EPS cavity board with moulded drainage knobs, and the SANS 28 double-triangle tie that goes through it — insulation, a drained 25 mm cavity and the tie, as one system.
Kit: 4 of 5 documents
LiteCel® CD is one system: a moulded EPS cavity-and-drainage board, and the SANS 28 double-triangle tie that passes through it. Knobs on the board's outer face hold a clear 25 mm cavity against the outer leaf, so rain that penetrates the face brick runs down the channels between the knobs and discharges through weep holes at the DPC, while the 35 mm EPS base insulates the wall. The board is 425 mm high — five brick courses, which is also the tie spacing. Board and tie are specified, supplied and detailed together.
| Property | Value | Standard |
|---|---|---|
| Product type / build-up | Moulded EPS cavity-and-drainage board — 35 mm insulation base with moulded drainage knobs on one face | — |
| Panel size (H × L) | 425 × 1240 mm | — |
| Build-up (insulation base + drainage knobs) | 35 mm EPS base + 25 mm drainage knobs | — |
| Coverage per board | 0.527 m² | — |
| Nominal density | 30 kg/m³ | — |
| Thermal resistance R — 35 mm EPS base | 0.97 m²K/W (estimated) | — |
| Thermal resistance R — 25 mm drainage cavity (vertical, unvented top) | 0.16–0.18 m²K/W (estimated) | — |
| Thermal resistance R — board + cavity | 1.13–1.15 m²K/W (estimated) | — |
| Typical cavity wall performance | R 1.6–1.8 m²K/W; U 0.55–0.63 W/m²K — dependent on wall construction and finishes | SANS 10400-XA |
| Weep holes | 600 mm centres in the vertical joint | SANS 10400-K |
| Wall tie — tie type | Double triangle | SANS 28 Table 4 |
| Wall tie — lengths (L) | 150 ± 5 and 200 ± 5 mm | SANS 28 Table 4 |
| Wall tie — wire diameter — galvanised mild steel | 4,3 ± 0,1 mm | SANS 28 Table 4 |
| Wall tie — wire diameter — stainless steel | 4,0 ± 0,1 mm | SANS 28 Table 4 |
| Wall tie — width (B) / leg (Z) | 65 ± 5 / 50 ± 5 mm | SANS 28 Table 4 |
| Wall tie — stainless grade | Austenitic, minimum 18% chromium and minimum 8% nickeli.e. type 304. Supplied against a mill certificate showing the actual chromium and nickel contents | SANS 28 2.3.5 |
| Wall tie — zinc coating (galvanised) | Minimum mass of zinc 750 g/m², measured on the finished tie | SANS 28 2.4.1 / SANS 935 |
| Wall tie — packing | Wire-secured bundles of 100, each bundle a single type, length and material | SANS 28 3.1 |
| Wall tie — marking | Metal tag per bundle carrying the manufacturer's mark, the count and the nominal length | SANS 28 3.2 |
| Wall tie — permitted cavity width | 50–75 mm. Above 75 mm a vertical-twist strip tie is required, not a wire tie | SANS 10164-1 5.2.1.4(b), (c) |
| Wall tie — tie length vs cavity | L ≥ cavity width + 100 mm, giving the required 50 mm embedment in each leaf. So L150 suits a 50 mm cavityL200 suits up to 100 mm | SANS 10164-1 5.2.1.4(a) |
| Wall tie — spacing, LiteCel detail | 425 mm vertical (every fifth course, matching the board height) × 600 mm horizontal = 3,92 ties/m²Check against the code minimum below for the leaf being built | — |
| Wall tie — minimum ties per m² of wall | 2,5 (leaf ≥90 mm, cavity 50–75 mm) · 5,0 (leaf 65 mm, cavity 50–75 mm)Plus extra ties at not more than 300 mm of height beside openings and at movement joints | SANS 10164-1 Table 7, 5.2.1.4(a) |
| Wall tie — coastal use | Within 30 km of the coast a tie needs 750 g/m² of galvanisingwhich is the SANS 28 2.4.1 baseline for every galvanised tie in any case — and stainless in tidal splash zones. That is a floor: SANS 28 D.3 regards stainless as adequate in any location and D.4 declines to set any distance line | SANS 10400-K 4.2.1.4 |
The R-values are calculated estimates, not measured results — the brochure's own thermal table is headed “THERMAL PERFORMANCE (Estimated)”. The 0.97 m²K/W quoted for the 35 mm base implies a λ of about 0.036 W/m·K. Confirm the figures with Technopol before relying on them in a SANS 10400-XA submission. R 1.6–1.8 / U 0.55–0.63 is a whole-wall figure for a typical cavity wall, not a property of the board. The brochure scopes it explicitly: “dependent on wall construction & finishes”. The board is a drained-cavity system, not a cavity fill: the 25 mm gap the knobs hold open is what carries penetrating water down to the DPC and out through the weep holes. Mortar droppings that bridge that gap defeat the drainage path. The double-triangle type is the tie the LiteCel CD board is detailed around. Its 60 mm cavity (35 mm board + 25 mm drainage gap) needs the 200 mm tie: 60 + 50 + 50 = 160 mm of tie. Ties per m² is not a property of the tie. It depends on the leaf thickness and the cavity width, and on a 65 mm leaf the code asks for twice as many as on a 90 mm leaf. Take the figure from SANS 10164-1 Table 7 for the wall being built, and add the extra ties the same clause requires beside every opening and at every movement joint. Technopol does not offer the single-wire type for cavity walls. SANS 10164-1 5.2.1.4(b) excludes it: “ties of the single wire type shall not be used”. It is available for faced and collar-jointed walls on request.
Values from Technopol technical documentation. Confirm the exact figures for your specification with Technopol.
The same product does a different job in each of these assemblies - each page states the target, the clause and the limits.
Payment is taken by PayFast. Card details are entered on PayFast's own secure page and never touch this site. Prices include VAT.
Tell us you want it. We will email you the day it is available, with the price — and the interest we log here is what decides how much of the first run we make.
Send us the drawings. We will size it, detail it and quote it.
We release technical documentation to named engineers and specifiers so we can support you properly on the project. One entry unlocks everything.
We will email you this document, and we may follow up about it. We will not add you to anything else unless you tick the box. We do not share or sell your details. How we handle your information.