Manual Edit Checks
A disciplined technical playbook for reviewing custom roof alterations, guaranteeing coplanar alignment, watertight valley transitions, and precise fascia datum heights.
Manual Plane Locking Rule
Whenever automated roof planes are manually unlinked or unlocked in 3D modeling environments, automatic fascia heights and auto-miter valleys cease recalculating. Every coordinate displacement requires explicit geometric validation.
Geometry Verification Standard
Manual modifications introduce subtle non-coplanar faults, mismatched rafter tails, and unsealed valley junctures. Use these systematic protocol layers to verify structural feasibility before model finalization.
Ridge Elevation Parity
Confirm opposing slopes sharing a common ridge line maintain equal baseline coordinates to prevent phantom gables.
Plane Edge Co-Planarity
Check that abutting roof polyline nodes snap directly without sub-millimeter gaps or polygon overlaps.
Fascia Continuity Verification
Ensure that manual slope changes have not offset fascia lines vertically across adjacent walls. Gutter hanging and architectural trim require consistent fascia sub-fascia datum heights.
Intersecting Polyline Nodes
Zoom into polyline intersections at 800% in plan view. Manual dragging frequently introduces micro-vertex offsets that prevent automatic roof framing members from generating correctly.
Dual-Pitch Junction Parity
When adjoining planes feature distinct slopes (such as 8:12 meeting 4:12), the valley centerline migrates laterally. Verify that the valley trough aligns directly with support rafter bearing lines.
Blind Valley & Crickets
Manual dormer integration often leaves dead water pockets behind gables. Confirm that secondary saddle planes maintain a minimum 3:12 fall outward to eliminate debris and ponding risks.
Upper Story Wall Step-Backs
Review cross-sections where manually edited slopes terminate against vertical sidewalls. Step flashing clearances must account for insulation packaging and exterior sheathing thicknesses.
Overhang Clearance & Return Box
Verify that rake overhang returns do not collide with adjacent window headers or masonry reveals. Manual modifications can compress gable fascia projections against trim boards.