Description
Starter profiles are bought on channel width, and this is the narrowest of them — a 23 mm channel in 2.5 m lengths, the bottom rung of the standard ladder that runs to 163 mm inside the insulation fixing accessories range at Renders World. As a thin starter track for EWI build-ups, every figure below is either read from the live listing this month or flagged as a detail to settle at order.
Where the 23 mm Starter Profile Sits in an EWI Build-Up
Priced at £5.50 per 2.5 m length in August 2026, the base track 23mm 2.5m carries the first course of insulation and holds the datum every board above it inherits.
That datum is the profile's real job. Adhesive, board, reinforced basecoat and render all reference the height and projection set on the first morning, so the sequence is worth planning before a single board is bonded.
- First fixed component in the wall, ahead of adhesive and boards — the layer order is set out in the guide to how EWI system layers stack.
- Datum and levelling belong to day one; the first-day base track set-up routine covers the spirit level and datum line method.
- Above the damp-proof course, with the plinth zone below usually taking water-resistant XPS foundation boards instead.
Starter Track Specification, and What to Confirm When You Order
Two dimensions are certain because they are the product's own name, and the commercial figures were read from the listing this session. The rest is left open rather than filled in from a neighbouring product's sheet.
| Item | Value |
|---|---|
| Channel width | 23 mm |
| Length | 2.5 m per piece |
| Price | £5.50 per 2.5 m length, August 2026 |
| Price per linear metre | £2.20 (£5.50 ÷ 2.5 m) |
| Listed shipping weight | 2 kg per length |
| Availability | In stock at the August 2026 fetch |
| Material and sheet gauge | Confirmed at order |
| Board depth compatibility | Confirmed at order |
| Drip detail and mesh carrier | Confirmed at order |
| Fixing centres and movement gap | From the system specification |
Those blanks are a purchasing instruction rather than an omission. The manufacturer's published technical table for its plinth starter profile, product code AC, runs from 33 mm to 203 mm and carries no 23 mm row, so nothing on that table has scope over this width — one call to confirm the two lines you need is time well spent on a first order.
For the widths the table does cover, the manufacturer states 20 lengths per carton to 153 mm and 10 per carton at 163 mm and above. That helps when pricing a mixed order, and it is stated here only for those documented widths.
Why Installers Choose the Narrowest Starter Track
The narrow channel earns its place for reasons that have little to do with headline specification and a great deal to do with how a day on site runs.
- Lowest unit cost in the ladder at £5.50, or £2.20 per linear metre — the cheapest way to hold a true datum where board depth is small.
- Two kilogrammes per length: 25 kg ÷ 2 kg = 12.5, so twelve lengths at 24 kg stay inside the small-parcel band instead of triggering a pallet.
- One datum across several widths — run this profile and a wider one to the same projected line and the elevation reads as a single system.
- Sits under either insulation family, graphite EPS insulation boards or slab-format mineral wool insulation, with board depth taken from the system specification rather than the profile name.
- Short 2.5 m pieces cut and handle single-handed, and they stack in a van without the bowing longer profiles pick up.
How to Fit the Starter Track to a True Datum
Fitting is a levelling exercise first and a fixing exercise second. Establish the line, fix to it, then check the run before adhesive reaches the wall.
- Project one datum across the whole elevation. A laser line carried end to end holds straighter than a chalk line transferred piece by piece, and it clears the accumulated transfer error before the last opening.
- Set out and pre-drill to the centres in your system specification. Centres, fixing type and embedment are system figures — the fixing pattern and spacing method shows how the layout is worked out.
- Fix into the structural substrate. On retrofit walls carrying old render, the fixing must reach the masonry behind; the installation guide for insulation fixings covers substrate assessment.
- Leave the movement gap your system states at butt joints, so seasonal movement in the metal stays out of the basecoat above.
- Deburr every cut with a flat file, and a snipped end will not score the back of a board during seating.
Tolerance and Sequence Notes
Check the finished run with a level over its full length, and hold this profile to the same projected height as any wider profile on the elevation — a step between the two shows in raking light once render is on, and correcting it at track stage costs minutes rather than a re-skim.
Choosing Between the Starter Track Widths
The standard tracks vary on one dimension only, and the decision is which width matches the board depth specified at that point on the wall. Renders World stocks the ladder end to end, so a mixed-thickness elevation runs from one supplier and one datum.
| Profile | Channel width | Position in the range |
|---|---|---|
| 23 mm starter track (this page) | 23 mm | Narrowest stocked |
| 33 mm starter track | 33 mm | One step up |
| 53 mm starter track | 53 mm | Entry width for main-wall courses |
| 93 mm starter track | 93 mm | Mid-range main-wall width |
| 163 mm starter track | 163 mm | Widest in the standard ladder |
Is This the Right Width for Your Detail?
- Take the 23 mm profile where the specified board depth at that point is the thinnest on the job.
- Step up to 33 mm as soon as the depth exceeds what the narrow channel holds; only the width changes.
- Go to 53 mm or wider for main-wall courses, both profiles set to one datum.
- Deciding on gauge or material rather than width? Heavier-gauge profiles sit alongside the standard ladder in the collection, and this width's material is confirmed at order.
Ordering, Delivery and Site Handling
A single length of base track 23mm 2.5m weighs 2 kg on the listing, which keeps small quantities in the parcel network. Renders World confirms carriage after the order is placed, because weight and dimensions vary too widely across the catalogue for an automatic quote.
- Small parcels to 25 kg travel next day; pallets to 1,200 kg go next day, or two business days on the economy option.
- Free local delivery over £300 within 15 miles of the Southampton base, then £1.50 per additional mile to a 60-mile limit.
- Deliveries are kerbside, between 8:00 and 17:00, so arrange handling from the roadside.
- Same-day processing where stock is available, with restocking times advised if it is not.
Stock showed as available at the August 2026 fetch. For a mixed order, the whole ladder sits with the base tracks, plugs and anchors in one place.
Base Track Questions from UK Sites
How many 2.5 m lengths should I order?
Measure the run and divide by 2.5 m, then add a length for cuts. On an assumed figure: eight junctions at an assumed 1.5 m each gives 8 × 1.5 = 12 m, and 12 m ÷ 2.5 m = 4.8, so five lengths plus one spare. Take the real run off the elevation drawing.
Which board depth does the 23 mm channel take?
The width in the name is the channel dimension, not a board thickness, and the manufacturer's published table for this profile family begins at 33 mm — so the depth this width holds comes from your system specification or from us at order. Matching channel to specified depth is the one check to make before committing a full elevation.
Can the narrow profile carry a main wall?
Main-wall courses run on the wider profiles from 53 mm upward, because the channel has to hold the depth the wall is designed around. The narrow track performs best where the specified depth is genuinely small, and running both to one datum keeps the elevation consistent.
How should profiles be stored before fitting?
Flat and under cover. Pallets arrive shrink-wrapped but not weatherproof and delivery is kerbside, so a dry space near the scaffold protects both the profile and the programme. Lengths stored flat stay straight, which matters more on a datum component than on anything else in the build-up.