Description
Board depth decides plug length, and the 180 mm LTX is the point in the range where a 140 mm board still lands a 30 mm bite in sound masonry. Renders World holds the length alongside the rest of the insulation fixing accessories range, so a wall that steps from reveal to main elevation runs on one drill setting.
What the LTX-10180 Fixes on a UK Insulated Wall
The LTX 180mm polystyrene fixing plug 200pcs box supplies hammer-in anchors assessed under ETA-16/0509, each seated 30 mm into masonry to hold a 140 mm board on new-build walls before basecoat.
The body is polyethylene and the pin is glass-fibre reinforced polyamide, so no metal runs from masonry to render. The Klimas data sheet declares a point thermal transmittance of 0.001 W/K at surface mount and 0.000 W/K where the head is recessed and capped, which is why the immersed method is worth the extra seconds per fixing on a deep board.
The assessment covers five substrate categories, and that breadth is what lets one length serve a mixed terrace:
- Solid substrates, categories A and B: concrete from C12/15 to C50/60, solid clay brick and calcium silicate solid brick. The highest characteristic pull-out figures in the table sit here, at 0.75 kN for C20/25–C50/60 concrete (≥ 2.30 kg/dm³) and for solid clay brick (≥ 2.00 kg/dm³).
- Hollow and perforated, category C: calcium silicate hollow blocks, vertically perforated clay brick and Porotherm 25. The Porotherm 25 row (≥ 0.80 kg/dm³) carries the lowest figure in the table at 0.40 kN, and rotation-only drilling is what holds it.
- Lightweight and aerated, categories D and E: lightweight aggregate concrete (≥ 0.88 kg/dm³) at 0.60 kN, AAC2 (≥ 0.35 kg/dm³) at 0.50 kN. In aerated concrete the anchorage steps to 50 mm and the hole to 60 mm.
Every one of those figures is a characteristic value with a partial safety factor of γM = 2.0 applied in the absence of national regulations, so the design load per fixing is half the table value before the wind-load calculation is even opened.
Why Installers Fit the 180 mm Length Rather Than Stepping Up
Five things separate this length from the ones either side of it on a working elevation.
- Board reach in four documented cases: 140 mm new-build without a cutter, 160 mm with one, and 120 mm or 140 mm respectively on old buildings where 20 mm of existing plaster sits under the adhesive.
- A pin that leaves the thermal calculation alone: at 0.000 W/K immersed there is no point bridge to allow for, where a steel-pin equivalent puts one at every anchor position across the wall.
- A 60 mm collar built for the mortar: the manufacturer's catalogue describes a stiffened support collar with adhesive pockets, so the basecoat keys into the plate rather than sitting over it.
- One length across five substrate categories: a short expansion zone with 30 mm embedment is assessed on concrete, solid brick, hollow blocks, lightweight aggregate concrete and aerated concrete alike.
- Predictable geometry for setting out: 100 mm minimum substrate thickness, 100 mm minimum fastener spacing and 100 mm minimum edge distance, which makes the corner zone easy to mark before the drill comes out.
Technical Specifications From the Klimas LTX-10 Data Sheet
| Parameter | Value |
|---|---|
| Product code | LTX-10180, boxed as LTX10180(200) |
| Plug diameter (dk) | 10 mm |
| Overall length (Lk) | 180 mm |
| Collar diameter (Dk) | 60 mm |
| Anchorage depth (heff) | 30 mm; 50 mm in aerated concrete |
| Hole depth (h0) | 40 mm; 60 mm in aerated concrete |
| Body / pin material | PE / PA + GF |
| Point thermal transmittance (χ) | 0.001 W/K surface, 0.000 W/K immersed |
| Collar stiffness (S) | 0.50 kN/mm |
| Characteristic pull-out | 0.40–0.75 kN by substrate row, γM = 2.0 |
| Minimum substrate thickness, spacing, edge distance | 100 mm each |
| Board thickness, new build | 140 mm; 160 mm with cutter (120/140 mm in aerated concrete) |
| Board thickness, old building with 20 mm plaster | 120 mm; 140 mm with cutter (100/120 mm in aerated concrete) |
| European Technical Assessment | ETA-16/0509 |
| Box quantity | 200 pcs |
Board thicknesses in that table already include a 10 mm adhesive layer, and the old-building rows add 20 mm of existing plaster on top of it — the sheet's own minimum-length rule is insulation plus sub-crusts plus anchorage depth, which is the arithmetic behind every row.
How to Install the 180 mm Plug Once the Boards Are Bonded
Mechanical fixing follows adhesive cure, and the plug goes in against a board that is already holding itself on the wall.
- Identify the substrate first and confirm it is at least 100 mm thick at the fixing position.
- Bond the boards and let the adhesive reach the cure time stated on its own data sheet.
- Drill a 10 mm hole to 40 mm in solid masonry, or 60 mm in aerated concrete, keeping the hole at least 10 mm deeper than the anchorage depth.
- Clear the hole with four back-and-forth passes of the bit at reduced speed.
- Push the body in until the collar faces flush against the board, positioning it where adhesive was applied behind the panel.
- Drive the pin home in one go, since a pin that is already driven does not take a second hit.
- For the immersed method, cut the recess with the plastic EPS cutter and cap it with a polystyrene disc before basecoating.
Fixing numbers come from the thermal insulation design, not from a habit. The manufacturer's minimum recommendation for polystyrene is 6 per m² in the field and 8 in corner zones up to 15 m from the ground, rising to 8 and 10 above 15 m, and the sheet states plainly that this does not replace the design. The fixing pattern and spacing method sets out the layout, and the plug length calculation for a given board works the length back from board depth, sub-crusts and embedment.
Drill Reach and Hole Geometry at This Length
On a 140 mm board the hole runs 190 mm from board face to bottom: 140 mm board + 10 mm adhesive + 40 mm masonry. An SDS bit needs that much working flute plus chuck clearance, so a bit chosen for 100 mm boards will be fighting the last few millimetres rather than cutting them.
Perpendicularity is worth a glance every third hole at this depth. A 2° drift across the 180 mm shank moves the expansion zone roughly 6 mm sideways (180 × tan 2° = 6.3 mm), which is enough to land it in a mortar joint instead of the brick face. Full substrate assessment and drive technique are covered in the step-by-step guide to installing insulation fixings.
Comparing the 160 mm, 180 mm and 200 mm Lengths
The LTX-10 family runs ten codes from 70 mm to 260 mm on one body, collar, pin and assessment; only the sleeve changes. Renders World stocks nine of them, and the three below sit next to each other on the shelf.
| Length | Board reach | Choose when |
|---|---|---|
| LTX 160 mm plug, 200 per box | 120 mm new-build · 100 mm over plaster | Boards at 120 mm on sound masonry |
| LTX 180 mm plug (this product) | 140 mm new-build · 120 mm over plaster | Boards at 140 mm, or 120 mm on a plastered wall |
| LTX 200 mm plug, 200 per box | 160 mm new-build · 140 mm over plaster | Deep retrofit, or 140 mm boards over old plaster |
Choosing the Length for Your Board Thickness
- 140 mm boards on clean new-build masonry: this is the matched length, surface-mounted, with the recess and cap option available where the immersed figure of 0.000 W/K matters.
- 120 mm boards on a wall carrying 20 mm of old plaster: also this length, because the plaster consumes the reach that a shorter plug would have used.
- 140 mm boards over old plaster, or 160 mm boards on new-build: step up to the 200 mm plug in the table above rather than relying on a cutter to make up the difference.
- Mineral wool rather than polystyrene: this fastener is assessed for EPS and XPS boards, so a wool build-up is a different fixing question and belongs with the wider fixing range.
Ordering runs on whole boxes. Renders World listed this box at £30.00 per 200 pieces when the page was read in August 2026, and showed it in stock; at 200 plugs that is £0.15 each, or about £0.90 per m² of wall at the field density of six. Pair the length with graphite EPS insulation boards at 140 mm and the plug question is settled on the same order.
FAQ — Reach, Substrates and Box Quantities
How many boxes does a 100 m² elevation take?
One LTX 180mm polystyrene fixing plug 200pcs box covers 25–33 m² at the manufacturer's minimum densities: 200 ÷ 6 per m² = 33.3 m², and 200 ÷ 8 per m² = 25 m². Across 100 m², that is 100 ÷ 33.3 = 3.0 boxes at field density and 100 ÷ 25 = 4.0 at corner density, so four boxes covers a typical elevation with the corner zones included. The project's thermal insulation design gives the exact count.
Does the reach change on a wall that still has old plaster?
Yes — the sheet treats 10 mm of adhesive plus 20 mm of plaster as sub-crusts, which brings the surface-mounted figure down from 140 mm to 120 mm of board. With the plastic cutter and an immersed head, 140 mm becomes workable again on that build-up.
Which length suits a 150 mm board?
The selection table has no 150 mm row: 180 mm is documented to 140 mm on new-build masonry and 200 mm to 160 mm, so the 200 mm plug is the sourced answer for a 150 mm board and leaves reach in hand rather than borrowing it from a cutter.
Which substrates want rotation-only drilling?
Hollow bricks, vertically perforated units and aerated concrete all keep their internal webs intact when drilled without impact, and that is what preserves the assessed pull-out on those rows. Solid concrete and solid brick take impact mode; every hole is cleared four times at reduced speed before the plug goes in.
Who decides how many fixings the wall needs?
The thermal insulation design does, against the wind loading for that building and exposure. Klimas publishes 6 and 8 per m², and 8 and 10 above 15 m, expressly as minimum recommendations that a design supersedes rather than as a specification in themselves.
Technical Documentation — LTX-10 Data Sheets
- Klimas LTX-10 Product Data Sheet (PDF) — technical parameters, substrate strength table and the full length selection table.
- Klimas LTX-10 catalogue sheet with installation data (PDF) — adds minimum substrate thickness, spacing and edge distance, and the cutter and disc accessory dimensions.