Building conservation starts with understanding how the building works

We handle building conservation, lime mortar, lime plaster, render repairs and masonry repairs in older buildings and listed settings in Gothenburg and Northern Halland. The point is not just to repair a surface, but to choose a solution that works with the building's materials, moisture behaviour and movement.

Conservation guidance from SPAB follows the same practical principle we work by: repair as much as needed, replace no more than necessary, and use materials that are compatible with what is already there.

  • Lime mortar and lime plaster for older buildings
  • Traditional render build-ups and heritage repairs
  • Masonry and plaster repairs
  • Assessment of damp, salts and old cement repairs

See also lime plaster and lime mortar, plastering and lime mortar vs cement-based mortar.

Compatibility matters more than simply choosing a “strong” material

In older buildings, compatibility usually matters more than hardness. Technical guidance from Historic England makes the same point we see in practice: older masonry and plaster often work best with materials that cooperate with the substrate rather than overpower it. That is why lime mortar and lime plaster are often appropriate, but above all why the repair has to suit the building.

We regularly see cement repairs over lime-based walls, hard joints in softer brickwork and dense coatings in basements that really need to dry. Those system clashes can lead to cracking, salts, frost damage and delamination.

Traditional render, reed mat and heritage build-ups

Render repairs and traditional plastering need the right preparation, build-up and understanding of how the structure moves. In older buildings the substrate may be masonry, existing plaster, timber framing with reed mat or split lath. One method does not fit every surface.

We work with solutions where substrate, adhesion, layer thickness and finish all need to align. The goal is not just to recreate an old-looking surface, but to rebuild it in a way that actually performs.

Example: Kaserngården in Kviberg

A good example of this kind of work is work we have carried out at Ovre Kaserngarden in Kviberg, a listed military complex dating from 1895. The work there has mainly been interior, focused on older ceilings and sensitive constructions where traditional render on reed mat and plaster on timber framing demand more than a standard patch repair.

When a ceiling that is more than a hundred years old starts to fail, you cannot assume the problem is only the visible surface. You need to understand whether the issue is poor bond, aged mortar, movement in the timber structure or a build-up that has simply lost performance over time. That is exactly where conservation becomes practical craft rather than just product choice.

This kind of work sits close to both plastering, masonry and traditional heritage render repair, but it also demands respect for how the original construction was actually made.

Basements, damp and older walls that still need to dry

Older basements often go wrong when the repair is too dense or too rigid. Once the wall can no longer deal with moisture in the way it used to, you often get flaking, salts, staining or plaster detachment. The wall then gets blamed when the real problem is usually the repair system.

We therefore try to understand how moisture moves before recommending an intervention. In conservation work, what not to do is often as important as what to do.

Brick, stone and movement in older masonry

Older masonry is rarely uniform. Brick, natural stone, old joints, later repairs and several generations of plaster often meet in the same wall. Materials therefore have to work together. Hard repairs can shift stress into weaker parts, leading to cracks and failure where you least want them.

On the Swedish west coast this shows even faster because moisture, wind and freeze-thaw cycles put more pressure on the details. That is why we choose methods based on how the masonry actually behaves, not just how it looks from a distance.

How we work in older and listed settings

  1. Review of the substrate, damage, previous repairs and your goals.
  2. Assessment of what materials are likely already present and which parts are sensitive.
  3. Method selection with compatibility, moisture behaviour and build-up first.
  4. Execution where details, junctions and finishes are treated as part of the system.
  5. Coordination with other trades or parties when the project requires it.

In conservation work, quality is often created before the tools come out. That is why we put so much weight on the early decisions.

When several trades are involved, the whole sequence has to hold together

Older building projects often involve masonry, painting, carpentry and sometimes conservation or inspection steps. It is not enough for each stage to be acceptable in isolation. The next step also has to suit what has already been done.

We therefore try to catch the things that otherwise create trouble later: wrong sequencing, the wrong paint system, overly hard additions or details that seem reasonable on their own but do not work as a whole.

Common mistakes we see in older buildings

  • Hard materials on softer substrates that lead to cracking and failure.
  • The wrong approach in damp areas that traps moisture instead of helping the wall dry.
  • Fast cosmetic patching without analysis that does not last beyond a few seasons.
  • The wrong combination of plaster, joints and paint that destroys compatibility across the wall.

We prefer to start with the cause rather than the symptom. That is almost always cheaper than repairing the wrong thing first and then doing the job again later.

What to send us first

Please send photos of the full wall or facade, close-ups of cracks, detachment, salts or staining, the approximate age of the building if you know it, any information about previous repairs or paint systems, and whether the project concerns a facade, basement, masonry detail, plinth or traditional substrate such as reed mat.

We work in Gothenburg, Kungsbacka, Varberg, Fjaras, Frillesas and nearby areas. Get in touch and we will help define what the building actually needs.

Need the right conservation approach for an older building?

Tell us about the building, the substrate and the damage, and we will help define the right mortar, method and repair strategy for an older or listed setting.

Murkvalitet Västsverige AB
Org. no.: 559296-5544
Hakansgardsgatan 85, 434 36 Kungsbacka
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FAQ

Short answer first – then more detail.

What does building conservation mean in practice?

It means working with the building's materials and behaviour rather than against them. In practice, that means choosing compatible materials, the right build-up and avoiding repairs that create new problems later.

When are lime mortar or lime plaster the better choice?

Often in older buildings where the substrate is already lime-based or where the wall needs a more breathable and forgiving repair. But the right choice still depends on the building, the exposure and what is already there.

Why does plaster crack so easily in older buildings?

Cracks can come from movement, moisture, frost, earlier repairs or a mismatch between plaster and substrate. In older buildings, overly hard or incompatible repairs often create new stress in the wall.

Why does plaster detach in older settings?

Common reasons are moisture, poor bond, the wrong preparation or a mortar that does not suit the substrate. On the west coast those problems often show faster because of moisture and freeze-thaw cycles.

What are traditional render repairs and when are they needed?

They are traditional plastering methods used where the substrate needs a more careful build-up, such as older facades, reed mat or other sensitive backgrounds. The system behind the surface matters as much as the visible finish.

Can you repair plaster detachment in old ceilings with reed mat or timber framing?

Yes. In that kind of construction you first need to understand whether the failure comes from poor bond, aged mortar, movement in the timber structure or incompatible earlier repairs. The repair method then has to suit the original build-up rather than force a generic modern patch.

Can you work on listed or historically sensitive buildings?

Yes. We often work in older and historically sensitive environments where material choice, detailing and coordination need to be handled more carefully than in standard projects.

How do you identify what materials are already in the wall?

Some of it can be read from the surface, such as old repairs, how the plaster behaves and the masonry type. But an on-site assessment is often still needed before choosing the repair with any confidence.

Can you help with damp basements in older buildings?

Yes, but then you need to be careful with dense or unsuitable systems. We assess how the wall handles moisture and try to find a build-up that actually works in the basement's real conditions.

What happens during a site visit in an older building?

We review the substrate, the damage, earlier repairs and what you want to achieve. Then we talk through which materials and methods are likely to make sense, and whether the project needs coordination with other steps or trades.

How does the west-coast climate affect older facades and masonry?

Moisture, wind and freeze-thaw cycles make the consequences of the wrong material choice show up faster. That is why exposure and moisture load need to be considered from the start.