Straight String Staircases

A straight string staircase is a clean, modern staircase style where the side string runs in one continuous line along the flight. This gives the stairs a crisp profile and a simple architectural finish.

This style suits many homes because it can feel modern without becoming too bold. A straight string staircase works well in new-build properties, home renovations and larger refurbishment projects where the staircase needs to look refined and practical.

Every straight string staircase should be designed around the property, the structure and the way the stairs will be used each day. With the right planning, closed string staircases can deliver a smart finish, strong performance and a style that works with both classic and modern interiors.

Straight String Staircase Design

A straight string staircase design starts with the layout. The floor-to-floor height, stair opening, headroom, pitch, landing positions and fixing points all affect the final staircase.

A straight string staircase has a clear side profile, so the proportions need careful thought. The string depth, tread thickness, balustrade style and handrail detail should all work together.

Common design options include:

• Timber treads in oak, walnut or other hardwood finishes
• Painted or powder-coated steelwork
• Closed risers for a more solid appearance
• Open risers where the layout allows
• Glass balustrades for a lighter modern finish
• Metal spindles or railings for a stronger design line
• Timber or metal handrails
• LED lighting where the stair build-up allows
• Any RAL colour for powder-coated steel details

A well-planned straight string staircase design should feel balanced in the room. It should suit the interior scheme, meet practical needs and give the home a clear focal point without adding unnecessary complexity.

Our Design and Planning Process

Initial Review

Each straight string staircase project starts with a practical design and technical review. This stage helps confirm whether the staircase layout, structure and finish direction are suitable before manufacturing begins.

We review the measurements, floor levels, opening size, wall positions and fixing zones. We also look at how the staircase connects with surrounding floors, landings, walls and balustrades.

Typical considerations include:

• Staircase size and position
• Floor-to-floor height
• Tread and riser specification
• String depth and profile
• Balustrade layout and fixing method
• Glass thickness and handrail options
• Steel finish and colour

This early review helps keep the project clear. It also allows key decisions to be made before the fabrication package is issued.

3D Design Development

After the initial review, we develop the staircase design through drawings and visual models. This helps show the size, shape and finish of the staircase before manufacturing starts.

3D design can help you compare different options. You may want a straight string staircase with glass balustrades for a lighter look, or a more solid closed string staircase with timber treads and a darker steel finish.

This stage also helps coordinate the staircase with other parts of the home. Flooring, skirting, wall finishes, glazing and lighting all need to work with the staircase detail.

Clear design development reduces the chance of changes once production has started. It also gives homeowners, builders and designers a shared view of the final result.

Straight String Staircase Manufacture

Each straight string staircase is manufactured according to approved project drawings. This gives control over the dimensions, tread details, string profile, balustrade interfaces and finish quality.

The manufacturing process depends on the agreed design. Some closed string staircases use timber construction, while others include steel support with timber, glass or metal finishing details. The final specification will depend on the layout, budget and design intent.

During manufacture, we check the key details so the staircase is ready for the site. This includes reviewing measurements, fixing points, finish quality and any items that need to be coordinated with the installation team.

A carefully manufactured straight string staircase should arrive on site ready for a smooth installation, with a clear link between the approved drawings and the finished product.

Why Choose a Straight String Staircase?

A straight string staircase is a dependable choice when you want a modern finish with a clean, simple shape. It gives the home a crisp side profile, strong structure and flexible design options.

This style works well in modern homes and renovations. Timber, glass and steel can all be used to shape the final look, while open or closed riser layouts can be reviewed to suit the space. Steelwork can also be powder coated in a wide choice of RAL colours.

Closed string staircases are ideal when you want the staircase to feel neat and complete from the side, especially in hallways or open-plan spaces.

For homeowners planning a bespoke staircase, this style offers a strong balance of design, function and cost control.

Straight String Staircases Compared to Other Stair Types

A straight string staircase is part of the side-string staircase family. Its main feature is the continuous string line that runs along the side of the flight.

Other alternatives include:

• Zig-zag staircases, which create a stronger geometric feature
• Cut string staircases, which show more tread detail from the side
• Centre spine staircases, where the treads are supported from a central beam
• Cantilever staircases, where treads appear to float from the wall

Staircase style selector

Contact us

Call us on 01760 788 491
Email hello@ukstairs.co.uk