Choosing a Bungaroosh Construction Company in Brighton and Hove
If your Brighton or Hove property contains bungaroosh, choosing a construction company should involve more than finding a general builder who is willing to repair the wall.
Bungaroosh is a distinctive form of traditional mixed masonry containing materials such as flint, brick and lime-bound aggregates. Its composition and condition can vary considerably, and repairs often require a different approach from modern brick or block construction.
Safe-Bricks specialises in bungaroosh, lime and traditional solid-wall construction across Brighton and Hove.
This guide explains what to look for when choosing a contractor to investigate, repair or alter a bungaroosh building.
Diagnosing Bungaroosh Wall Failure
We diagnose before we prescribe. Establishing why a wall has failed comes before any recommendation about how it should be repaired, because the same visible symptom — cracked render, damaged plaster, a damp patch — can arise from causes that require entirely different work. The purpose of the following checklist is to help an owner form a reasonable preliminary view of whether the damage is confined to the surface finish or whether the masonry itself has lost integrity.
Indications that damage is cosmetic
- Fine, hairline crazing confined to the render or plaster coat, with the masonry behind sounding solid when tapped.
- Cracks that follow the lines of a previous repair, a render bay joint or a plaster patch rather than passing through the wall itself.
- Localised staining, blistering paint or salting where a gutter, downpipe or window detail has been discharging onto one area.
- Damage that has not altered since it was first noticed, and that does not continue across an internal face in the same position.
- Openings, reveals and door frames that remain square, with doors and sashes still closing as they did.
Cosmetic damage is still worth attending to, because an open finish admits water into a breathable wall. Where moisture is present, the route it is taking should be established first — the same discipline we apply to diagnosing damp and moisture issues in solid-walled buildings.
Indications of structural instability
- Cracks wider than roughly two millimetres, tapering along their length, or stepping in a diagonal line from an opening.
- The same crack appearing internally and externally in a corresponding position, indicating it passes through the full thickness of the wall.
- Bulging, leaning or displacement of the wall face, most often above or below a window, at a return, or beneath a beam bearing.
- A hollow or drummy sound over a broad area, or material that can be raked out of the wall by hand once the finish is removed.
- Cracking that has demonstrably progressed — measure and date it, or photograph it against a fixed reference over several weeks.
- Distortion of openings, dropped lintels, sloping thresholds or doors and windows that have begun to bind.
- Failure concentrated where a structural alteration was previously made, or where a bearing sits on material that has softened.
Any of these warrants inspection rather than redecoration. Where loads, bearings or movement are involved, the assessment should be made alongside specialist structural engineers in Brighton and Hove before a repair is specified.
What to record before anyone quotes
- Photograph the complete elevation, then each defect close up, with something of known size beside it for scale.
- Photograph the corresponding internal face at the same location.
- Note when the damage was first seen, and whether it has changed since.
- Record the condition of gutters, downpipes, flashings, window details and external ground levels.
- Note any previous repairs, cement render, tanking or replastering, and roughly when they were carried out.
This checklist narrows the question; it does not answer it. A wall can appear stable beneath a sound finish and prove to be substantially voided once opened up, and a wall that looks alarming can be locally repairable. Our practice is to examine the building, identify the mechanism, and only then set out the repair — which is why we regard the diagnosis, not the quotation, as the first piece of work.
Material Compatibility: Why Lime Surpasses Cement
A solid historic wall on the Sussex coast has no cavity and no membrane. It manages water by absorbing it at the surface during driving rain and releasing it again by evaporation once conditions allow. Lime mortars, renders and plasters were selected for that duty: they are vapour-open, comparatively soft, and able to accommodate the small movements and salt loads of an exposed building without cracking the masonry around them. The material is not chosen out of sentiment for the period. It is chosen because the wall depends on being able to dry.
Compatibility, in practice, means three things: the repair should be no stronger than the material it is bonded to, no less permeable, and no more rigid. Where any of those conditions is broken, the wall — rather than the repair — becomes the weakest element and takes the damage. This is the reasoning behind our use of breathable lime finishes on bungaroosh and other traditional solid-wall construction.
How modern materials trap moisture in bungaroosh
Cement render
Ordinary Portland cement cures into a dense matrix with a very fine pore structure, giving it a far higher vapour resistance than the lime it replaces. The wall continues to take water in at cracks, junctions and ground level, but can no longer release it by evaporation. Moisture accumulates at the interface, chalk and lime-rich material soften, soluble salts crystallise where drying is obstructed, and freeze–thaw cycling completes the damage. Because cement is also stronger and stiffer than the wall behind it, the bond eventually fails and the render detaches in sheets, taking the outer face of the bungaroosh with it.
Plastic and film-forming paints
Masonry paints based on acrylic and other polymer films behave as a membrane over the finish. Even where a breathable lime render has been correctly applied, a plastic coating can reduce its drying capacity to the point that the system no longer functions. Blistering, flaking and localised saturation behind the film are the usual outcome. Mineral coatings such as limewash and silicate paints allow the wall to continue drying.
Injected chemical damp-proof courses
A chemical injection is designed to interrupt capillary rise in consistent modern masonry. Bungaroosh is an irregular composite of flint, brick, chalk, rubble and lime, so an injected band cannot be relied upon to form a continuous barrier through it, and in most cases rising damp is not the mechanism present. Brighton & Hove City Council notes that chemical damp treatments and standard tanking systems are not always effective in historic buildings, particularly those built of flint or bungaroosh. Where such a system is accompanied by dense waterproof render internally, moisture is commonly displaced rather than removed, reappearing higher up the wall or within embedded timber.
None of these materials is objectionable in itself, and a sound modern repair should not be removed simply because it contains cement. The objection is to applying a vapour-closed material to a wall whose survival depends on evaporation, and to doing so before the source of the moisture has been identified.
Drying and curing cannot be compressed
Heritage repair runs to the pace of the materials, and that pace is set by chemistry and weather rather than by the programme.
- Lime mortars and renders gain strength by carbonation, which proceeds gradually from the surface inwards and depends on temperature and humidity rather than on a fixed number of days.
- Multi-coat work requires each coat to be allowed to firm and shrink before the next is applied, or the finished surface will craze and delaminate.
- Newly applied lime must be protected from rapid drying, driving rain, frost and strong sun, which in a coastal, exposed location often means adjusting the programme around the weather.
- A solid wall that has been saturated for years needs a prolonged drying period once the water source is corrected; readings taken too early will misrepresent the repair.
- Decoration should follow the drying, not the calendar. A compatible mineral finish applied to a wall that is still releasing moisture will fail regardless of its quality.
A contractor who cannot explain the curing and drying intervals in a lime specification has not yet described the whole of the work. Where a programme leaves no allowance for them, the finish is likely to be the first thing to fail.
Why Specialist Bungaroosh Experience Matters
A contractor does not need to regard bungaroosh as mysterious or inherently defective.
They do, however, need to understand that it is not uniform modern masonry.
A bungaroosh wall can contain a combination of:
- Flint
- Brick fragments
- Stone or cobbles
- Lime mortar
- Rubble
- Other masonry inclusions
Brighton & Hove's own conservation documentation records bungaroosh as a characteristic local construction material, including walls formed from flint and brick bound in lime mortar.
That variability becomes important when the wall is:
- Repaired
- Drilled
- Rendered
- Plastered
- Structurally altered
- Partially dismantled
- Used to support new structural work
The contractor should therefore establish what is actually present before deciding how the work should be carried out.
A Bungaroosh Contractor Should Diagnose Before Repairing
The most important distinction is between identifying the visible symptom and diagnosing the defect that caused it. Damaged plaster or render is usually the end of a chain that began with a gutter, a roof detail, a plumbing leak or a ground level.
A contractor who cannot explain what caused the deterioration is not in a position to specify its repair. Equally, a moisture-meter reading is a prompt for investigation, not a diagnosis, and it should never on its own justify chemical injection, tanking or wholesale replastering of a traditional wall.
Ask What the Wall Is Actually Made From
Before significant bungaroosh repair, the contractor should understand the substrate.
Useful questions include:
- Is this actually bungaroosh?
- Is it load-bearing?
- How thick is the wall?
- Is the masonry fundamentally sound?
- What material is currently covering it?
- Are previous repairs present?
- Is deterioration local or widespread?
- Is water entering the wall?
- Are there structural cracks?
The answers influence the repair specification.
They Should Retain Sound Bungaroosh, Not Strip It
Finding bungaroosh does not mean the wall needs rebuilding. Where the existing fabric is sound, retaining it is preferable to demolition, and repair should concentrate on the genuinely defective areas.
A specialist should also be able to explain why a particular lime system has been chosen for the repair, rather than treating the word “lime” as a complete specification. How local repair and rebuilding are actually carried out is set out in full in our repair-method guide.
Judgement About Cement and Hard Render
Traditional-building advice is often reduced to the claim that cement must never appear on an old building. A sound modern repair should not automatically be removed simply because it contains cement; an excessively hard or detached one may justify removal where it is damaging the surrounding fabric.
Dense render can be considerably stronger than the bungaroosh beneath it, so a competent contractor will recognise when slow, controlled removal is necessary rather than levering it away and pulling original flint and lime-bound material out with it.
Look for a Clear Repair Sequence
A well-considered bungaroosh quotation should explain what happens in what order.
For example:
- 1Access and protection
- 2Investigation or opening up where required
- 3Repair of active defects
- 4Controlled removal
- 5Masonry repair or rebuilding
- 6Curing
- 7Rendering or plastering
- 8Drying
- 9Decoration
A quotation that simply says \u201cdamp treatment and replaster\u201d may not provide enough information to understand what is actually being repaired.
Compare Scope, Not Just Price
Bungaroosh quotations can differ substantially because contractors may be pricing completely different approaches.
One contractor might propose:
- Local patching
- Cement render
- Repainting
Another might propose:
- Controlled removal
- Repair of defective masonry
- Lime rebuilding
- Multi-coat lime render
- Internal making good
- Compatible decoration
These are not equivalent scopes.
When comparing prices, establish exactly what is included.
Questions to Ask a Bungaroosh Builder
Before appointing a contractor, consider asking:
- How have you identified the construction?
- What do you think caused the deterioration?
- Does the whole wall need removing?
- Which original materials can be retained?
- What mortar will be used?
- Why has that mortar been selected?
- What render or plaster system is proposed?
- How will hard existing render be removed?
- Are structural repairs required?
- Will an engineer be needed?
- How will the work be allowed to cure and dry?
- What final decoration is compatible with the repair?
A specialist should be able to explain the reasoning behind the specification.
Listed Buildings and Conservation Areas
Brighton and Hove contain extensive areas of historic building stock, including listed buildings and conservation areas where bungaroosh forms part of the surviving fabric. Historic England's current Listed Building Consent guidance itself uses a Brighton and Hove bungaroosh wall as an example of historic fabric.
Where work affects a listed building, Listed Building Consent may be required.
Conservation considerations may also influence:
- Render
- External appearance
- Materials
- Colour
- Historic detailing
- Window openings
- Structural alterations
The necessary approvals should be established before relevant work starts.
Safe-Bricks: Bungaroosh Specialists in Brighton
Safe-Bricks focuses on the construction types found throughout Brighton and Hove rather than treating every property as modern masonry.
Our bungaroosh work can include:
- Investigation
- Local masonry repair
- Substantial wall rebuilding
- Lime mortar work
- Structural repairs
- Removal of defective finishes
- Lime rendering
- Lime plastering
- Moisture investigation
- Repairs around windows and openings
Where a wall has already failed and requires intervention rather than assessment alone, that work is instructed as expert bungaroosh wall repairs, beginning with a diagnostic survey of the wall.
For homeowners who first need to understand what is inside their wall:
For properties where the wall is already visibly defective:
For an overview of the material and our approach to it:
Looking for a Bungaroosh Construction Company in Brighton and Hove?
If your property contains bungaroosh — or you suspect that it does — send Safe-Bricks photographs of the wall and the problem you are experiencing.
Useful photographs include:
- The complete elevation
- Close-ups of any exposed masonry
- Cracking
- Failed render
- Internal staining or plaster damage
- Corresponding internal and external views
- Windows and openings
- Gutters and downpipes
- Ground level where moisture is involved
Photographs can help us understand the likely construction and determine whether an inspection is the appropriate next step.
Not sure where to start?
Send us photographs of the area of concern. It is the most straightforward first step — we will look at what you can see and advise on the appropriate next steps.