Single Leaf vs Double Leaf Doors: Sizing & Cost Comparison

Clear-opening maths, hardware and cost differences, meeting stile and astragal details, and when a double leaf beats a single wide leaf.

Mortise vs Cylindrical Locks: Grades, Cost & Fire Rules

Mortise or cylindrical for project doors? Compare ANSI/BHMA grades, door prep, lifecycle cost and fire-door listing requirements.

Measure backset from door edge to bore center: 60 mm (2-3/8 in) vs 70 mm (2-3/4 in), EU 55/60 mm options, and mistakes that misalign hardware.

A rattling door is usually latch play, a worn strike or missing seals. Diagnose in 5 minutes and fix it without replacing the door.

Where hinges go on 2,040–2,400 mm doors: top, bottom and middle positions, when to add a third or fourth hinge, and fire-door exceptions.

Standard handle height is about 900–1,050 mm in most markets; ADA allows 34–48 in. Compare US, UK, EU, AU/NZ and China rules in one table.

Install a prehung door plumb and rattle-free: rough-opening checks, shimming sequence, fixing points and final gap and latch tolerances.

Hang a slab door square and gap-free: tools, hinge mortising, shimming and gap tolerances in mm and inches, plus fixes for binding doors.