Silicone Render Cost: A Full UK Breakdown

What does silicone render cost?

Here’s the figure most people come for, as an honest indicative range: silicone render typically costs around indicative £65–£95 per square metre for the render work, and a three-wall job such as a typical 3-bed semi commonly lands around indicative £8,000–£12,000 once scaffolding and standard preparation are included. That’s a wide band on purpose, because the real number depends heavily on your walls and access — two similar-looking houses can attract genuinely different quotes for sound reasons.

Treat these numbers as a sense-check to plan around, not a price you can hold anyone to. The aim of this guide is to show you what sits behind the range, so you can understand your own quotes rather than just react to them. If you’re looking at K-Rend specifically, our K-Rend cost guide covers that version of the same picture.

Silicone render cost per square metre

The square metre is the building block of most render quotes. The indicative rate for silicone covers the render system itself — base coat, mesh, primer, topcoat and the labour to apply them — on a sound wall with normal access. It usually doesn’t include scaffolding or removal of an old surface, which are priced separately. Here’s how silicone sits against the other common systems:

Ballpark ranges to help you plan, not fixed prices. Our guide to render cost per m2 explains how to measure your walls and why a rate alone rarely predicts a final price.

Silicone render cost by number of walls

Most homeowners think in whole-house terms, and the most reliable way to do that is by how many walls are being rendered. These indicative totals include scaffolding and standard preparation on sound walls; old render to remove or tricky access moves you toward the top of each band or beyond.

A terrace costs less partly because neighbours’ houses cover the side walls; a detached house has four exposed elevations and more scaffolding. Our guide to the cost to render a 3 bed semi walks through that case in detail, and single-storey homes have their own guide to the cost of rendering a bungalow.

A worked example: why small jobs cost more per m²

Here’s some illustrative arithmetic, not a quote. Take a mid-terrace with a front and rear wall each about 5 metres wide and 5.5 metres to the eaves — 55m² gross. Take off around 10m² for windows and doors and you have roughly 45m² to render. At indicative £65–£95 per m², the render work alone comes to about £2,900–£4,300.

Yet the two-wall band above is indicative £5,000–£8,000. The difference is everything that doesn’t scale with area: scaffolding front and back (often with the rear reached through the house or down an alley), protection, sills, removing and refitting fittings, waste and setting up. Those costs are similar whether the wall is large or small, which is why small jobs cost more per square metre — and why multiplying a rate by your wall area will usually undershoot a real quote.

What affects the price

This is the part that explains why quotes differ, and it’s rarely the render. The biggest factor is the condition of the existing wall: rendering over a sound, well-bonded surface is straightforward, but failing render or loose pebbledash has to come off first. After that come scaffolding and access, the amount of detailing around bays, porches, sills and features, any repairs to the wall underneath, and regional labour rates, which vary noticeably across the UK.

Notice what’s not top of that list: the brand of render. When one quote is hundreds or thousands more than another, the productive question is which of these variables explains it — not whether someone is using a fancier bag of render. The next few sections take the big ones in turn.

What the survey looks at before pricing

A reliable silicone render price comes from a survey, not a phone call, because most of the variables can only be judged on site. A good specialist will usually:

• Measure each elevation and deduct windows and doors, noting gables, bays and returns that add area or awkward work.
• Tap-test any existing render or dash for hollow, loose areas — the check that decides whether it can stay or must come off.
• Identify the wall underneath: brick, block, a mix, or a traditional wall that may need a different system altogether.
• Look for damp, cracking and movement that need fixing before any render goes on.
• Check sills, downpipes and fittings: whether sills project far enough once the wall is thicker, and what has to come off and go back.
• Assess access to every side for scaffolding, including neighbours’ land, conservatories and the pavement.
• Note exposure — which walls take driving rain or sit in shade — which can shape detailing advice.

Each of those lines turns into a cost, which is why a quote given without a visit is a guess. If a quote arrives without anyone having looked closely at your walls, treat it with caution; if it arrives with notes on each of these points, you’re dealing with someone who has priced the real job.

The big variable: removing old render

If one line swings a silicone render quote, it’s whether the old surface stays or goes. Where existing render is sound and firmly bonded, it may be prepared and rendered over at the standard rate. Where it’s loose, hollow or cracked, it has to come off — slow, noisy work that produces a lot of heavy waste — and the job is priced as a strip and re-render at around indicative £100–£170 per m² all-in — the same band that applies where pebbledash is rendered over rather than removed. On the 45m² terrace above, that’s roughly £4,500–£7,650 before you consider anything else.

This is why two identical-looking houses can be quoted very differently, and why a notably cheaper quote deserves a question: is it assuming the old surface can stay when it can’t? Rendering over an unsound surface just means the new finish fails along with the old one. Our guide to pebbledash removal cost covers that work in detail; our specialists strip pebbledash as part of a full re-render rather than as a stand-alone job. A tap test at survey is what decides it.

Scaffolding and access

Render is applied across whole elevations at height, so scaffolding is almost always needed, and it’s often one of the largest single costs. It may be built into a whole-job price or shown as a separate line. How much is needed depends on the height and footprint of the house and how easy it is to get to each wall: a two-storey detached house with gables needs far more than a single-storey wall.

Access complications push it further: restricted side access, a conservatory or extension to scaffold over, sloping ground, or scaffolding on the pavement, which needs a council licence that the scaffolder usually arranges. None of this is padding — it’s the cost of safe access to your walls. Because there’s no sensible national figure for scaffolding, ask for it itemised; our guide to scaffolding for rendering cost explains what drives it.

Where the money goes

Homeowners are often surprised by how the bill divides. Rendering is skilled, time-consuming work — preparation, base coat, bedding the mesh, waiting for each coat to be ready, primer, then the finish — and much of the cost sits in that labour and in the scaffolding that supports it, rather than in the bags of render themselves.

That matters in two ways. First, specifying a cheaper render product rarely moves the total much, because you’re shaving one input, not the main ones. Second, a suspiciously cheap quote should make you ask where the time is being saved: if the labour-heavy stages are priced low, something is usually being rushed or left out, and those are the hidden layers that decide how long the render lasts. A fair rate for skilled labour is the best value in the whole job.

Does the render brand affect the cost?

A little, but usually less than people expect. Because materials are only part of the total, the brand difference rarely transforms the final bill.

What a big-name brand gives you is recognition — worth something to some homeowners, less to others. If you’re trying to control cost, the brand is a minor lever compared with the wall, the access and the labour. Choose a quality system and a good installer, and don’t expect switching brands to change the price dramatically.

Do the finish and colour change the cost?

The colour itself generally isn’t a cost driver, because silicone render is through-coloured either way — you’re choosing a pigment, not paying for extra coats. The finish can make some difference, depending on the system and the texture, and so can the amount of detailing that goes with it, such as contrasting bands, quoins or different colours on different elevations, which add time.

If you’re undecided between finishes, ask for each option priced on the same quote so you can see the difference rather than guess at it. For most homeowners the finish is chosen on looks and upkeep, with cost a secondary consideration. Settling colour and finish before the quote is finalised also avoids changes mid-job, which are where unplanned costs tend to creep in.

What a complete quote should include

The gap between quotes often hides in what’s not stated. A complete silicone render quote should make clear that it covers:

• The full system — base coat, full render mesh, primer and topcoat.
• Beads at corners, edges and the base of the wall.
• Scaffolding and any licences, in or out.
• Preparation, including removal of old render if needed, and how unexpected repairs will be priced.
• Sills, downpipes, lights and other fittings — removing, extending or refitting.
• Waste disposal and any skip permit.
• Protection and making good — windows, paths, planting and clean-up.
• VAT — if the installer is VAT-registered and it’s excluded, the bill will be 20% higher than the headline.

A transparent quote spells all of this out; a vague one leaves room for the bill to climb. When a quote looks cheap, it’s usually because one or more of these is missing.

Repairing silicone render: what it costs

Not every silicone wall needs a full re-render. A small crack repair typically costs around indicative £150–£400, and larger patch areas around indicative £800–£2,500, depending on size, access and whether scaffolding is needed. Those figures can make sense where a well-built system has one damaged or failed area.

The catch with through-coloured render is matching. A new patch is a fresh batch going next to render that has weathered for years, so it may not match exactly, and some owners end up recoating a whole elevation for an even look. Where cracking is widespread or the original was poorly installed, repeated patching can cost more over time than putting it right once. Our guide to render repair cost covers repair pricing in more depth.

Cheaper alternatives — and false economies

If silicone stretches the budget, there are cheaper systems worth knowing about. Monocouche is also through-coloured and often a little cheaper, though generally less water-repellent — our silicone vs monocouche guide weighs them up. Sand and cement is cheaper still, but it isn’t through-coloured, so it needs painting now and redecorating later. Each is a legitimate choice where it suits the wall; the point is to choose a cheaper system deliberately.

The false economies are the ones to avoid. Skimping the base coat or mesh to lower a silicone quote stores up cracking that costs far more to put right than was saved. Rendering over failing pebbledash to dodge removal costs is another. If you need to spend less, step down to a cheaper render type with your eyes open — don’t buy a silicone job that’s been quietly hollowed out to hit a price.

Legitimate ways to keep the cost down

There are sensible ways to get more for your money without cutting corners:

• Do the walls together. Scaffolding and set-up are largely fixed costs, so rendering several elevations in one go is usually better value per wall than doing them one at a time.
• Use the scaffold twice. If gutters, fascias or windows need attention, having that done while the scaffold is up can save paying for access again later.
• Clear the access. Moving bins, sheds, planters and vehicles before work starts saves time that would otherwise be charged.
• Decide colour and finish early, so the job isn’t held up or changed mid-way.
• Be flexible on timing within the rendering season, if your specialist can fit you in more efficiently.
• Be guided by the survey on removal — don’t pay to strip sound render, and don’t refuse removal where it’s needed.

None of these touch the quality of the render system itself, which is where saving money backfires.

How to read and compare quotes

The most useful skill here is comparing like with like. Before judging on price, check each quote covers the same scope: the same walls, the same preparation (including any removal), scaffolding in or out, the same system, and VAT treated the same way. A quote that’s cheaper because it excludes scaffolding or assumes no preparation isn’t really cheaper — it’s answering a different question.

Once quotes are on equal terms, weigh price against what doesn’t show on the invoice: the installer’s track record, the workmanship guarantee and how clearly they’ve specified the hidden layers. Our guide on how to compare rendering quotes goes through this step by step. The aim is the best value, which is rarely the lowest number.

Budgeting and final thoughts

To plan sensibly, start from the indicative band for the number of walls you’re rendering, lean toward the upper end if you suspect old render needs removing or access is awkward, and keep a contingency for anything the survey or the strip-out uncovers — older walls in particular can hold surprises. Build scaffolding and VAT in from the outset so the real figure isn’t a shock. Our house rendering cost guide compares whole-house totals across every system, and our guide to exterior rendering covers the wider decisions.

Agree how you’ll pay before work starts, too. A written quote should say what deposit, if any, is due, what the stage payments are tied to — scaffold up, base coat done, topcoat finished — and that the final payment follows completion and your sign-off. Be wary of anyone asking for most of the money upfront, and keep every payment documented. Clear stages protect both sides and make it obvious where the job stands if anything changes once the old surface is off.

Most of our specialists take on projects from around £3,500, so they’re best suited to larger repairs and re-renders; for a single small job, a local builder or plasterer may be quicker. If you’re still deciding whether the spend is justified at all, see is silicone render worth it; if you’re ready, a couple of clear, itemised quotes for silicone render on your own walls will tell you far more than any national range.