Description
Part L compliance starts with insulation thickness, and 150 mm boards are where most current new-build and deep-retrofit specifications land. The LTX 180 mm is the plug length that finishes the job — reaching through the full board depth, through the adhesive, and 30 mm into the masonry without compromise. At 180 mm overall with a 10 mm diameter sleeve and 60 mm flange, it is the all-plastic anchor for the thickness band where U-value targets are actually met.
What the LTX 180 mm Plug Does in a UK EWI System
Compliance-grade U-value performance starts with the right fixing length, and the Klimas LTX 180 mm polystyrene plug delivers it: 10 mm sleeve, 60 mm flange, 30 mm anchorage into masonry, certified under ETA-16/0509 (ETAG 014) for fixing 140–150 mm insulation boards on new-build walls in UK external wall insulation systems. Supplied in boxes of 200 from the insulation fixing accessories range, it is the plug specified on projects where Part L targets and deep-retrofit thermal goals shape the build-up.
The all-plastic construction — polyethylene body, glass-fibre-reinforced polyamide pin — eliminates the steel pathway that conventional metal-pin fixings carry from masonry to render. Each plug delivers a point thermal transmittance of 0.001 W/K at surface mount and a true 0.000 W/K when recessed and capped.
At 150 mm insulation thickness, that performance margin matters more than it does at 80 mm or 100 mm. The thermal investment per square metre is larger, the U-value target is tighter, and every fixing-point bridge that gets engineered out preserves the calculated performance of the build-up the architect signed off.
What Makes the LTX 180 mm Plug Worth Specifying
- Matched to Part L Compliance Insulation Thicknesses: The 180 mm length aligns with 140–150 mm boards — the depth band that typically meets or approaches current Part L U-value targets on solid-wall and cavity-fill build-ups. The exact performance depends on the project's wall construction and thermal calculation, but this is the fixing length where compliance-grade specifications start.
- True Zero Thermal Bridge When Immersed: 0.000 W/K per fixing at immersed mount keeps the full thermal value of 150 mm insulation intact across the elevation. On thick builds, surface-mounted alternatives quietly erode the calculated U-value at every fixing point.
- Deep-Retrofit Reach Over Existing Plaster: On retrofit walls carrying 20 mm of existing plaster beneath the adhesive, the 180 mm plug accommodates 120 mm boards at surface mount and 140 mm boards when immersed — covering whole-house retrofit programmes targeting EPC band A or B.
- Pin Stiffness Engineered for 180 mm Drives: Glass-fibre reinforcement in the polyamide pin holds rigidity through deep hammer drives, preventing the mid-shaft buckling that can occur in less robust plug designs at this length.
- 60 mm Flange With Adhesive-Key Pockets: The oversized pressure plate keys mechanically into basecoat mortar through moulded pockets, eliminating the fixing-point ghosting that can show through thin-coat render on dark-coloured or sun-loaded elevations.
- ETA-16/0509 Across the Full UK Substrate Range: European Technical Assessment under ETAG 014 covers concrete from C12/15, solid clay and calcium silicate brick, perforated brick including Porotherm 25, lightweight aggregate block, and autoclaved aerated concrete — every masonry substrate found in UK housing stock.
Technical Specifications — LTX 180 mm Data Sheet Highlights
| Parameter | Value |
|---|---|
| Product Code | LTX-10180 |
| Plug Diameter (dk) | 10 mm |
| Overall Length (Lk) | 180 mm |
| Flange Diameter (Dk) | 60 mm |
| Anchorage Depth (heff) | 30 mm · 50 mm for aerated concrete |
| Drill Hole Depth (h0) | 40 mm · 60 mm for aerated concrete |
| Body Material | Polyethylene (PE) |
| Pin Material | Polyamide reinforced with glass fibre (PA + GF) |
| Washer Stiffness | 0.50 kN/mm |
| Thermal Transmittance (χ) — surface mount | 0.001 W/K |
| Thermal Transmittance (χ) — immersed mount | 0.000 W/K |
| Characteristic Pull-Out — Concrete C20/25 | 0.75 kN |
| Characteristic Pull-Out — Solid Brick | 0.75 kN |
| Characteristic Pull-Out — Perforated Brick | 0.60 kN |
| Characteristic Pull-Out — Porotherm 25 | 0.60 kN |
| Characteristic Pull-Out — Lightweight Aggregate Block | 0.40 kN |
| Certification | ETA-16/0509 (ETAG 014) |
| Pack Quantity | 200 pcs |
How the LTX 180 mm Plug Installs in a Render or EWI System
The LTX 180 mm enters the ETICS build-up after the insulation board has been adhesive-bonded to the substrate and the adhesive has cured for the manufacturer-specified open time — typically 24 hours on EPS at +20 °C. A 10 mm hole is drilled through the board and 40 mm into the masonry, the plug body is inserted until the flange sits flush against the board face, and the expansion pin is driven home with a steady hammer rhythm until the head seals against the sleeve collar. Basecoat with embedded fibreglass mesh then covers the flange and unifies the surface — the foundation on which the render finish achieves its rated thermal and weatherproofing performance.
Fixing density across the elevation is governed by the project wind-load calculation: typically 6 plugs per square metre in central zones, rising to 8 at corners and edges and 10 on exposed elevations above 15 metres. The fixing pattern and spacing calculation guide sets out the layout method aligned with ETAG 014 wind-load categories, and the step-by-step installation guide for insulation fixings walks through substrate assessment, drill-mode selection, and pin-drive technique in detail.
Installation Notes — Drill Bit Reach, Hole Geometry, Drive Discipline
Drill bit length is the first decision at this plug depth. A standard 210 mm SDS masonry bit reaches its working limit when drilling through 150 mm of EPS plus 40 mm of masonry — total reach 190 mm with no spare for chuck depth or operator clearance. For consistent hole geometry across an elevation, a 260 mm or 300 mm bit removes that constraint entirely and lets the operator drill at normal speed without forcing the last 5 mm of depth.
Drill mode follows the substrate. Impact mode on concrete and solid brick drives the bit cleanly. Rotation-only mode is essential on perforated brick, hollow block, and autoclaved aerated concrete — impact drilling collapses internal webs and reduces pull-out below certified values. Clear each hole with three to four back-and-forth passes at reduced drill speed before plug insertion.
For the best result on 150 mm specifications, use a depth stop set to 40 mm (60 mm on aerated concrete) and check drill perpendicularity every third hole. At 180 mm overall length, a 2° angular drift at the surface produces roughly 6 mm of lateral offset at the expansion zone — enough to move the anchorage into a mortar joint rather than the brick face. Immersed mounting with an EPS countersinking cutter and grey EPS finishing caps achieves 0.000 W/K per fixing and removes any visual trace from the rendered surface.
What UK Installers Do Differently With the LTX 180 mm Plug
- Run 300 mm masonry bits exclusively at this depth: Dedicate two or three 300 mm SDS bits to 180 mm and 200 mm plug work and keep the 210 mm bits for shorter plugs. The longer bit length transforms drilling rhythm and eliminates the cramped final inches that wear bits unevenly.
- Default to immersed mounting on every elevation: At 140–150 mm insulation thickness, the thermal payback on a properly insulated wall is substantial. Surface-mounted fixings cost a measurable fraction of that calculated performance at every plug point; the countersinking step takes seconds per fixing and preserves the U-value the project paid to achieve.
- Verify lightweight aggregate substrates against the wind-load calc: The 0.40 kN characteristic pull-out on LAC blocks suits standard domestic wind zones but warrants confirmation on exposed coastal or upland sites. Rotation-only drilling is non-negotiable on these substrates.
- Stage delivery for compliance-grade projects: A four-house terrace at 150 mm insulation runs to 1,800–2,800 plugs, comfortably ten to fourteen boxes. Splitting delivery into two drops keeps the working area clear and reduces on-site storage exposure to weather.
- Mark the fixing grid after board placement: Snap a chalk line grid on the bonded boards before drilling rather than transferring marks from board to board during installation. The single-pass grid maintains pattern consistency on long elevations where small cumulative drift becomes visible in finished render.
Is the LTX 180 mm Plug Right for Your Project?
- Choose the LTX 180 mm if you are fixing 140–150 mm EPS or XPS boards on new-build masonry, or 120–140 mm boards on retrofit walls with up to 20 mm of existing plaster — the Part L compliance and deep-retrofit thickness band.
- Stepping down to enhanced domestic specifications? The LTX 160 mm plug at 200 pcs per box is the precise length match for 120–130 mm boards on housing association upgrades and improved-EPC schemes.
- Stepping up to deep renovation or near-Passive House builds? The LTX 200 mm plug at 200 pcs per box reaches 160 mm boards on new-build substrates and 140 mm boards over retrofit plaster.
- Specifying mineral wool for fire-rated or high-rise façades? Higher-density mineral wool and fire-strategy requirements typically call for metal-pin fixings with greater pull-out capacity; the broader mechanical fixings range includes heavy-duty variants for those specifications.
FAQ — LTX 180 mm Coverage, Substrates, Ordering
Does the 180 mm plug fully cover 150 mm boards on new-build walls?
With surface mounting on a new-build substrate carrying a 10 mm adhesive layer, the 180 mm plug accommodates boards up to 140 mm thick. For 150 mm boards, immersed mounting extends the effective range to 160 mm, which comfortably covers the 150 mm thickness and delivers 0.000 W/K per fixing. If surface mounting is preferred for installation speed, the 200 mm plug provides the additional length needed for 150 mm boards without requiring a countersinking cutter.
What is the pull-out performance on lightweight aggregate blocks?
The LTX 180 mm achieves a characteristic pull-out of 0.40 kN on lightweight aggregate (LAC) blocks, compared with 0.75 kN on concrete C20/25 and solid brick. The 0.40 kN value meets the design requirements for standard domestic EPS insulation under typical UK wind-load conditions. Projects on LAC substrates in exposed coastal or upland zones should confirm pull-out against the project-specific wind-load calculation. Rotation-only drilling preserves the block's aggregate structure and maintains the certified performance.
How many boxes do I need for a terraced row upgraded to 150 mm insulation?
A four-house mid-terrace row typically presents 300–400 m² of external wall area. At 6 fixings per square metre in central zones and 8 per square metre at corners and edges (rising to 10 above 15 metres), total requirement falls between 1,800 and 2,800 fixings. Ten to fourteen boxes of 200 cover that range. Ordering an additional box or two as reserve is sensible at this scale, since returning unused sealed packs is straightforward and a mid-project reorder pause is more costly than the small carrying inventory.
Can I install the 180 mm plug with a standard 210 mm SDS bit?
A 210 mm bit reaches its practical working limit at this plug length once total drilling depth approaches 190 mm (150 mm insulation plus 40 mm masonry). The bit is technically long enough, but operator clearance and chuck depth eat into the available length and slow the drilling rhythm noticeably. A 260 mm or 300 mm bit restores normal drilling speed and produces more consistent hole geometry across an elevation.
Can the LTX range support whole-life carbon assessments?
The polyethylene body and polyamide pin are recyclable thermoplastics, and the cardboard outer packaging enters standard paper and card recycling streams. The all-plastic construction carries lower embodied carbon per fixing than steel-pin alternatives, which supports the embodied-carbon line of any whole-life carbon assessment, PAS 2035 retrofit report, or EPC+ framework tracking material impact across the building envelope. The relevance grows at the Part L compliance scale, where fixing counts per project run into the thousands.
What ambient conditions does the plug install in?
The polyamide pin retains its drive characteristics across UK site temperatures, from cool winter mornings down to around +5 °C through to summer heat above 25 °C. As with all ETICS fixings, the underlying adhesive must have reached the manufacturer-specified cure time before mechanical fixing begins — most commonly 24 hours on EPS at +20 °C, extended in colder conditions. Avoid driving plugs into substrates that are visibly frosted or saturated.
Technical Documentation — LTX-10 TDS and Anchorage Reference
- Klimas LTX-10 Product Data Sheet (PDF) — covers all LTX-10 length variants including the 180 mm anchor.