Exterior & heritage

Belgravia stucco, the prep we do before the first coat

Planning exterior painting in Belgravia. This guide explains how we prepare stucco the right way, what we check on day one, which steps protect the façade, and how a careful prep makes the final coats last.

November 4, 2025

Short answer: Great exterior results start with the base. We survey the stucco, fix cracks and blown areas, remove salts, prime with the right mineral system, and only then apply finish coats. This sequence keeps water out, keeps colour even, and gives a calm, long lasting look on Belgravia façades. If you want the full service, speak to us about exterior and heritage painting.

Belgravia homes have stucco that needs care. The surface looks smooth, yet it can hide early signs of water entry or trapped salts. A quick rub and paint may look fine for a season, then the problems return. The right way is patient. We read the building, plan repairs, and use products that suit a mineral substrate. The finish then holds its tone, copes with London weather, and keeps the crisp lines that make these streets feel special.

What we look for on day one

We begin with a slow walk around the façade. We note hairline cracking, hollow sounds that suggest delamination, and any blistering near sills or string courses. We check cills, cornices, parapets, window heads, and any flat areas that can hold water. Downpipes, fixings, and old drill holes often tell a story. If salts are present, there may be pale powder on the surface or paint that lifts in flakes. We mark all of this before any sanding or washing, because cleaning can hide clues for a while.

At the same time we check access. Safe scaffold gives the best results, since careful repairs and brush work need a steady base. We protect stone steps and iron railings. We plan a clean route for residents and keep the entrance tidy each day. A calm site is part of a calm finish.

Cleaning that respects stucco

Stucco does not want harsh blasting. We use a gentle wash to remove soot and grime without forcing water deep into the surface. On algae or light biological growth we use treatments that work slowly, then we rinse carefully. The façade must dry before any primers or fillers go on. Rushing this stage traps moisture. Later, that moisture can push out salts or lift coatings. Clean, dry, and patient is the simple rule.

How we find and fix cracks

Hairline cracks are common around window heads and corners. We open them slightly so filler can seat fully rather than sitting on the top. Where the crack follows a joint or a structural move, a flexible detail may be better than a hard filler. Larger cracks or hollow areas need a different approach. If tapping gives a hollow sound, we take back to sound material, then rebuild with a compatible stucco repair. The aim is to remove the weakness rather than hide it under paint.

Edges and mouldings need special care. Sharp profiles on cornices or string courses define the façade. We rebuild these with tools that keep the line true. A small loss in a moulding will always catch the morning light. Repair it now and the paint will sit proud later.

Salts and why they matter

Salts show that moisture has travelled through the stucco and carried minerals to the surface. If you paint over them, they can push the new coats away. We brush back to remove loose salts, then use the correct treatment so the substrate can dry. This may add days to the plan, yet it saves seasons of trouble. Once the wall shows stable, we proceed with priming. Skipping this step is the reason many façades peel again after a single winter.

Primers that suit mineral surfaces

Stucco wants mineral friendly primers. These help new coats bond while allowing moisture to breathe out safely. We do not use heavy, plastic films on a wall that should move and release vapour. A good mineral system gives a calm matte look that reads as stone, not plastic. If you want to compare options for your building, we can explain the differences on a quick call or during a site visit. You can start here to learn more about our exterior approach.

Choosing the right finish for Belgravia light

Belgravia streets have soft daylight that reflects from pale façades. A balanced matte or mineral finish suits this light and keeps detail clear on cornices and reveals. High sheen can emphasize surface waves and can look out of place on stucco. Colour choices often stay near soft stones and creams, with depth added by railings and front doors. If you want to see how tone feels across a whole elevation, we test panels near a window head and near a shadow line. The same colour can read differently at each level.

Window frames, sills, and reveals

Windows are where water tries to get in. We check sills for small falls and cracks near the ends. We check mastic lines around frames and make them neat and tight. On sash windows, careful prep on putty lines stops early failure. We use sharp masking and brush carefully into reveals so the edge looks clean when seen from the pavement. If frames need joinery repairs, we schedule that early. A sound window makes paint last longer and keeps the elevation tidy in side light.

Metalwork and details

Downpipes, brackets, and small fixings often rust and leave stains on stucco. We prep metal with the right primers and topcoats, then we refit in a way that sheds water. Where past fixings leave holes, we fill them flush so streaks do not return. Railings get a separate plan with a firm system on the iron. When railings look deep and even, the whole façade feels complete.

Protecting paving and neighbours

We sheet pavements and risers, and we keep a tidy line along the edge to respect the street. We speak with neighbours where work lines up with their boundary. We time louder tasks for the right hours. We plan deliveries for quiet moments. These small acts keep the project smooth and let the paint team focus on quality.

When heritage rules may apply

Some buildings have heritage status or sit in sensitive areas. Colour changes, render repairs, or alterations to detail can need consent. We help you notice where a request to the council makes sense, then your appointed professional can take it forward. Our job is to keep the craft correct and the finish in character.

Our day by day plan for a standard elevation

  • Day 1: Survey, mark repairs, gentle wash, protect paving and railings.
  • Day 2: Open cracks, remove loose areas, treat salts, begin repairs.
  • Day 3: Complete repairs, shape mouldings, allow cures and drying.
  • Day 4: Prime mineral surfaces, spot prime metal, recheck reveals.
  • Day 5: First coat on stucco, first coat on metalwork, review edges.
  • Day 6: Second coat on stucco, second coat on metalwork, tidy lines.
  • Day 7: Snag list, clean down, remove protection, final walk through.

This plan changes with height, weather, and the amount of repair work. Large homes or façades with deep cornice repair will take longer. Empty properties can move faster since set up and wrap down are simpler.

Weather and timing in London

Moisture and temperature drive the schedule. We avoid painting wet stucco or painting ahead of heavy rain. Calm, dry days give better adhesion and a flatter look. In cooler months we plan more drying time. In warmer spells we manage open time so brush marks lay smooth and even. Planning around London weather is a skill in itself, and it shows in the finished surface.

Colour testing on the façade

Test pots on card are useful, yet real panels on the building tell the truth. We place samples near architectural detail and on a flat wall. We look at them in morning light and late afternoon. We step back across the street and judge tone next to railings and stone. Only then do we lock in the colour. If you want to browse work with similar tones, view our recent projects and the finishes we delivered.

Common problems we prevent

  • Blistering near sills: Solved by fixing hairline cracks, sealing joints, and using breathable systems.
  • Flaking over salts: Solved by patient treatment and proper primers.
  • Peeling on mouldings: Solved by shaping repairs and allowing full cure before coatings.
  • Dirty edge lines: Solved by clean masking and steady brush control in reveals and at string courses.

Finish levels and what changes the look

The same colour can look very different with a different sheen or system. A true mineral finish sits quiet and elegant. A mid sheen can make curves look harder. Ask for a small area near a cornice and a small area on a flat wall to see both. Pick the one that makes the building look calm from across the street.

Aftercare that keeps the façade fresh

Once the paint has settled, a gentle annual wash keeps pollution films off the surface. Avoid harsh scrubbing. Clear blocked gutters and fix small leaks early so water does not track onto the stucco. If you notice faint salts or a small crack, call before the problem grows. Quick care keeps the elevation steady for years.

Access, scaffold, and neat edges

We plan access to suit the building and the street. Where scaffold is required, we work with tidy sheeting and smart routes for entry. We protect bay roofs and small flat sections. We cut clean lines along parapets and at string courses. The eye reads these edges from far away, so they deserve time.

Working while you live at home

Many clients stay in their home during the work. We keep doorways clear at agreed times and manage daily clean downs. We speak with the porter if your building has one. We keep tools stored and areas safe. Clear communication makes the week feel simple and keeps stress low for you and your neighbours.

Cost drivers without numbers

Prices move with access, height, the amount of repair work, and the system you choose. Stucco repairs, moulding rebuilds, and salt treatment add time. Mineral systems can take more time up front, yet they return value in a stable finish. If you share photos and a short description of the issues, we can give a clear written plan. When you are ready, request a site visit and we will map the steps.

Why prep is where value lives

Prep is not just sanding and filler. It is the careful reading of a building, the choice of a system that suits stucco, and a tidy, patient method. This is what keeps paint in place and colour true. It is what makes a Belgravia façade look settled, with crisp details and a clean glow in soft daylight. When the base is right, the top coats sing quietly and stay that way.

Areas we cover

We work across Prime Central London, with frequent projects in Belgravia, Kensington, Chelsea, Notting Hill, Knightsbridge, and Westminster. If your façade needs a careful plan, we can visit, mark repairs, agree colours, and show sample areas before work begins. You can also view a selection of our work in the Central London residence and West London period home case studies.

Next steps

Ready to plan your exterior repaint? Share a few photos of the façade, tell us where you see cracks or peeling, and say how the elevation faces. We will reply with a simple plan, a safe access method, and a clear schedule. To get started now, send us a message or book a quick visit.

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