Description
Two listings share the 163 mm channel on this shelf, and only one of them puts its metal and its gauge on the label. That is the difference a buyer can verify today, alongside a live price and a vendor whose own range description leaves the drip flange as a specify-at-order item. Both profiles sit on the insulation fixing accessories shelf, and this audit publishes only what the name, the live listing and that vendor page actually carry.
Where the 163 mm Aluminium Starter Profile Does Its Work
The base track 163mm 2.5m aluminium is the starter rail on this shelf that names both metal and 1 mm gauge, at £14.90 per 2.5 m length in August 2026, setting the datum a deep build-up inherits. Everything above the base course follows that one line, which is why the profile is chosen before the boards are ordered rather than after.
The named gauge and the named metal are what this listing offers over its neighbour at the same width. Renders World holds both, so the choice is made on the order line rather than on availability.
- The drawing names a starter-rail thickness — this is the 163 mm member whose name declares one, so the order matches the specification without a substitution note against it.
- The drawing names a metal — aluminium sits in the product name here, where the standard 163 mm listing names no material at all.
- A deep build-up is already fixed at this width — channel width and the 2.5 m module are identical across the pair, so the setting out, the take-off and the corner cuts are unchanged by the choice.
Why Buyers Order the Member That Names Its Metal and Gauge
The reasons are commercial and documentary. A profile that carries its own description on the label saves a phone call at specification stage, and the premium for it is small against a full base line.
- Metal and gauge in the product name — aluminium and 1 mm both appear on the label, which is what a specifier checking a starter rail needs to read before approving the order.
- £14.90 against £11.40 per 2.5 m length — £3.50 a length, about 31% more than the 163 mm listing that names neither, on August 2026 figures.
- £5.96 per linear metre of base line — £14.90 ÷ 2.5 m, materials only, which makes the gauge decision easy to price against a measured perimeter.
- Declared despatch weight 3 kg per length — against 2 kg for the standard listing at the same width, so a delivery of twelve lengths lands 12 kg heavier and handling is planned accordingly.
- Held as a pair, not a substitution — both 163 mm profiles are listed, so a specification naming a gauge is answered from stock rather than by derogation.
Specification: What the Name Carries and What Needs the Vendor
No manufacturer sheet covering this length was retrieved this session, so the table separates what the label and the live listing declare from what only the vendor can settle. Nothing here is filled in from a comparable profile.
| Property | Value | What it rests on |
|---|---|---|
| Channel width | 163 mm | Product name |
| Length per piece | 2.5 m | Product name |
| Section gauge | 1 mm | Product name |
| Material | Aluminium, as named | Product name; no alloy or temper designation published |
| Price per length | £14.90, August 2026 | Live product record |
| Declared despatch weight | 3 kg per 2.5 m length | Live product record; fulfilment weight, not a section mass |
| Finish | Not published | Vendor range page describes mill finish as the normal supply for the family, with colour to order |
| Drip flange | Not published | An option in the vendor's box base range, so confirmed at order |
| Ventilation apertures | Not published | No document for this profile mentions perforation |
| Board thickness the channel seats | Not published | Needs a manufacturer channel table; none exists for this listing |
| Fixing centres and drill diameter | Not published | Vendor instructions or the system designer |
| Reaction to fire | Not published | A class belongs to a tested product or assembly, never to a profile name |
Two of those rows are worth acting on. The drip flange is described as a build option in the vendor's own range page rather than as standard, so it is specified on the order if the detail depends on it.
The other is the channel fit, which the next section resolves with an off-cut rather than with a number this page cannot source.
The Two 163 mm Profiles Side by Side
The comparison runs on what each label declares and what each costs, because the channel width and the module are identical.
| Listing | What the name declares | Price and declared weight |
|---|---|---|
| 163 mm × 1 mm aluminium (this product) | 163 mm channel, 2.5 m, 1 mm gauge, aluminium | £14.90 per length, 3 kg |
| 163 mm profile naming neither metal nor gauge | 163 mm channel, 2.5 m only | £11.40 per length, 2 kg |
The declared weights are the one measurable difference on file: 3 kg against 2 kg per length is 50% more as despatched, which is packaging data and not a section mass, so it indicates a heavier profile without quantifying its stiffness.
Where a specification is silent on gauge and metal, the lighter listing covers the same 163 mm channel for £1.40 less per linear metre. Where either is named, this is the member that answers it.
Fitting the Profile and Checking the Channel on Site
Method carries this section, since the fixing schedule belongs to the vendor's instructions and to the wind-load assessment for the site. The sequence holds whatever those documents turn out to say.
- Set one datum and project it. Establish the base line above the DPC with a laser, carry it to every elevation from that single reference, and snap a chalk line so the height survives until boarding starts.
- Confirm the channel against the real board. The vendor's range page describes its box base family as sized so the track width matches the insulation width, while this shelf pairs the 163 mm channel with thinner boards, so an off-cut with its adhesive bed allowed for settles the fit before the first course is bonded.
- Dry-run the lengths before drilling. Laid along the chalk line they show a fixing point landing on a movement joint or a service while it is still a pencil mark.
- Take the fixing schedule from the documents that own it. Drill diameter, plug type and centres come from the vendor's instructions or the system designer, confirmed on the first length rather than carried from the last job.
- Cut and deburr for the gauge named. A 1 mm aluminium section cuts cleanly with a fine-tooth metal disc, and running a flat file across each fresh edge protects boards, mesh and hands on the way past.
The first-day base track and datum method covers levelling in full, the EWI fixings installation sequence picks the elevation up from the first bonded course, and the fixing pattern and spacing method turns a wind zone and a building height into a real count.
Order Quantities and What the Aluminium Profile Costs per Metre
Measure the base line, divide by the 2.5 m module and round up. Taking a 30 m perimeter as the worked example, 30 ÷ 2.5 = 12 lengths, and 12 × £14.90 = £178.80 in profile, materials only, at the August 2026 price.
Carry a spare length where external corners are mitred, and keep labour outside that figure — material and installed cost are never one number.
- Order line and quantity — the line reads base track 163mm 2.5m aluminium, one length per 2.5 m of measured run plus a corner allowance, and the listing shows as available with stock not tracked on this variant, so quantity is confirmed at order for a large run.
- Where gauge and metal are not specified — the 163 mm profile without a named gauge takes the same channel at £11.40 a length.
- Put the boards on the same delivery — the graphite EPS insulation boards shelf publishes the thickness ladder the base course is chosen from, with the channel fit confirmed by off-cut.
- Where stone wool is specified — the vendor describes this box base family as particularly suited to mineral fibre systems, and Renders World stocks the slabs on the mineral wool insulation range, where each slab's declared class comes from its own declaration of performance.
Questions Buyers Ask Before Ordering the 163 mm Aluminium Profile
How many lengths does a deep base line need, and what does it cost?
Divide the measured run by the 2.5 m module, round up, then add a length for mitre waste. A 30 m perimeter comes to twelve lengths and £178.80 on the August 2026 price, materials only, with boards, adhesive, fixings and labour costed separately.
What separates this from the other 163 mm listing?
The label. This one names aluminium and a 1 mm gauge; the other names neither, and no gauge figure is published for it. Both declare a 163 mm channel and a 2.5 m length, and the declared despatch weights differ by 1 kg per length.
Does the 163 mm channel take mineral wool as well as rigid boards?
Geometrically the channel seats any rigid board or slab that fits it, and the vendor describes this family as well suited to mineral fibre systems. What does not transfer is the fastener schedule, which is specified by the system designer for a wool build-up, and the plug length calculation method sets out how the substrate side is derived.
What should be confirmed with the vendor before cutting?
Three things settle on the first length: whether the drip flange is included on the profile supplied, since the range treats it as an option; the finish, as mill is described only as the normal supply; and the fixing centres and drill diameter for the substrate in question. Asking at order keeps all three off the critical path.