Are Garden Domes Safe? Fire Safety Explained

Fire safety: what fire classifications mean

In the UK and EU, the way a building material behaves in a fire is classified under EN 13501-1, the European reaction-to-fire classification. It grades how readily a material ignites, how much heat and flame it adds, and how quickly fire spreads across it:

• Class A (split into two grades): non-combustible or of very limited combustibility. These materials add little or nothing to a fire.
• Classes B, C and D: combustible, contributing progressively more to fire growth from B to D.
• Classes E and F: E is the lowest tested class; F means no performance has been determined.

Many classifications also carry two extra ratings: s1 to s3 for smoke production (s1 is the lowest) and d0 to d2 for flaming droplets (d0 means none). So a full classification reads like "B-s1, d0".

Two points help when you read any product's fire information. First, a classification belongs to the specific product that was tested, at a particular grade and thickness, so ask for documentation that matches what you're buying rather than relying on a general claim about the material. Second, EN 13501-1 describes reaction to fire, not fire resistance (how long a wall or door holds back a fire), which is classified separately under EN 13501-2.

For a private garden, the practical fire risks are heaters, electrics and naked flames, which is where the advice below focuses. Hospitality, glamping and events sites are different: the business needs a fire risk assessment covering the whole setup, and a venue or insurer may ask for documented classifications. If your venue needs a specific fire classification (UK/EU: EN 13501-1), contact us and we'll confirm the documentation.

Impact safety: why polycarbonate doesn't shatter

Glass shatters into sharp shards; polycarbonate doesn't. As a material, polycarbonate is around 250 times more impact resistant than glass, and it flexes and absorbs impact rather than breaking, the same property that makes it the material for riot shields and bullet-resistant glazing. In a garden setting that means a stray football, hail, a falling branch or a knock won't produce dangerous broken glass. This is a genuine safety advantage around children, pets and entertaining.

Structural safety

A dome must be anchored to be safe. Every GeoDomeX dome comes with anchoring brackets so it stays put in the wind, and the geodesic shape spreads wind and snow loads across the whole frame. Anchored domes are engineered for strength in wind and snow, and the Ultra and Extreme specifications, with thicker panels and stainless steel fixings, suit windy, coastal, exposed or high sites. A correctly anchored dome of the right specification is a stable structure. If you'd rather leave it to us, our Built for you installers can build and anchor your dome.

Sensible safety practice (your part)

The material and the anchoring are the foundation; safe use is down to you, and these are the habits that matter.

Heating

• Choose electric heating. A thermostatic electric heater (oil-filled radiator, convector or infrared panel) gives clean, dry warmth with no flue. Look for tip-over and overheat cut-outs.
• Keep your clearances. Follow the heater manufacturer's minimum distances, keep heaters well away from the panels, curtains, cushions and throws, and never aim one at the panels. Polycarbonate is tough, but like any plastic it softens if it gets very hot.
• Switch off when you leave. Don't leave a high-output heater running unattended or overnight.
• No unflued gas or paraffin heaters. They release moisture and combustion gases into an enclosed space and aren't suitable for a dome.
• Treat a wood burner as a professional job. A stove needs a HETAS-registered installer, a proper flue, calculated clearances and heat shielding from the panels, a non-combustible hearth and a carbon monoxide alarm. Our wood burner guide covers it in detail.

Ventilation and carbon monoxide

• Ventilate whenever you heat. Open the roof vents and windows from time to time to clear moisture and keep the air fresh.
• Fit a carbon monoxide alarm wherever there's a fuel-burning appliance, and test it regularly.
• Keep barbecues, fire pits and patio heaters outside, well away from the dome. Never bring a barbecue inside, even one that has gone out, because it can keep giving off carbon monoxide.

Electrics and everyday habits

• Use a registered electrician for any permanent power supply, with RCD protection and outdoor-rated fittings. In England and Wales this work comes under Part P of the Building Regulations.
• Don't overload sockets or chain extension leads together.
• Swap candles for LEDs. Every GeoDomeX dome comes with a free Ambient LED lighting kit, which gives you the glow without the flame.
• Fit a smoke alarm if you sleep in the dome or spend long evenings out there.
• Keep the way out clear. Leave a clear path to the sliding door so everyone can get out quickly.

For more on keeping the space warm and fresh, see how to heat a garden dome and our ventilation guide.

Frequently asked questions

Sources: polycarbonate material data from A&C Plastics, Piedmont Plastics and KASTLITE; reaction-to-fire classification framework from EN 13501-1.