is the total consumer-welcoming solution of AutoCAD that residential drafting expert services professionals have uncovered to be a little bit more preferable.