Is the flat roof standard?

Yes — pitched and dual-pitch profiles are options on top of it.

Can you walk on the roof?

Only where a terrace is specifically formed and balustraded over a ground-floor module.

How does water drain?

The roof is built with falls to drainage points; the detail is confirmed with your specification.

Does a flat roof look like a container?

Cladding, fascia depth and glazing do most of the work here — the finished buildings read as contemporary rooms rather than containers.

Roofs

Flat Roof Modular Buildings

The flat roof is the standard profile. It keeps the building low, reads as contemporary rather than domestic, and is what makes roof terraces possible on stacked arrangements.

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Low, contemporary and stackable

A flat roof keeps the overall height down, which matters on sites with height restrictions or overlooking concerns. It is also the only profile that lets you form a usable terrace on the roof of a ground-floor module.

Lowest overall building height
Contemporary, commercial appearance
Required for roof terraces over ground-floor modules
Simplest option for stacked arrangements
Suits deep fascias and crisp cladding lines
Standard profile — no roof upgrade needed

Typical arrangements

1 module

approx. 13 m²

Single flat-roof room — office, kiosk or garden room.

4 modules

approx. 52 m²

Flat-roof building with a crisp continuous fascia line.

4 modules over 2 storeys

approx. 52 m²

Stacked, with a terrace over the exposed ground module.

Flat Roof Buildings — key facts

P300 unit: 2.9m × 2.2m externally; approximately 2.7m × 2.0m usable internally
P400 unit: 3.9m × 2.2m externally; approximately 3.7m × 2.0m usable internally
P600 unit: 5.9m × 2.2m externally; approximately 5.7m × 2.0m usable internally
Configuration: Mix P300, P400 and P600 units to create tailored footprints and shapes
Unit height: 2.40m external / 2.16m internal
Storeys: Up to two storeys, subject to final project design
Delivery: UK mainland and Northern Ireland — transport quoted separately

Adacon modular buildings use P300, P400 and P600 units with external lengths of 2.9m, 3.9m and 5.9m, a common 2.2m width and 2.40m external / 2.16m internal height. The sizes can be combined to create more tailored floor areas and building shapes, joined side by side or stacked to two storeys subject to the final project design.

What's available

Per-wall cladding style and colourFixed window and door configurations per wallInsulated walls, floor and roofInternal partitionsKitchen, WC and shower optionsTerrace, decking and balustrade

Flat Roof Buildings — photo gallery

Flat Roof Buildings — common questions

Buildings that commonly use this

Modular Offices

Modular office buildings from a single room to multi-module, two-storey layouts. Fitted out, insulated and delivered UK-wide. Configure yours online.

Security Cabins

Modular security cabins with all-round visibility, secure locking, heating and power. Built for construction sites, industrial premises and car parks.

Modular Shops

Modular retail units and pop-up shops with shopfront glazing, secure shutters, power and fit-out. Configure your retail unit online.

Related design options

Roof Terraces Pitched Roof Buildings Contemporary Black Buildings

All design options

Homes with this design

Two-Storey Modular Homes Modular Bungalows Garden Annexes & Granny Flats Modular Holiday Homes

All modular homes

Useful guides

How Much Do Modular Buildings Cost?

Practical guidance on module sizes, configuration, fit-out and the factors that shape a tailored modular-building quotation.

Do Modular Buildings Need Planning Permission?

Whether a modular building needs planning permission depends on its use, size, siting and duration. Read how the common cases usually work in the UK.

Do Modular Buildings Need Foundations?

Modular buildings need a level, load-bearing base rather than traditional deep foundations. Learn what base types suit garden rooms, site offices and two-storey builds.

All guides

Get a price for Flat Roof Buildings

Tell us what you need and we'll come back with pricing and lead times — usually within one working day.