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How to book a Crack Filling & Surface Preparation Pro in South Africa
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Frequently asked questions 👇
Quick guidance and answers to your questions about Crack filling and surface preparation in South Africa
Hairline cracks run R150 to R350 each, larger repairs R250 to R650, full-wall prep R350 to R900, and getting an entire room paint-ready R800 to R2,500. Skimming uneven walls flat costs R80 to R150 per square metre. Bundled with painting, prep usually prices better than booked alone.
Usually not — fine vertical hairlines are normal plaster settling and purely cosmetic. The ones worth attention are diagonal cracks running from corners of windows and doors, stepped cracks following the mortar lines, cracks wider than about 3mm, or any crack that reopens after proper repair. Those patterns suggest movement and deserve a builder’s assessment first.
Two culprits: surface-smeared filler that never bonded inside the crack (it shrinks and telegraphs as a ridge or reopens), and unprimed filler patches that absorb paint differently and show as dull spots. Professional repairs open the crack, fill in stages, sand flush, and prime — which is why they disappear.
Washing off dust and grease, stripping or sanding failed and glossy paint, repairing cracks and holes, skimming uneven areas, and priming — in whatever mix the wall needs. The goal is a uniform, sound, sealed surface. On old walls, preparation is routinely 60 to 70% of the total painting effort.
Yes — primed, prepped walls hold happily for weeks or months until you’re ready for colour. That said, booking prep and painting together usually prices better and guarantees the painter owns the whole result, with no gap for dust and scuffs to move in.
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The Cost of Crack Filling & Surface Preparation in South Africa
(Written by the Kandua Team, with practical insights from our network of vetted South African painters)
Here’s the secret every professional painter knows: the paint is the last 30% of the job. The finish you admire on a well-painted wall was decided before the first coat — in the crack repairs, the skimming, the sanding, and the priming that made the surface worth painting.
Crack filling and surface preparation is that work, bookable on its own or ahead of painting. This guide covers what it costs in South Africa, and how to tell a cosmetic crack from one that needs more than filler.
Expert Advice Before You Book
“Paint doesn’t hide anything — it announces it,” says a vetted painter on the Kandua network with over 15 years of experience. “Every bump, every badly filled crack, every patch of flaking paint shows through fresh colour in raking light. The walls people compliment are 70% preparation. And read your cracks: hairlines are cosmetic, but stepped or widening cracks are the wall talking about movement.”
- Prep once, properly: opening cracks into a V, filling with the right compound, and sanding flush beats smearing filler over the top — which is why DIY-filled cracks reappear as ridges.
- Watch the crack pattern: vertical hairlines in plaster are normal settling; diagonal cracks from corners of windows and doors, or cracks that step through brickwork, deserve a builder’s eye before cosmetic repair.
- Prime everything filled: raw filler drinks paint differently to the wall around it — unprimed patches show as dull spots through the final coat.
Typical Costs for Crack Filling & Surface Preparation
Here’s what South African homeowners can expect to pay in 2026:
- Hairline crack repairs: R150 to R350 per crack, filled, sanded, and primed.
- Larger cracks and plaster patches: R250 to R650 per area.
- Full wall preparation (strip, fill, sand, prime): R350 to R900 per wall.
- Room preparation (all walls, ready to paint): R800 to R2,500.
- Skim coating uneven walls: R80 to R150 per square metre.
- Damp-related repairs (treat, replaster patches): R450 to R1,800 per affected area.
For a deeper breakdown of rates, see the Kandua Painter Cost Guide.
How Location Affects Costs in South Africa
Prices vary by region, driven by local labour rates, travel distances, and demand:
- Western Cape: R180 to R400 per crack; clay-free soils mean fewer movement cracks, but winter damp repairs are common.
- Gauteng (Johannesburg & Pretoria): R150 to R350 per crack — clay soil movement makes settling cracks a regional specialty, especially after dry winters.
- KwaZulu-Natal: R150 to R380 per crack, with humidity-driven paint failure adding prep work.
Factors That Influence Your Final Quote
- Crack type: hairline settling cracks are quick; recurring or structural cracks need investigation and sometimes reinforced repair.
- Old paint condition: flaking, chalking, or gloss surfaces need stripping or sanding before anything else — sound paint just needs cleaning and keying.
- Wall flatness: walls with decades of patch-on-patch may be cheaper to skim entirely than to spot-fix.
- Damp: any crumbling, bubbling, or salty patches mean moisture — treat the cause before the cosmetics.
Cost Examples by Job Complexity
- Straightforward job: Fill, sand, and prime eight hairline cracks across two rooms. Time: Half a day. Typical cost: R900 to R1,800.
- Complex job: Lounge with decades of bad patches: stripped, cracks V-filled, walls skimmed flat, fully primed for painting. Time: 2 to 3 days. Typical cost: R3,500 to R6,500.
Customer Story
A homeowner in Pretoria shared: “Our 1970s house had cracks we’d filled so many times the walls looked quilted. The pro opened every crack properly, skimmed the two worst walls completely flat, and primed everything — he also pointed out one diagonal crack above the kitchen window worth showing a builder, which turned out to be a lintel issue caught early. The paint afterwards looks like glass.”
When to Hire a Professional
Preparation is where skill hides — and where problems surface. Call a professional when:
- Cracks keep coming back: a properly repaired crack that reopens is reporting movement — seasonal clay-soil movement is common in parts of South Africa, and repeat offenders deserve diagnosis, not a fourth layer of filler.
- The crack is structural in character: diagonal cracks from window and door corners, stepped cracks following brick joints, or anything wider than a few millimetres should be assessed by a builder or engineer before cosmetic repair hides the evidence.
- The old surface is failing: flaking and chalking paint means adhesion is gone — new paint over it peels on schedule. Stripping, treating, and priming is slower and is also the entire difference.
Checklist: Before Your Pro Arrives
- Photograph each crack (a coin in frame gives scale).
- Note any cracks that have reopened after previous repairs.
- Check for damp signs near cracks — bubbling, salts, soft plaster.
- Decide if painting follows immediately (booking both together prices best).
- Clear wall access and remove pictures and shelves beforehand.
Frequently Asked Questions (FAQ)
How much does crack filling and surface preparation cost in South Africa?
Hairline cracks run R150 to R350 each, larger repairs R250 to R650, full-wall prep R350 to R900, and getting an entire room paint-ready R800 to R2,500. Skimming uneven walls flat costs R80 to R150 per square metre. Bundled with painting, prep usually prices better than booked alone.
Are wall cracks in my house something to worry about?
Usually not — fine vertical hairlines are normal plaster settling and purely cosmetic. The ones worth attention are diagonal cracks running from corners of windows and doors, stepped cracks following the mortar lines, cracks wider than about 3mm, or any crack that reopens after proper repair. Those patterns suggest movement and deserve a builder’s assessment first.
Why do my filled cracks always show through the paint?
Two culprits: surface-smeared filler that never bonded inside the crack (it shrinks and telegraphs as a ridge or reopens), and unprimed filler patches that absorb paint differently and show as dull spots. Professional repairs open the crack, fill in stages, sand flush, and prime — which is why they disappear.
What does surface preparation actually include?
Washing off dust and grease, stripping or sanding failed and glossy paint, repairing cracks and holes, skimming uneven areas, and priming — in whatever mix the wall needs. The goal is a uniform, sound, sealed surface. On old walls, preparation is routinely 60 to 70% of the total painting effort.
Can I book preparation now and paint later?
Yes — primed, prepped walls hold happily for weeks or months until you’re ready for colour. That said, booking prep and painting together usually prices better and guarantees the painter owns the whole result, with no gap for dust and scuffs to move in.
Summary of Crack Filling & Surface Preparation Costs (2026)
- Budget jobs: from R150
- Average jobs: around R1,500
- High-end jobs: R6,500+
- Typical range: R150 to R6,500+
Ready to get it sorted? Post your job on Kandua and receive quotes from vetted, reviewed pros near you — fast, free, and with secure payment from start to finish.
Painters in South Africa: what to know before you book
Paint is the cheapest transformation a home can get — and the easiest one to get wrong. Two quotes for “the same job” can differ by thousands, and the difference is almost never the paint. It’s the preparation: what gets washed, scraped, filled, and primed before the first coat goes on.
Kandua helps you get it done properly by matching you with a vetted painter for your job — a single feature wall, a full interior, an exterior repaint, or a roof.
A few quick answers (so you don’t have to scroll)
How do I choose a good painter?
Pick someone whose quote names the exact paint product and number of coats in writing, itemises the prep work, and asks questions about surface condition before quoting. Vague quotes (“paint 3 bedrooms — R X”) are where disputes start.
What should painting cost?
Most painters quote per square metre of wall area: roughly R50 – R90/m² for labour only, or R100 – R250/m² including paint and materials. (There’s a pricing guide further down.)
Is exterior painting different from interior?
Yes — different paints (UV and weather resistance, elasticity), more prep, weather-dependent scheduling, and often work at height. Never use interior paint outside; it will fail early.
Can I just paint over damp, mould, or peeling paint?
No — and any painter who says yes is selling you a repaint in six months. The moisture source must be fixed and the surface properly prepared first, or the new coat bubbles and peels exactly where the old one did.
Common painting jobs (and what they actually involve)
- Interior rooms: moving and covering furniture, washing and filling walls, cutting in, two coats — a pro typically does a standard room in 4–8 hours including prep
- Full interiors: sequenced room by room over several days so you can keep living in the house
- Exterior walls: high-pressure washing, scraping loose paint, repairing cracked plaster, plaster primer on bare patches, then weather-resistant coats — the most prep-heavy job in painting
- Ceilings: often quoted separately; stains from old leaks need a stain-blocking primer or they bleed straight through new paint
- Doors, trim, and windows: enamel work is slow, careful brushwork — expect it itemised per item rather than per m²
- Roof painting: a specialised job with its own coatings and safety requirements, usually priced per m² of roof area
- Feature walls and colour changes: going from dark to light needs primer plus extra coats — budget for it upfront rather than discovering it on day two
Prep is 70% of the job (and why quotes differ so much)
When two quotes are far apart, compare the prep, not the price. A proper job includes:
- Washing: paint doesn’t bond to dust, grease, or chalking old paint
- Scraping and sanding: loose and flaking paint must come off — painting over it just glues the new coat to a failing surface
- Filling and repairs: cracks raked out and filled, holes patched, damaged plaster repaired
- Priming: bare plaster, filled patches, stains, and dark-to-light changes all need the right primer, not just “another coat”
- Masking and protection: floors, fittings, and gardens covered before the first tin opens
The cheap quote usually skips two or three of these. It looks the same on handover day — the difference shows up within a year.
When paint isn’t the fix — and who to call instead
Some “painting problems” are actually building problems wearing a paint costume:
1) Damp, mould, and bubbling paint
Bubbling, flaking, or mould that returns after cleaning means moisture is moving through the wall — from a leak, failed waterproofing, blocked gutters, or rising damp. Fix the source first; then paint. A painter can handle mould treatment and repainting once the cause is resolved, but rising damp and hidden leaks need specialist assessment.
2) Cracks
Hairline plaster cracks are cosmetic — rake, fill, prime, paint. Wide, growing, or stepped cracks in brickwork can signal movement and warrant a professional assessment before any cosmetic work.
3) Waterproofing
Parapet walls, flat roofs, and balconies that leak need proper waterproofing systems, not thicker paint. Some painters do waterproofing as a specialty — confirm the actual system and guarantee being quoted, not just “a waterproof coat”.
The good news: describe the symptoms to Jess and you’ll be matched with the right vetted pro for what the job actually needs — painter, waterproofing specialist, or plumber if there’s a leak behind it.
Pricing: what to budget for a painter in South Africa
Painting is usually quoted per square metre of wall area (not floor area), with day rates common for smaller or mixed jobs:
Typical cost structure
- Labour: per m² or per day, depending on the job
- Paint and materials (or supply your own by agreement)
- Prep and repairs: filling, scraping, priming — itemised on good quotes
- Access: scaffolding or ladders for double-volume walls and exteriors
- Clean-up and disposal where the job creates waste
Typical ranges you’ll see (guideline)
- Labour only: roughly R50 – R90 per m² for standard walls
- Including paint and materials: roughly R100 – R250 per m², depending on paint quality and surface condition
- Day rates: commonly R550 – R1,500 per painter per day depending on skill level
- A single standard room: often R1,500 – R6,000 including materials, by size and spec
What pushes a quote up
Heavy prep, textured surfaces (they take 20–25% more paint), dark-to-light colour changes, work at height, coastal exposure needing higher-spec coatings, and premium paint ranges. Cheap paint is a false economy — quality paint covers better, often needs fewer coats, and lasts years longer.
10 Genuinely helpful painter FAQ’s
- Do painters charge per square metre, per room, or per day?
All three exist. Per m² is standard for whole rooms and exteriors, per-day suits mixed or smaller jobs, and per-room flat rates are common for standard bedrooms. Whichever it is, get the paint product, coats, and prep itemised in writing. - How many coats do I need?
Two coats is the standard for a proper finish. Add primer for bare plaster, filled patches, stains, and dark-to-light changes — “one thick coat” is how patchy walls happen. - Does paint quality really matter?
Yes — it’s most of what you’re paying for. Premium paint covers better (sometimes saving a coat), washes clean, and lasts years longer, especially outside. Ask what product is being quoted and look it up. - How long does painting take?
A pro does a standard room in 4–8 hours including prep; full interiors run 3–7 days and exteriors 4–10 days depending on size, surface condition, and weather. Drying time between coats isn’t padding — it’s the job. - Can painting happen in winter or rain?
Interiors, yes, year-round. Exteriors need dry surfaces and reasonable temperatures for paint to cure properly — in winter-rainfall areas plan exterior work for the dry season, and in summer-rainfall areas work around the afternoon storms. - I’m going from a dark colour to a light one — what changes?
Budget for a coat of primer plus potentially a third colour coat. Skipping the primer means the old colour ghosts through and the “cheaper” quote ends up patchy. - What’s the difference between interior and exterior paint?
Exterior paint is engineered for UV, rain, and temperature movement; interior paint is engineered for washability and finish. They are not interchangeable — interior paint used outside fails fast. - Are ceilings, doors, and trim included in a wall quote?
Usually not — they’re itemised separately because ceiling work and enamel brushwork take different time and materials. Confirm exactly what surfaces the quote covers before comparing prices. - Do painters guarantee their work?
Reputable pros offer a workmanship guarantee — ask what’s covered and for how long, in writing. Paint manufacturers’ warranties apply only when the product is applied to spec, which is another reason proper prep matters. - What should I ask a painter before they start?
Three questions cover most issues:
- “Which exact paint product will you use, and how many coats — in writing on the quote?”
- “What prep is included — washing, scraping, filling, priming — and what’s excluded?”
- “What do you guarantee on workmanship, and for how long?”
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