A dropped kerb with no underfoot warning is invisible to a pedestrian using a cane or with reduced vision until they are already stepping into traffic, which is the exact hazard that DDA-compliant blister tactile paving is designed to flag through a raised dot pattern anyone can feel through a shoe sole or cane tip. Manufactured from precast concrete to BS EN 1339:2003, these slabs are the standard specification for dropped kerbs, controlled crossings and pedestrian routes across the UK.

Why the blister pattern and colour both matter

Tactile paving works on two senses at once: the raised blister dots give a distinct underfoot and cane-detectable texture that is different from the surrounding flat pavement, while the slab colour gives a secondary visual cue to anyone with partial sight. Guidance from the Department for Transport specifies red blister paving at controlled crossings, such as pelican and zebra crossings, and buff at uncontrolled dropped kerbs, so installers can identify the crossing type by colour alone. Each slab is cast as a single dense concrete unit rather than a surface-applied texture, so the blister pattern does not wear smooth or peel the way a stuck-on tactile strip can. Thicknesses of 50mm and 65mm let the slab be bedded to match the depth of the surrounding paving course, and the 450 x 450mm size is available where a scheme's paving module calls for it.

• Cast concrete blisters – won't wear smooth or peel like an applied tactile strip
• BS EN 1339:2003 compliant – meets the recognised UK standard for precast concrete paving
• Colour-coded to DfT guidance – red for controlled crossings, buff for uncontrolled dropped kerbs
• 50mm or 65mm thickness – matched to the depth of the surrounding paving course
• 400mm or 450mm format – fits standard and wider paving bond patterns

Where it's used

These slabs are specified at dropped kerbs, pelican and zebra crossings, pedestrian refuges, shared surfaces and any footway location where the Department for Transport's tactile paving guidance requires an underfoot warning. They're specified by local authorities, highways contractors, housing developers and landscapers on public realm and residential access schemes.

Specifications

Choosing the right option

Follow Department for Transport guidance on colour: specify red at controlled crossing points such as pelican and zebra crossings, and buff at uncontrolled dropped kerbs and general pedestrian routes. Match thickness to the surrounding paving course depth so the finished surface sits flush rather than proud or recessed; 50mm suits most standard footway build-ups, while 65mm suits a deeper bedding course or where the slab needs to take occasional vehicle overrun at a driveway crossing. The 450 x 450mm buff format is available where your paving bond or module calls for the larger unit; 400 x 400mm is the more widely stocked format across both colours and both thicknesses. Always confirm the exact pattern and colour required against the relevant highways or accessibility specification for your scheme before ordering, since requirements can vary by local authority.

Installation, use & care

Lay slabs on a full mortar bed over a properly compacted sub-base, in line with the same bedding method used for the surrounding paving, keeping joints tight and consistent with adjacent flags. Prime the underside of each slab with a suitable slurry before bedding to improve adhesion and reduce the risk of movement. Once laid, tactile paving needs no ongoing maintenance beyond the routine sweeping and jointing upkeep given to the rest of the footway; avoid pressure-washing at excessive close range, which can erode mortar joints over time.

FAQ

Do I need red or buff for my crossing?
Department for Transport guidance specifies red at controlled crossings such as pelican and zebra crossings, and buff at uncontrolled dropped kerbs; check your specific scheme's specification to confirm.

Can these slabs take vehicle traffic, such as a dropped kerb driveway?
The 65mm thickness is better suited to occasional vehicle overrun than the 50mm; confirm the loading requirement for your specific crossing with your highways specification.

Will the blister pattern wear down over time?
The pattern is cast into the full depth of the concrete slab, not applied to the surface, so it wears at the same rate as the surrounding concrete rather than peeling or smoothing off early.

Can I mix 400mm and 450mm slabs in the same crossing?
It's not recommended. Keep to one format across a single crossing or dropped kerb so the blister spacing and joint lines read as one consistent surface.

Ordering & delivery

Select your size and colour above; each combination is priced and stocked individually. These are precast concrete slabs and are heavy for their size, so please allow for palletised or multi-person handling on delivery. See the specification table and size and fitting guide further down this page if you're unsure which format your scheme requires.