Hip roofs on any plan.
Not just rectangles. An L, a U, a plan with a wing — the hips, valleys and ridges are computed from the outline, so complicated roofs stop being a modelling exercise.
The geometry is solved, not drawn
Hip roofs on irregular plans come from a straight skeleton — the same construction a roofer reasons about. You give it the outline and the pitch; it returns the plates, with valleys where two wings meet and ridges where they do not.
Any eave edge can be switched from hip to gable with a click, with a live preview of what that does to the rest of the roof.
Eaves the way they are detailed
Plumb, square or level rafter cuts, each with a preview. Separate overhangs for the eave and the gable, applied to the plan before the plates are built, so the ridge extends properly rather than being stretched afterwards.
Composite shapes
Draw the pieces and combine them: merge two roofs into one object, trim one at another, or extend one to meet another and cut it to the surface. The click order is the same as for walls — first what changes, then the reference.
Penetrations and skylights
Chimneys and ducts cut vertically through every plate they cross, with reveals. Skylights lie in the plane of the slope, with a frame and glazing, and can be positioned from the floor below — because that is how the sill height arrives.
The rest of it.
Walls & openings
Draw a chain, and the corners mitre themselves and stay mitred. Windows and doors live in the wall as parameters, so nothing breaks when the wall moves.
Floors & stairs
The parts of a building that are tedious to model and easy to get subtly wrong. Draw the walking line and the treads, landings, soffit and the opening in the slab above follow.
Structure
IPE, HEA, HEB, UPE, angles and hollow sections from the catalogue — with joints cut to follow the profile, not sliced flat.
Services
Ten systems, product catalogues, bends and tees that appear where they belong, and connection ports that snap to the fixtures.
Documentation
Plans per storey, named sections, hatching by material at your drawing scale, schedules, and a LayOut file at the end of it. This is where the SketchUp ecosystem stops.
IFC
Material layers, openings linked to their fills, quantities computed from the geometry — and a check that stops two elements collapsing into one in the viewer.