Prime Blocks Tech
A Prime Blocks Tech panel is an expanded polystyrene core held between two galvanized welded-wire meshes, tied through the core with steel connectors. On site, 4,000 psi structural mortar is applied to both faces. The result is a monolithic sandwich that carries load, insulates and finishes in one operation.
Because the details do not change. A wall base is a wall base, a corner is a corner, an opening jamb is an opening jamb — on a 144 sq ft studio and on a 2,500 sq ft courtyard house. Sheet A-4.0 of every set carries the same six details, sized to the panel that design uses.
It also means the quantities fall straight out of the drawing: panel area, mortar volume, partition length, connector runs. That is why we can quote a kit at all.
Panels are named for the EPS core thickness in millimetres. The finished thickness adds roughly 3 cm of mortar per face.
| Panel | Core | Finished | Nominal R | Typical use |
|---|---|---|---|---|
| PBT60 | 60 mm | 3.6″ | R-14 | Non-structural partition, screens |
| PBT80 | 80 mm | 4.4″ | R-18 | Interior partitions, small structures |
| PBT100 | 100 mm | 5.2″ | R-23 | Small cabins and ADUs |
| PBT120 | 120 mm | 6.0″ | R-27 | Standard exterior wall, mild climates |
| PBT140 | 140 mm | 6.8″ | R-32 | Standard exterior wall, mixed climates |
| PBT160 | 160 mm | 7.6″ | R-36 | Cold climate, taller walls |
| PBT180 | 180 mm | 8.4″ | R-41 | Cold climate, high load |
| Roof / floor panel | Clear span | Build-up |
|---|---|---|
| PBT-Slab 160 | to 14′ | EPS core slab panel with mesh both faces, concrete topping |
| PSG2-200 | to 20′ | EPS blocks over galvanized steel joists, mesh soffit, topping |
| PSG3-240 | to 26′ | Deeper joist, same build-up |
| PSG6-300 | to 32′ | Deepest joist — the widest rooms in the catalogue |
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Fire resistance. No fire-resistance rating is claimed anywhere on this site or on the drawing sheets. Where your code requires a rated assembly, obtain a current tested-assembly report for the specific build-up and submit that.
Structural values. The spans and thicknesses given here are the system's ordinary working range, not a design. Loads for your site — snow, wind, seismic — and therefore the panel selection, connections, foundation and lateral system are the responsibility of the engineer of record.
R-values. The figures above are nominal for the core and render, before thermal bridging through the connectors and before any assembly testing. Treat them as a comparison between panels, not as a compliance number.
Evaluation reports. Ask us for the current technical evaluation report before you submit to an authority having jurisdiction, and check its renewal date. An expired report will be rejected.
