Plaza Waterproofing Calculator

Waterproofing assembly for pedestrian plaza over occupied space.

Plaza length (ft)

Plaza width (ft)

Traffic (1=ped, 2=light veh, 3=heavy)

Number of drains

Expansion joints (linear ft)

Finish (1=pavers, 2=topping slab)

Tab to move between fields

Membrane area (sq ft)

7,311

Membrane thickness (mils)120

Slope layer (cu yd)111.1

Drainage composite (sq ft)6,300

Waterproofing cost ($)$90,043

Total project cost ($)$169,543

Cost per sq ft ($)$28.26

How to Use This Calculator

Enter Plaza Length (ft) and Plaza Width (ft) — the total occupied-space deck area to be waterproofed.
Select Traffic Type (1=pedestrian, 2=light vehicular, 3=heavy vehicular) to determine membrane thickness requirements.
Enter Number of Drains and Expansion Joints (linear ft) requiring waterproof detailing.
Choose Finish Type (1=pavers on pedestals, 2=concrete topping slab) to complete the assembly cost estimate.
Review Membrane Area (sq ft), Membrane Thickness (mils), and Slope Layer (cu yd) for material ordering.
Use Waterproofing Cost and Total Project Cost to validate the budget before design development.

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