Roof lantern commercial building cost: daylight at scale

Roof lantern commercial building cost: one large or several smaller

For roof lantern commercial building cost, the first choice is how you distribute the daylight. One large roof lantern gives a strong accent of light, for example above a showroom or reception. Several smaller roof lanterns spread the light more evenly across a hall, open-plan office or practice room. Each roof lantern has its own upstand and connection, so the number of openings counts in the contractor's work.

Large sizes are quite possible. A mono-pitch goes up to 5 metres in one panel and wider with thermally broken bars. A gable roof lantern goes up to 6 metres long and 4 metres wide per roof surface as standard, larger in modules. A hipped roof lantern we make up to 9 m² of glass in one piece, and larger with segmentation and concealed bars.

• Mono-pitch up to 5 m in one panel, wider with bars
• Gable up to 6 m long, larger in modules
• Hipped up to 9 m² of glass, larger with segments

Extras that often come up in a commercial building

In a workspace or practice you want a comfortable indoor climate, also under a large hipped roof lantern. Solar control glass helps against overheating in rooms where people work all day. Sound-insulating glass is an option for a building on a busy road.

Safety counts too. In a roof we use safety glass to NEN standard. Read more in safety glass and laminated glass.

• Safety glass to NEN standard
• Solar control or sound-insulating glass
• Frame in the RAL colour of your house style

The work on the roof

A commercial roof is often large and high. Lifting large roof lanterns usually needs a crane or aerial platform, and fall protection is required on a flat roof during the work. Those are contractor costs, often charged per day or per deployment. Also read transporting and lifting a roof lantern.

For an existing building a structural engineer assesses whether the roof can carry the openings and the extra weight. A steel deck or a concrete roof needs a different approach from timber joists. Take that into account beforehand, so it does not come back as extra work.

Trade prices and planning

Contractors get trade prices from the first project, with no threshold or minimum. With more than three projects per calendar year a partner discount is added, applied directly in every quote. For larger volumes we make additional arrangements. The lead time is from 2 weeks, up to 8 weeks for complex made-to-measure projects. For urgent build schedules a rush option is sometimes possible. See roof lanterns for contractors and a roof lantern for a commercial building.

Frequently asked questions