From the outside, an air dome looks almost too simple to work — a smooth, rounded fabric structure standing on its own, with no visible frame holding it up. There's no steel skeleton, no trusses, no columns. Just fabric and air. And yet these structures cover sports facilities, industrial storage, and increasingly, biogas installations, all over the world.

This guide covers the essentials of single skin air domes specifically: how they're built, how they hold their shape, where they're used, and what to know if you're evaluating one for a project.

What Is a Single Skin Air Dome?

A single skin air dome is an air-supported structure made from a single layer of coated fabric, held in its dome shape entirely by internal air pressure. Unlike a double-membrane (or double-skin) air dome, which uses two layers of fabric with insulating air trapped between them, a single skin dome relies on one continuous fabric envelope, pressurised just enough above the outside air pressure to keep the structure rigid and standing.

This is sometimes also called a single membrane air dome — same structure, same principle, just a slightly different way of describing the single-layer construction.

The idea is straightforward in concept: a blower system continuously feeds air into the sealed dome, and that internal pressure — just slightly higher than the air pressure outside — is enough to push the fabric outward into a stable, self-supporting shape. Stop the blower, and the structure gradually loses pressure and comes down. Keep it running, and the dome stands as a genuinely rigid enclosure, with no internal columns or trusses interrupting the space underneath.

How Single Skin Air Domes Work

The engineering behind an air-supported structure comes down to a balance of forces. The fabric membrane is anchored securely around its perimeter — typically to a concrete or ground-level foundation — and sealed to be airtight. Blower fans then pressurise the interior just enough to counteract the fabric's own weight and any external loads like wind, holding the membrane taut in its dome shape.

Because the fabric is under constant tension from the internal pressure, the same double-curved geometry principles that apply to other tensile structures come into play here too — the rounded dome shape distributes stress evenly across the entire surface, which is part of why air domes can span large areas without any internal support at all.

Airlocks or revolving doors are typically used at entry points, allowing people and equipment to move in and out without letting enough air escape to destabilise the pressure inside. The blower system runs continuously (sometimes with a backup blower for redundancy), since maintaining that pressure differential is what keeps the whole structure standing.

Single Skin vs the Broader Category of Air-Supported Structures

"Air-supported structure" is the umbrella term for any building held up by internal air pressure rather than a rigid frame, and single skin domes are one form within that category. What defines a single skin design specifically is the single continuous fabric layer — no trapped insulating air layer between two membranes, just one fabric envelope doing the full job of enclosure and pressure containment.

This makes single skin domes a comparatively simpler structure to design and install than double-membrane alternatives, since there's only one fabric layer to fabricate, seal, and maintain. That simplicity is a big part of their appeal for applications where a fully insulated, climate-controlled enclosure isn't the primary requirement.

What Is a Temporary Dome Structure?

Air domes are frequently used as temporary or semi-permanent structures — meaning they're designed to be installed, used for a defined period or purpose, and then deflated and either relocated or removed, rather than functioning as a permanent building. This is one of the practical advantages of air-supported design: because the structure doesn't depend on a rigid frame, it can be deflated relatively easily and either stored, moved to a new site, or dismantled for reconfiguration.

That said, "temporary" doesn't mean flimsy. A well-engineered single skin dome, built with the right fabric and a properly maintained blower and anchoring system, can serve reliably as a long-term enclosure — the temporary or relocatable nature is about design flexibility, not durability.

What the Fabric Is Made Of

The fabric membrane is really the heart of a single skin air dome — it's simultaneously the roof, the walls, and the pressure vessel, all in one continuous layer. That means the fabric needs to combine strength, flexibility, and airtightness in a single material.

At Biodomes Membranes India, the fabric used for air dome applications is built around PVC and PVDF coated textiles:

• PVC (Polyvinyl Chloride) coated fabric — offers strong flexibility and reliable airtightness, and welds cleanly into the large, seamless panels needed for a dome envelope. Its adaptability makes it well suited to the curved geometry of a dome structure.
• PVDF (Polyvinylidene Fluoride) coated fabric — a fluoropolymer coating engineered for added resistance to UV exposure and long-term outdoor weathering, useful for domes that will sit under continuous sun exposure.

Both are woven textile bases combined with a polymer coating engineered specifically for tensioned, pressurised, outdoor use — which is a meaningfully different requirement than a standard tarpaulin or general-purpose waterproof sheet.

Properties That Matter for Inflatable Structure Fabric

An air dome's fabric is under continuous stress from internal pressure, so a few properties matter more here than in most other fabric applications:

• Airtightness — a fully sealed coating that holds pressure without leaking through the weave
• Tensile strength — able to handle sustained pressure loads across the full curved surface without stretching out of shape
• Weldable seams — large panels joined into a continuous, airtight envelope, since every seam is a potential pressure-loss point
• Flexibility — pliable enough to be fabricated into the dome's curved geometry without weak points at the folds
• UV and weathering resistance — built to hold up under prolonged outdoor exposure across changing seasons

Applications of Single Skin Air Domes

Single skin air domes show up across a genuinely wide range of industries:

• Sports facilities — tennis courts, indoor fields, and practice domes that need a large, column-free covered space
• Storage and warehousing — covering bulk materials, equipment, or stock without the cost of a permanent building
• Industrial and agricultural enclosures — including applications like biogas covers, where an air-supported structure provides reliable, large-span coverage
• Event and exhibition spaces — quickly deployable covered space for temporary events
• Emergency and relief shelters — rapid deployment where speed of setup matters as much as the enclosure itself

Across all of these, the shared appeal is the same: a large, unobstructed covered space that can be installed relatively quickly and doesn't require the foundation work or construction timeline of a conventional building.

Choosing a Fabric Manufacturer for Air Dome Projects

Because the fabric membrane carries so much of the structural and functional load in an air dome, sourcing it from a manufacturer that understands pressurised, tensioned fabric applications specifically matters a great deal. A few things worth checking:

• Coating expertise — a clear understanding of how PVC and PVDF coatings perform under sustained internal pressure and outdoor exposure
• Large-format welding capability — the ability to weld panels into a seamless, airtight envelope sized to the dome's dimensions
• Fabrication precision — cutting and welding to the curved geometry the dome design requires, since inaccuracies here translate directly into uneven stress once pressurised
• Consistency — reliable quality across large orders, since an air dome is only as airtight as its weakest seam

Biodomes Membranes India works with PVC and PVDF coated fabric engineered for pressurised, tensioned structures like single skin air domes. The focus stays on getting the material fundamentals right — a strong, airtight coating and fabrication precision that holds up once the structure is inflated and under continuous use.

If you're sourcing fabric for an air dome or similar pressurised structure, you can see the current range at Biodomes Membranes India.

Frequently Asked Questions

What's the difference between a single skin and double skin air dome?

A single skin dome uses one continuous fabric layer held up by internal air pressure. A double skin dome uses two fabric layers with insulating air trapped between them, generally used where more climate control is needed.

Do single skin air domes need constant power to stay inflated?

Yes. A blower system continuously maintains the internal pressure differential that holds the dome's shape, so a reliable power supply (often with backup) is part of the design.

Are single skin air domes suitable for permanent use?

While often used as temporary or relocatable structures, a well-engineered single skin dome with quality fabric and properly maintained systems can serve reliably over the long term.

What fabric is best for an air dome application?

PVC and PVDF coated fabrics are both engineered for the airtightness, tensile strength, and weldability that pressurised dome structures require. The right choice depends on the specific project's exposure conditions and requirements.

Can single skin air domes be used for industrial applications like biogas covers?

Yes. The same air-supported principle is used across industrial applications, including biogas dome covers, where a large, reliable, pressurised enclosure is needed.