DYNAVOID
EPS Void Form Built For Concrete Slabs
Dynavoid is an EPS void form designed for structural slabs on expansive soils. It supports construction loads, then gradually collapses under sustained soil uplift to reduce pressure beneath concrete slabs.
- Controlled Collapse Performance
- Supports Concrete Placement Loads
- Built for Expansive Soils
- Protects Structural Slabs
What is Dynavoid?
Dynavoid is an EPS void form designed for use beneath structural concrete slabs in expansive soil and heaving subgrade conditions. During construction, it supports concrete and rebar loads until the slab becomes self-supporting.
After the slab is self-supporting, Dynavoid acts as a dynamic inclusion beneath the concrete. As underlying soils move upward, its engineered leg geometry and thermoplastic creep allow the form to collapse in a controlled way, creating relief space and helping reduce damaging uplift pressure beneath the slab.
Dynavoid is made from closed-cell EPS, giving it all-weather performance in wet or freezing conditions while adding under-slab insulation value. It can also be cut to fit around columns, penetrations, and other slab details.
Dynavoid Applications
- Structural slabs
- Foundations in expansive soils
- Industrial pads and heavy slabs
How Dynavoid Collapses Under Soil Uplift
Dynavoid supports the slab during placement, then gradually collapses under sustained subgrade uplift to help relieve pressure beneath the concrete.
Supported Concrete Thickness Range
10″ – 8.2 ft. (254 mm –
2.5 m)
Standard Product Thicknesses
4″ and 6″ (100mm and 150mm)
Dynavoid Technical Data
Dynavoid is available in 4′ × 4′ panels, with multiple performance ranges available to suit slab loading and subgrade conditions. The correct Dynavoid performance range should be selected based on slab loading and subgrade conditions.
Subterra Protection Board
For added surface protection, Subterra Protection Board can be installed above Dynavoid to help distribute point loads and protect the void form during construction. Its durable polypropylene-faced EPS/GPS construction also supports under-slab moisture, vapour, and radon-resistant assemblies when installed according to the Installation Guide.
Planning a project with Dynavoid?
Contact Beaver’s sales team for product specifications, application guidance, and project support.
