Roof decks and podium terraces have a problem at-grade patios don’t: a waterproof membrane that must stay untouched, a slope built in for drainage, and a walking surface that still needs to be dead level. Pedestal pavers solve all three at once — which is why they’ve become the default specification for rooftop amenity spaces, hotel terraces, and multifamily podium decks.
How a pedestal system works
Instead of mortar or a sand bed, each slab rests on adjustable pedestals set directly over the waterproofing. The result:
- Free drainage — water passes through open joints and runs off on the membrane below; no ponding on the surface
- A thermal-break air gap between slab and roof assembly
- Impact-sound reduction for occupied space below
- Adjustable leveling — a dead-level surface over a sloped deck, with no mortar and no wet trades
- Serviceability — individual slabs lift out for membrane access
The slabs: engineered lighter and stronger
Because pedestal slabs span between supports rather than bearing on a full bed, they’re cast differently. ModaPAVE pedestal slabs are 1.5″ thick wet-cast concrete produced to an 11,000+ psi internal compressive-strength target (flexural 800 psi minimum, slab method ref. ASTM C1782 / C293), with water absorption ≤ 5%.
- 24×24 Pedestal — the standard module for pedestal grids · 4.0 sq ft · 64 lb per slab
- 32×16 Pedestal — a 2:1 directional format for running-bond fields · 3.56 sq ft · ~57 lb per slab
Both come in five through-body colors (White · Gray · Platinum · Sand · Graphite) with a Micro Terrazzo R9+ finish standard. A bush-hammered R11+ finish and a factory penetrating sealer are available as order add-ons, applied in Tecate before shipping — mention them when you request a quote. Slabs are held to ±1/16″ flatness between adjacent units with ADA lippage ≤ 1/4″.
What to coordinate before you order
- Membrane and warranty: confirm the pedestal system is approved over your waterproofing assembly.
- Pedestal heights: map deck slope to pedestal adjustment range so the finished surface lands level at doors and edges.
- Wind uplift and edge conditions: coordinate your engineer and pedestal supplier — perimeter and corner zones often need specific detailing.
- Load path: confirm the structure is rated for the assembly (a 24×24 pedestal slab weighs 64 lb — about 16 lb/sq ft before pedestals and live load).
At grade instead?
The same formats come in 1.75″ grade-set versions for ground-level patios and pool decks on a compacted base — see the grade-set collection. Same colors, same finish system, so a podium terrace and a ground-floor courtyard can read as one continuous surface.
Color note: all ModaPAVE slabs use natural iron-oxide pigment, so order the Concrete Color Sample Pack or a single slab before a full order. For project pricing, send us your plans — CAD, PDF, or BIM — and we’ll return a written quote within 48 hours.
FAQ: Pedestal Pavers
Why not mortar-set pavers on a roof deck?
Mortar bonds the surface to the membrane, blocks drainage, adds dead load, and makes membrane repairs destructive. Pedestals keep the membrane accessible, drain freely, and allow individual slabs to be lifted for service.
What thickness do pedestal pavers need to be?
ModaPAVE pedestal slabs are 1.5″ thick, cast to a higher-strength mix (11,000+ psi internal target) because the slab spans between pedestal supports instead of bearing on a full bed. Always confirm span and loading with your engineer.
Do pedestal pavers work for residential rooftops?
Yes — the same system used on hotel and multifamily amenity decks scales down to residential roof terraces and balconies, provided the structure and membrane are confirmed for the load and detailing.