Description
Two of the four cells in this plug's row read 100 mm. On clean masonry it takes a 100 mm board surface-mounted; on a retrofit wall carrying 20 mm of old plaster it reaches that same 100 mm only with a cutter, and 80 mm without one — which is the whole decision on a 140 mm sleeve.
Which Board Thicknesses the 140 mm Plug Fits
The LTX 140mm polystyrene fixing plug 200pcs box anchors polystyrene boards up to 100 mm on clean masonry, or 80 mm on a plastered retrofit wall, at 30 mm effective embedment under ETA-16/0509. Each length in the insulation fixing accessories range owns its own band in the Klimas selection table, and the four cases below are the whole band for this one.
| Wall and mounting method | Board thickness this plug takes |
|---|---|
| New build, surface mount | up to 100 mm (80 mm in aerated concrete) |
| New build, immersed with a cutter | up to 120 mm (100 mm in aerated concrete) |
| Retrofit over 20 mm old plaster, surface mount | up to 80 mm (60 mm in aerated concrete) |
| Retrofit over 20 mm old plaster, immersed with a cutter | up to 100 mm (80 mm in aerated concrete) |
Every row already carries a 10 mm adhesive layer, which is how Klimas builds the table, and the second figure in each cell is the aerated-concrete case. The useful consequence is that one box covers two quite different build-ups: 100 mm boards on bare brick or block, and 80 mm boards over existing plaster.
Why Specifiers Choose an All-Plastic Pin at This Length
- Point thermal transmittance of 0.001 W/K surface-mounted and 0.000 W/K immersed, so a pattern of several hundred fixings adds almost nothing to the wall's heat loss and the U-value calculation stays clean.
- 0.75 kN characteristic pull-out in concrete C20/25–C50/60 and in solid clay brick at density ≥ 2.00 kg/dm³ — the two strongest substrates in the assessment, and the two most common under UK render systems.
- Five substrate categories, A to E, under ETA-16/0509 to ETAG 014, from concrete and solid brick through hollow and perforated units and lightweight concrete blocks to autoclaved aerated concrete, all on one 10 mm bit.
- Polyethylene body with a glass-fibre reinforced polyamide pin, which keeps the pin rigid under hammer blows without running a metal path through the insulation.
- 200 pieces per box, the same pack Renders World stocks either side of this length, so an elevation running one thickness on the main walls and something thinner at the reveals still orders in one go.
LTX-10140 Technical Data From the Product Sheet
| Parameter | Value |
|---|---|
| Product code | LTX-10140, 10 x 140 mm |
| Plug diameter (dk) | 10 mm |
| Plate diameter (Dk) | 60 mm |
| Anchorage depth (heff) | 30 mm; 50 mm in aerated concrete |
| Drilled hole depth (h0) | 40 mm; 60 mm in aerated concrete |
| Washer stiffness (S) | 0.50 kN/mm |
| Point thermal transmittance (χ) | 0.001 W/K surface, 0.000 W/K immersed |
| Body / pin material | PE / PA + GF |
| Pull-out, concrete C12/15 | 0.50 kN |
| Pull-out, concrete C20/25–C50/60 | 0.75 kN |
| Pull-out, solid clay brick | 0.75 kN |
| Pull-out, calcium silica solid brick | 0.60 kN |
| Pull-out, calcium silicate hollow blocks | 0.60 kN |
| Pull-out, perforated brick | 0.60 kN |
| Pull-out, Porotherm 25 | 0.40 kN |
| Pull-out, lightweight concrete blocks | 0.60 kN |
| Pull-out, aerated concrete AAC2 / AAC7 | 0.50 kN / 0.60 kN |
| Partial safety factor (γM) | 2.0, in absence of regulations |
| Assessment | ETA-16/0509 |
| Pack quantity | 200 pcs |
Two of those numbers work together on site. The 0.75 kN is a characteristic value, and the sheet applies γM = 2.0 where no national regulation says otherwise — so a design resistance is half the headline figure, and the plug count belongs to the building's own insulation design rather than to the strongest cell in the table.
How to Install the 140 mm Plug: Drill, Sleeve, Pin
Identify the substrate first, because both the drilling mode and the anchorage depth follow from it. Boards go up on adhesive, and the plug is a supplementary mechanical fixing whose stated job is transferring wind suction loads into the structure behind.
- Match the bit to the plug: 10 mm diameter, and in solid materials a hole at least 10 mm deeper than the 30 mm anchorage.
- Clear the hole properly: a back-and-forth stroke of the drill at reduced speed, repeated four times, which lifts the drillings that would otherwise sit under the expansion zone.
- Drop impact mode on hollow and aerated units: hammering breaks the inner walls of the substrate, and the pull-out resistance goes with them.
- Seat the washer flush: the sheet asks for the fastener body to be embedded so the washer is faced with the insulation — worth noting, because a head left standing proud is a habit the document does not support.
- Fix where the adhesive is, matching the installation spot to an adhesive contact area on the board, then drive the pin in firm even blows. A pin already driven is never struck again — that is how they break.
Immersed Mount, and What It Buys
Recessing the head lifts new-build capacity from 100 mm to 120 mm, takes the plastered-retrofit case from 80 mm to 100 mm, and drops χ to 0.000 W/K. Klimas names the two parts for it — a WK-FT plastic cutter for the hole and a KS or KSG polystyrene disc to cover the spot — and their stocked equivalents sit in the wider insulation fixing accessories collection rather than on this page.
How to Check This Length Against Your Build-Up
Klimas gives a formula rather than a lookup, and it settles any board thickness in one line: Ld = tfix + ttol + heff, where ttol is the adhesive plus any existing plaster and heff is the anchorage depth.
- 100 mm board, new build: 100 + 10 + 30 = 140 mm, which is this box.
- 80 mm board, plastered retrofit: 80 + (10 + 20) + 30 = 140 mm, the same box on a very different wall.
- 100 mm board, plastered retrofit: 100 + 30 + 30 = 160 mm surface-mounted, or this length with a cutter.
For the layout that sits on top of the length decision, the fixing pattern and spacing method works through field and corner zones, and the plug length calculation walkthrough runs this formula against other board schedules. Full-elevation sequencing sits in the EWI fixings installation guide.
Choosing Between the 120, 140 and 160 mm Lengths
Klimas publishes the LTX-10 in ten lengths from 70 mm to 260 mm. Body, plate, pin material and assessment are common to all of them — only the sleeve changes, so the choice is arithmetic rather than performance, and Renders World stocks the range in one pack size to keep it that way.
| Length | New-build board | Retrofit board, 20 mm plaster | Pick it when |
|---|---|---|---|
| LTX 120 mm, one step shorter | 80 mm | 60 mm | 80 mm boards on bare masonry |
| LTX 140 mm (this box) | 100 mm | 80 mm | 100 mm new build, 80 mm over plaster |
| LTX 160 mm, one step longer | 120 mm | 100 mm | 100 mm boards over plaster, deeper retrofit |
| LTX 70 mm, shortest | 30 mm | 10 mm | Reveals and junction detail boards |
One detail worth carrying into a price comparison: the box holds 200 pieces up to the 200 mm length and 100 pieces at 220 mm and above, so a per-plug figure is the only fair way to compare across that break.
How Many Boxes to Order for an Elevation
The sheet's recommended density for polystyrene is 6 plugs/m² in the middle area and 8/m² in corner areas up to 15 m above ground, rising to 8 and 10/m² above 15 m — offered explicitly as a recommendation that does not replace the thermal insulation design.
- Box coverage: 200 pcs ÷ 6/m² = 33.3 m²; 200 pcs ÷ 8/m² = 25 m². One box covers 25–33 m² depending on zone.
- Per 100 m² of wall: 100 m² × 6–8/m² = 600–800 plugs; ÷ 200 per box = 3–4 boxes, before any allowance for misdrilled holes.
- Above 15 m: 100 m² × 8–10/m² = 800–1,000 plugs, so 4–5 boxes for the same area.
Current pricing and stock for this box sit on the live product listing rather than in this description, and the neighbouring lengths at Renders World share the same 200-piece pack, which keeps a mixed-thickness order arithmetically simple.
Is the 140 mm Length Right for Your Wall?
- 100 mm boards on bare brick or block: this is the matched length, surface-mounted at full 30 mm anchorage on any of the five substrate categories. Graphite-enhanced EPS insulation boards are stocked in that thickness.
- 80 mm boards over 20 mm of existing plaster: this length again, surface-mounted. Plaster is rarely a flat 20 mm across an elevation, so measure it in a few places before committing a pallet.
- 100 mm boards over plaster: either immerse-mount this box with a cutter, or step up to the 160 mm length and keep surface mounting.
- 80 mm boards on clean masonry: the 120 mm length is the matched box there, on the same bit and the same cycle.
- Plinth and below-DPC zones: the sheet's stated application covers EPS and XPS polystyrene, so plinth and below-DPC XPS boards sit inside its scope — confirm the schedule with the system holder for anything below ground level.
LTX 140 mm Plug FAQ: Quantities, Substrates, Limits
How many boxes cover 100 m² of wall?
Three to four below 15 m. At the sheet's recommended 6–8 plugs/m², 100 m² needs 600–800 plugs and each box holds 200, with corner and edge areas carrying the higher density. Above 15 m the recommendation rises to 8–10/m², which is 800–1,000 plugs, or four to five boxes. The final count belongs to the thermal insulation design, which the recommendation explicitly does not replace.
Why this length rather than the 160 mm for a 100 mm board?
Because the plaster decides it. On bare masonry with a 10 mm adhesive bed, 100 + 10 + 30 comes to 140 mm and this is the matched box. Add 20 mm of old plaster and the same board needs 160 mm surface-mounted, or this length installed with a cutter — the 160 mm plug is the simpler route when the whole elevation is plastered.
Which substrates does it hold in, and how well?
All five categories in ETA-16/0509. Characteristic pull-out runs from 0.75 kN in concrete C20/25 and solid clay brick, through 0.60 kN in calcium silica solid brick, calcium silicate hollow blocks, perforated brick, lightweight concrete blocks and AAC7, down to 0.50 kN in AAC2 and 0.40 kN in Porotherm 25. Apply the sheet's γM of 2.0 to reach a design value.
What changes on aerated concrete?
Two things get deeper and one gets thinner. Anchorage rises to 50 mm and the hole to 60 mm, while the board this length supports drops to 80 mm on new build or 60 mm over plaster. Drilling stays in rotation-only mode, which keeps the cell structure that carries the load.
Does it suit mineral wool slabs?
The sheet specifies it for EPS and XPS polystyrene, so wool sits outside its stated application. Mineral wool insulation is fixed with anchors assessed for that material, usually with a wider load-spreading plate to suit the lower slab strength.
Technical Documentation