The planning notebook.

Useful measurements, explained formulas and small details that make a plan easier to trust.

A practical measuring sequence for wall width, clearances and obstacles before you plan decorative moulding.

Understand outside frame size, clear gaps and moulding face width with a worked three-panel example.

Turn frame dimensions into pieces and stock lengths, while keeping kerf, end trim and spare material separate.

Calculate equal bays with a batten at both ends, and understand the difference between clear and centre spacing.

Calculate the footprint of a regular gallery grid and centre the whole group on a wall.

Translate a frame’s top edge into a single centred hanger position without mixing reference points.

Keep a single unit system, convert dimensions correctly and avoid cumulative rounding errors.

A practical final check of dimensions, material quantities and assumptions before you order decorative trim or frames.