Cupolex Vapor Intrusion Mitigation


Soil gas mitigation is increasingly considered as a pre-emptive strategy at sites impacted with volatile contaminants, radon or naturally-occurring biogenic gases (e.g., methane). For new building construction, there is a range of possible mitigation solutions, which often involve modification of the building envelope in contact with soil to incorporate soil gas venting and/or barrier systems. CUPOLEX® Aerated sub-floors provide a sustainable approach for soil gas mitigation and are more permeable than gravel layers, and thus are more efficient in term of venting characteristics.

While there are numerous reasons why the CUPOLEX® system outperforms the standard liner or gravel layer SSV system, there are three critical factors that make the CUPOLEX® system the superior system for your project, as well as the better choice for the sustainability and economics of the project.


These factors are:

  • more effective venting,
  • constructability, and
  • long-term maintenance costs.


CUPOLEX® aerated floor systems control vapor intrusion by either diluting sub-slab concentrations to levels of no concern (the innate attenuation that any reasonable slab provides means that sub-slab concentrations do not have to be reduced to indoor air action levels), or by depressurizing the sub-slab void space to prevent upward flow of air into the building.


Advantages of CUPOLEX® sub-floor venting include:

  • Provides a highly efficient under-slab void network than less efficient sand or gravel venting layers
  • More Efficient Venting
  • Passive Venting Potential
  • CUPOLEX® floors do not require membranes
  • Low capital cost,
  • Fast assembly and can be installed by any concrete slab contractor or forming contractor
  • The ability to cut the slab at any location and easily repair,
  • The ability to easily test, monitor and enhance performance,


  • Single and multi-residential dwellings
  •  Commercial buildings
  • Institutions and hospitals
  • Light and heavy Industrial buildings
  • Adaptable to any type of slab foundation design

Design & Engineering

We provide PE stamped shop drawings through our engineering partners globally, construction training, and installation observation and we work closely with the design team, the contractor, and the owner to ensure the success of the project.  Each site is different, and working with project partners to find installation solutions that address specific site needs is a part of the service we provide.

To begin using the CUPOLEX® for your Brownfield redevelopment project or as a pre-emptive building control measure at your site, visit our Getting Started page for a step-by-step road map on using this product.

Watch Video For More On Cupolex Vapor Intrusion


Please consult the Cupolex Technical Data Sheet for details of the physical properties of the product range. The appropriate height of Cupolex should be selected based upon the required equivalent void and the concrete thickness above the domes is based on the maximum load capacity that the Cupolex slab is required to support. This information is provided in the table below:


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


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