The Fire Marshal’s Walk-Through: Twelve Questions Before the Snow Goes In

He arrives at 7:40, twenty minutes before the doors open, and he does not look at the snow first. He looks up: the sprinkler heads, the clearance beneath them, the gap between the top of the drift and the deflector plate. In eleven years of builds I have never once been asked whether the stuff burns before being asked how high it sits.

That order of questions is the whole briefing. A fire officer is not assessing a product. He is assessing an obstruction inside a building he has to sign off, full of people he has never met. Turn up with a safety data sheet and nothing else and the meeting sags, because you are answering a question he has not reached yet.

What he measures before he asks what it is made of

Two numbers decide most of these visits: the height of the finished surface and the distance from that surface to the nearest sprinkler deflector. Retail units commonly work to 18 inches of clear space below the deflector. A display that measures 17 inches on install day and 21 inches after four days of topping up fails on the return visit, and the return visit is the one that matters. A garden centre in the Midlands lost a weekend of trading exactly this way last December: passed on the Tuesday, failed on the Friday, and the officer had his tape out before he had his coat off.

The fix is dull and it works. Mark the maximum height on a column with tape, photograph the tape against a fixed joint, and write the number on the install sheet so whoever tops up on Saturday night knows where to stop. If the design needs more height than the clearance allows, move the drift sideways rather than up. Nobody has ever complained that a snow bank was too wide.

The three material questions, in the order they come

Eventually he asks what it is made of, what happens when it gets wet, and what happens if somebody puts a flame to it. Answer in that order, in plain words: a super absorbent polymer, water, and nothing else unless you have added dye or glitter. If you have added either, say so before he reads the label. The phrase ‘decorative additive’ turns a five-minute conversation into a forty-minute one, and you will spend it explaining why you did not mention it.

Ignition is where suppliers overreach. Do not call the product fireproof. Say what your data supports: the hydrated material does not sustain a flame in the sample tested, and the cardboard it arrived in is the bigger hazard. Then hand over the paper. One page, with a date, a laboratory name, a sample description and the batch number of the delivery on site. That page fits in a coat pocket and ends more conversations than any brochure.

Exits, and the paperwork that closes the visit

Snow raked against a fire door photographs beautifully and reads as a blocked means of escape in a report. Keep a metre of clear floor inside every final exit. If the layout cannot spare it, change the layout. Arguing at 7:40 in the morning is a losing game, and you will still be standing there when the staff arrive.

Three documents close most walk-throughs: a data sheet carrying the batch number actually on site, a one-page method statement naming who installs and how exits stay clear, and a mobile number for somebody reachable during the event. The phone number matters more than people expect. An officer who knows he can get an answer at nine on a Saturday night stops worrying about details he would otherwise escalate.

Keep all three at the display, not in a van two streets away. I have watched a build sit closed for ninety minutes while somebody drove back for a folder. The queue outside did not care whose fault it was, and neither did the centre manager who had booked the space for a charity event at eleven.

Walk your own site with a tape and a camera before anybody official does. The clearance check, the exit sweep and the paperwork list we hand to crews are in the artificial snow installation guides, and they print onto two sides of A4.