Cupolex Overview

CUPOLEX® Plastic Dome Concrete Forms are stay-in-place forms to create unreinforced or reinforced concrete slabs on grade and other concrete structures. Concrete is poured over the modular dome forms to create floating or structural slabs on grade. The unique concrete geometry Cupolex creates, forms an under slab void that can be vented to remove moisture and soil gases or provide solutions for various sustainable construction applications – uses less concrete and reinforcing than a standard slab with equivalent load bearing capacity.

CUPOLEX® Patented Forms have unique connecting features. Only, CUPOLEX® forms additional built-in plastic at all pressure point locations and a central reinforced cone support of equal height to the element and positioned in correspondence of the central region, guarantees the absorption of vibrations which occurs during the finishing of the concrete Aerated floor slab.

Ancillary Products

The Pontex element combined with CUPOLEX® used to create beams or as stiffening ribs for structural concrete slabs & pavements.

The BETON STOP element for closing the side openings of the CUPOLEX® forms.


  • Radon & Soil Gas (VI) Mitigation
  • Alternative to Structural or light weight fill
  • Structural Slab Foundations
  • Post tensioned reinforced Concrete Slabs
  • Monolithic poured concrete foundation slabs
  • Concrete Slab on Grade or basement slabs
  • Concrete Structural Supported Slabs
  • Concrete Pavements and Roads
  • Suspended Pavements for Creating Soil Cells
  • Replacing Gravel Drainage Layers
  • Replacing Vapor Barriers & Liners

  • Concrete Stormwater Detention Tanks
  • Concrete Stormwater Retention Tanks
  • Solution for Structural Weight Limits
  • Refrigeration & Freezer Floors
  • Building Green With LEED
  • Challenging & Expansive Soils
  • Concrete Subfloor Crawl Space
  • Technical/Electrical Sub Floors
  • Acoustical Floors


Cupolex® provides Excellent Flexibility in Working with new construction or remodeled building layouts. The main characteristics of the forming system are speed and simplicity, with maximum benefits being realized when the Cupolex system is engineered during the early design stages in assessing site and soil conditions, considering elevations of various sections of the slab area that may have to be raised of for example if strip footings, walls or other typically formed sections can be incorporated within the system, cost savings and environmental benefits can be realized.


On average two laborers set 140 m2/hr (1500 sf/hr)

  • Layout complies with a grid system
  • Each Cupolex® Form has an installation arrow
  • Forms are Installed by starting from left to right and top to bottom
  • Ensure that the feet connection pins are correctly inserted into their holes
  • Pouring and finishing of the concrete slab in the conventional manner

Available Form Heights

Cupolex forms are available and various heights to suit any site conditions or design requirements. Made from 100% recycled Polypropylene (PP) plastic. The forms provide the maximum performance and guarantees superior characteristics of stability and resistance in its structure to allow operations that are completed directly above the plastic Cupolex® elements before and during the placement of the concrete.

Watch Video to See How Cupolex is Installed

Form TypeOverall Form DepthPlan Dimension InstalledConcrete Consumption To Top of DomesClear Void EquivalentDead Load of Concrete Structure to Top of DomesData SheetCAD Block
cm (inch)cm (inch)m3/m2 (cy./sq.ft.)cm (inch)kPa (psf)
WINDI 5-565 (2")56x56 (22"x22")0.008(0.0010)4 (1.57")0.19 (3.96)PDFDWG
WINDI 10-5610 (4")56x56 (22"x22")0.030(0.0036)7 (2.76")0.71 (14.82)PDFDWG
CUPOLEX 9.5-569,5 (4")56x56 (22"x22")0.014 (0.0017)8 (3.15")0.33 (6.89)PDFDWG
CUPOLEX 13.5-5613,5 (5")56x56 (22"x22")0.030 (0.0036)11 (4.33")0.71 (14.82)PDFDWG
CUPOLEX 16-5616 (6")56x56 (22"x22")0.035 (0.0043)14 (5.50")0.83 (17.33)PDFDWG
CUPOLEX 20-5620 (8")56x56 (22"x22")0.035 (0.0043)17 (6.69")0.83 (17.33)PDFDWG
CUPOLEX 26-5626 (10")56x56 (22"x22")0.045 (0.0055)22 (58.66")0.83 (17.33)PDFDWG
CUPOLEX 30-5630 (12")56x56 (22"x22")0.042 (0.0051)26 (10.24")0.99 (20.67)PDFDWG
CUPOLEX 35- 5635 (14")56x56 (22"x22")0.045 (0.0055)31 (12.20")1.06 (22.13)PDFDWG
CUPOLEX 40-5640 (16")56x56 (22"x22")0.060 (0.0073)34 (13.39")1.42 (29.65)PDFDWG
CUPOLEX 45-5645 (18")56x56 (22"x22")0.064 (0.0078)39 (15.35")1.51 (31.53)PDFDWG
CUPOLEX 50-5650 (20")56x56 (22"x22")0.065 (0.0079)44 (17.32")1.53 (31.95)PDFDWG
CUPOLEX 55-7155 (22")71x71 (28"x28")0.069 (0.0080)48 (19.29")1.63 (34.04)PDFDWG
CUPOLEX 60-7160 (24")71x71 (28"x28")0.070 (0.0085)53 (20.87")1.65 (34.46)PDFDWG
CUPOLEX 65-7165 (26")71x71 (28"x28")0.071 (0.0090)58 (22.83")1.68 (35.08)PDFDWG
CUPOLEX 70-7170 (28")71x71 (28"x28")0.073 (0.0095)63 (24.80")1.72 (35.92)PDFDWG
To begin using the CUPOLEX® for your project, visit our CUPOLEX SOLUTIONS page for a step-by-step road map on using this product.

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