Billy Arch Door | Primed MDF Internal Door | Hardware Concepts Billy Arch Door — Modern Arched Internal Door Introducing Billy, a refined take on our signature arch design, created to bring architectural detail into more accessible spaces. Blending clean modern lines with a soft curved arch, the Billy Arch Door adds depth and character to any interior — without the premium price tag. Designed for versatility, Billy offers the same striking visual impact as our premium arched door range while providing a lighter, cost-effective solution for full home projects. It's a popular choice for builders and homeowners who want a cohesive arch door design carried through every room, from hallways to bedrooms to living spaces. Crafted with a durable MDF skin and a foam-filled core, the Billy Arch Door strikes a practical middle ground — more soundproof than a standard hollow-core door, while remaining lighter than a solid-core door. It's easy to install, built for everyday living, and ideal for projects where consistent style matters across the whole home. Whether used throughout a project or paired with our premium feature doors, Billy delivers a balanced combination of style, function, and value. What's Included Door only (not pre-hung) Primed white, ready for final paint finish Technical Information Construction: MDF skin with foam-filled core Weight: Approx. 22–32kg (depending on size) Suitable for: Hinged or cavity slider applications Customisation: Compatible with a range of openings and hardware setups Available Sizes Height Width Thickness 2040mm 720mm 35mm 2040mm 770mm 35mm 2040mm 820mm 35mm 2040mm 920mm 35mm 2340mm 720mm 35mm 2340mm 770mm 35mm 2340mm 820mm 35mm 2340mm 870mm 35mm 2340mm 920mm 35mm Please note: No hardware is included with doors. Door Guarantee (PDF) Frequently Asked Questions Is the Billy Arch Door solid or hollow core? Neither — Billy uses a foam-filled core, which sits between hollow-core and solid-core doors. It's more soundproof than a hollow-core door while staying lighter than solid timber, making it easier to handle and install. Does the Billy Arch Door come pre-hung or pre-painted? No. Billy is supplied as a door only (not pre-hung) and comes primed white, ready for your final paint finish. What sizes is the Billy Arch Door available in? Billy is available in nine standard sizes, ranging from 2040 x 720mm up to 2340 x 920mm, all at 35mm thickness. See the full size chart above. Is hardware included with the Billy Arch Door? No, hardware is sold separately. Browse our designer door hardware range to complete the look.