20m Dome - Inflatable Dome

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20m Dome 

The 20m Inflatable Dome is one of the largest domes in the range, only beaten by the 24m Dome structure.  It has a massive floor space measuring nearly 250sqm and can hold nearly 480 people at maximum capacity.  The 20m Inflatable dome can be used both indoors and outside making it a great event space for festivals and concerts, conferences and exhibitions as well as seminars and dining events

The 20m inflatable dome is a large spherical structure with a huge 240 sq meters of usable internal floor area. This inflatable Structure is a great alternative to the classic marquee, tent or tipi design. The 20m dome can hold approximately 500 people or if set up in a restaurant configuration, can seat around 216 guests. Conference capacity, with stage, speakers and lighting, the dome can hold just over 260 people, seated. The unique and contemporary design can be lit with our coloured LED event lighting to create any colour scheme required.

For further details please download the full spec sheet below.

20m Dome Data Sheet (PDF)

For more information, or to organise a demo viewing of our 20m Inflatable Dome please call our enquiries team on 01487 640640 or email info@evolutiondome.co.uk


The 20m inflatable is constructed in strong PVC and rip -stop nylon. The structure will provide your event with shelter from the elements as well as a visually striking, contemporary focal point. The 20m dome is is fully waterproof, resistant to wind, rain, sand and dust. It comes in white with silver sealed Air Beams.  The sealed Air Beam technology design of Evolution Dome’s structures means that they can withstand gusts of wind up to 55mph.  In the event of a power failure, the sealed Air Beams will also prevent the structure from collapsing. The 20m inflatable dome is fully self supported meaning no poles or trussing taking up necessary space, or obstructing views. Due to the unique air structure design, it is insulated keeping the venue warm in colder climates and cool in heat.


The 20m inflatable dome can be installed in as little as 2 hours by a small team of 5 people.  For an event structure this large, this is a great time saving option compared to marquees and tents of similar proportions.  It is great for road shows and quick turn around events.


The versatility and unique design of the 20m inflatable dome means that it can be used for a whole host of different events.  This inflatable dome can be used both indoors and outdoors, on grass or hard standing.  Below are a few suggestions for using the 20m dome at your event.

  • Festival tent – the large capacity structure is a great alternative to traditional festival tent
  • Corporate events – conferences, exhibitions, conventions and trade show
  • Private functions – proms, balls, dinners and weddings
  • Concerts, theatre productions and restaurants


All of our inflatable structures are modular and can be joined seamlessly via a secure zipper system. This provides you with the option of creating a multi-room environment fit to host any kind of event. The 20m dome can be attached to other inflatable structures via the doorway or with the use of tunnels.

Bespoke Design & Branding

We offer a bespoke branding and design service.  The 20m inflatable dome can be created according to your specifications and ideas.  This includes full, bespoke colour printing directly onto the fabric of the inflatable structure.  It can be a design or branding and we can also make any additions or alterations that you would like to the structure itself.

For our hire air structures we have a vinyl Dacron printing service which creates designs according to your requirements.  This option is ideal for branding and company logos.  Another option is the replaceable cover which can be fully printed. This gives you the option of interchanging this with other covers, or removing completely to reveal the original inflatable structure beneath.

For further information and examples, please see our Bespoke & Branding page.

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