Retail Entrance Slip Testing

The wet-weather transition problem

When customers enter a retail premises in rain, snow or sleet, water is carried in on shoes for the first 5–10 metres. Entrance matting is intended to absorb this water, but performs at perhaps 40–60% efficiency in heavy rain even when correctly specified and maintained. The remaining moisture transfers to the floor immediately past the matting.

If the floor in that zone is polished tile, polished concrete or any low-PTV-wet surface, it produces a foreseeable slip risk every time it rains. The pendulum test on the actual entrance surface, wet, is the only way to know whether the design copes.

Mat specification — what actually works

• Length matters more than thickness: a 6m mat run absorbs substantially more water than a 3m mat of identical material
• Recessed mats outperform laid mats: they accept more water before saturating and don't curl up at edges
• Bristled topping performs better in heavy rain than carpet pile, which saturates faster
• Saturated mats are worse than no mat: a saturated mat releases water onto the floor as the customer steps off

Where retail slip claims actually originate

From our retail claim work, the most common pattern is: customer enters in wet weather, walks the matted run, transitions onto polished tile beyond the mat — and slips on the shed water that has transferred from their shoes. The mat itself is not the slip surface; the floor immediately past it is.

The pendulum-tested wet-PTV on that transition zone is therefore the central evidence in most retail entrance slip claims.

Shopping centre common parts

Shopping centres add a further layer because mall common-parts entrances feed into individual retailer doorways downstream. The mall operator and the retailer both have duty-of-care exposure for slip risk in the transition zones. Periodic pendulum testing of mall common parts is increasingly built into shopping-centre risk management.

Retail park and entrance approach

External retail park paving up to and including the entrance threshold is also part of the slip-risk picture. Algae, leaf litter, frost and de-icing residue all affect external-paving PTV in ways that vary seasonally. External paving testing is often combined with internal entrance testing for a full risk picture.