Roof Design Drafting – Revit/AutoCAD?

They have the strangest names – gable, hip, jerkinheads, clerestory, saw-tooth, witch’s hats, karahafu, mansard, rainbow, butterfly, satari and numerous much more. No, they’re not a record of insect species. They are the names of diverse types of roofs. Although the assorted designs need to have to be taken care of cautiously for their complexity, even drafting the regular roof is usually acknowledged as a single of the far more hard skills to learn in architectural design and style drafting. Both equally Revit and AutoCAD are nicely equipped to empower the supply of these models roofs in residential design and style drawings, but for numerous, AutoCAD is edging just a minimal bit ahead.

Ideal from Stone Age occasions, acquiring a roof in excess of our heads, or shelter, has been one of life’s best priorities and a recognised human appropriate. The patterns have occur a long way from the rudimentary layouts of yore. So, how does it work and what are the primary designs?

Roofs can be drafted on their personal or they can be designed as a consequence of inserting them on a house that has been enclosed by a polyline or a established of partitions. The moment defined, the proportions, slope, faces or edges can be modified. For more intricate designs, an ‘object’ is chosen and modified until it is just about finish. For higher overall flexibility on customising edges and other functions, the roof can be transformed to slabs, to which quite a few facts can be additional or improved, this kind of as orientation, angle, fascia and soffit profiles. These layout aspects can be additional globally.

Other than the far more complex types with the fancy names, basic sorts include gable, hip, shed or flat. Low-cost and easy to construct, the sloped gable is the most frequent kind globally. Because of their slope, rain and snow are not retained and leakage is prevented, adding to its durability. The ‘hip’ has slopes on 4 sides, helping it anchor the property beneath it. They are significantly less afflicted by robust winds and can be included to a new house or to an present property. A ‘shed’ features only one sloping airplane, which can have skylights or photo voltaic panels, expanding the prospective for electricity efficiency. ‘Flats’ are just about totally horizontal with a slight slope for drainage, favourable for solar panels and expense productive. There are also mixtures of gable, hip and other mixtures.

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


AutoCAD program presents a assortment of solutions for generating and modifying a huge assortment of models. In AutoCAD, strategies should be cross-checked with elevations and ridges.

Instructions in AutoCAD to generate distinctive patterns are versatile. They can be transformed independently with variations in height, slope, edges and the addition of dormer home windows. A very simple define can be drawn as a polyline of a group of partitions, which can be converted into a roof, so that the draftsman can concentrate on the outline to start with and modifications afterwards.

Flat and sloped ones can be created with the exact same system, with a small increase quantity and an overhang of ” set for the flat. Details on the within of exterior walls are chosen so that the tops of the partitions form parapets.

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

AutoCAD’s ‘grips’ allow enhancing in this sort of a way that 2D objects, these as lines, polylines and arcs, can be stretched, moved, rotated, scaled, copied or mirrored. Grips can also change the edges and vertices, ridge points, correct skipped intersections, improve the angle, rise or run of slabs and can enable create gables.

Materials can be described. They can be exhibited in wireframes and doing the job shade sights.

Options of roof design and style drafting in AutoCAD incorporate:

  • Software Properties for an current one
  • Shifting proportions
  • Modifying edges and faces
  • Changing slabs
  • Picking out material
  • Choosing exhibit qualities
  • Deciding upon hatching
  • Modifying site
  • Attaching hyperlinks, notes or documents


Developing a roof in Revit is considerably various from performing so in AutoCAD. Revit is deemed better for massive-scale tasks and has quite a few selections. While the device for elevation sights and ideas are effective, drafting sections and other specifics can be complicated, in particular for common residences with sloped, canted, curved, cranked and tailor made-designed models. When building complicated roofs in Revit, it could be preferable to build them as independent models and then join it to the other segment with the ‘join roof’ instrument.

Commonly, it may not enchantment aesthetically, and the edges may not meet in which they are predicted to. This tends to occur because Revit tries to establish slopes from the edges. The edges could not satisfy perfectly, and there are a handful of ways to counter this issue. 1 way is to create a mass, decide on mass faces and generate a roof. This could be sophisticated and prolonged, as a slope arrow ought to be made use of to alter slope angle and slope direction.

A further alternative requires condition enhancing applications. The moment the strains are drawn, the default 3D look at can help the adjustment of the condition, the top and motion, but this way, it can’t be joined to a different roof.

In Revit, a roof can be produced from: a constructing footprint, as an extrusion, with sloped glazing or from a mass instance, but it simply cannot minimize by means of doors or home windows, while trusses can be attached in the style and design.

Developing by footprint consists of:

  • 2D shut-loop sketches of the perimeter
  • Choice of walls or attract traces from the prepare check out
  • Closed loops for openings
  • Slope parameters for sketch lines

Making by extrusion entails:

  • An open-loop sketch of the profile
  • Employing strains and arcs to sketch the profile in an elevation see
  • Enhancing the function plane

Problems with roof layout drafting in Revit

  • When making a hip with rafter development (for a vaulted ceiling), Revit does not automatically allow for for a ridge article or other supporting ingredient to aid the hip intersection.
  • Individual factors of a style and design are placed on the exact same program.
  • It is additional difficult to edit.
  • With modifications in reference degrees (eg. elevations), other dimensions ought to be modified also.

Evaluating the roof style drafting qualities of both equally AutoCAD and Revit, customers sense that AutoCAD is less difficult to use because it:

  • Results in and modifies outlines with a lot more command
  • Makes it easier to include aspects and options
  • Makes editing a lot easier
  • Tends to make drafting and documenting simpler

However, Revit modelling allows significantly less architecturally or technically qualified draftsmen to deliver a lot more sophisticated patterns, whereas in AutoCAD, the precision and precision wholly depends on the capability of the draftsman to properly interpret the style.

In the long run, even though Revit and AutoCAD software program have extensive applications for roof structure, it is the all round consumer-pleasant method of AutoCAD that residential drafting services experts have uncovered to be somewhat a lot more preferable.