Frequently Asked Questions

Internal steel doors from Steel Doors Online are slim-profile steel framed glass doors designed to divide spaces while maintaining openness and natural light flow.
They are an ideal alternative to solid walls or traditional timber doors, helping create bright, modern interiors while still separating rooms effectively.

They suit most indoor spaces, including:

• Living rooms, kitchens, home offices
• Hallways, staircases, bedrooms and en-suites
• Open-plan layouts and commercial interiors

Made-to-measure options include single and double hinged doors, fixed screens, sliding, pocket sliding, and doors with side panels/partitions.

Yes — steel framed glass allows daylight to pass between rooms, reducing dark areas while still creating separation.

Yes — choose clear, reeded, or frosted/opaque glass depending on the level of privacy you need.

Yes — sliding reduces swing clearance, and pocket doors slide into the wall cavity, making them ideal for compact layouts.

We can manufacture in any RAL colour (black is most common), plus white and bronze finishes. Hardware options include mortice latch handles, trim handles and pull handles (and pocket handles for pocket systems).

Steel allows much slimmer profiles than most aluminium systems while remaining exceptionally strong — creating a high-end architectural look with larger glass areas.

We supply systems including Jansen Janisol Arte 2.0, Jansen W50TB and Ottostumm profiles (W50TB/W75TB), with system selection based on performance and design requirements.

Yes — thermally broken steel profiles reduce heat transfer, and we pair them with modern insulating glazing. Triple glazing can be specified where required.

Standard spec is 24mm double glazing (toughened glass with an Argon cavity). Upgrades are available depending on the system and performance needs.

No — external systems use protected steel profiles and durable coatings designed for exterior environments. Routine cleaning and basic maintenance support long service life.

Fire rated steel doors are engineered to slow the spread of fire/heat (and in some cases smoke) to help form protected escape routes and compartments.

Depending on system selection, options include E30/FD30, E60 and higher ratings on selected systems.

Yes — specialist fire-resistant glazing is used to maintain integrity under high temperatures, while still allowing light and visibility.

Certified fire performance requires additional internal protection and tested construction methods, which can mean wider or reinforced profiles depending on the system.

Yes — the required rating depends on your building type and layout. Your architect/building control should confirm what’s required before ordering.

Certified fire doors must use approved components (locks, handles and closers) as part of the tested specification. Using non-certified hardware can invalidate performance.

Yes — every door is manufactured to your opening size and specification, so accurate measurements are essential before production begins.

Average manufacturing lead time is around 8 weeks, depending on specification (including bespoke colours and fire-rated systems).

Yes — delivery is available across the UK mainland, Scotland, Wales and Northern Ireland (remote locations confirmed at quotation).

Yes — we provide approval drawings so you can confirm sizes, layouts and specifications. Production begins only after approval.

All doors include a 10-year warranty covering frames, hardware and glass for long-term peace of mind.

No — because every door is bespoke, orders can’t be changed once manufacturing begins, and bespoke products are non-returnable.