Lime plaster and lime mortar when the wall needs to breathe

We handle lime plaster, lime mortar, lime plaster repairs, re-rendering and lime repointing in Gothenburg and Northern Halland. This is especially relevant for older buildings, basements, facades and masonry that need a breathable, compatible build-up rather than hard dense patching.

Guidance from SPAB and Historic England consistently points to compatibility and breathability in older masonry repairs. That matches our practical approach: the right lime system is not only about appearance, but about reducing cracking, delamination and recurring moisture problems.

  • Repair of cracks, hollow areas and detached lime plaster
  • Re-rendering of facades, plinths and details with lime-based systems
  • Repointing and masonry repairs using compatible lime mortar
  • Surface finish, texture matching and the right paint system

See also older & listed buildings, painting and lime mortar vs cement-based mortar.

When lime plaster is the right call

Lime plaster is often appropriate where the substrate is older, more moisture-sensitive or designed to work with softer breathable materials. That includes older brick, stone masonry, basements, heritage facades and walls where previous cement-rich repairs have caused fresh damage.

That does not mean lime is automatically right in every case. The important part is that the plaster, the substrate, the joints, any paint layers and the wall's moisture behaviour all work together.

Typical problems with lime plaster and old cement repairs

Common issues include cracks, hollow areas, salts, damp staining, flaking and repairs that are harder than the surrounding wall. Very often the problem is not just the visible surface, but that the wall can no longer dry or move properly.

Older lime plaster is also frequently patched with dense cement mortar. Those repairs can look strong but often move stress and moisture into the surrounding material instead.

What we actually do with lime mortar and lime plaster

We carry out local lime plaster repairs, larger re-rendering, lime mortar repointing, and repairs to reveals, plinths and other details where compatibility matters. On older buildings, a good job is rarely just about applying a new coat. It usually starts with understanding which layers still work and which ones should be removed.

The aim is not to make the wall look newer than it is. The aim is to make it function properly and still look right for the building.

The right lime mortar is more than just choosing something called lime

Lime mortar has to suit the existing masonry, plaster hardness, aggregate, exposure and the overall build-up. A mortar that is too hard can damage older masonry, while the wrong build-up can create poor durability or unnecessary maintenance.

We therefore look at compatibility first, not just product labels.

Texture, limewash and the right finish

With lime plaster, the finish is part of the system, not just decoration. We can match texture and appearance so repairs sit more naturally within the building. Where needed, we make a sample area first.

If the wall is going to be painted, the paint system must also be compatible. In some cases limewash is the right choice; in others a mineral silicate system is better. Read more on painting.

Does everything need to come off?

No. Historic England's technical guidance points out that older compatible plaster is often worth keeping when it is still sound and doing its job. That is also our starting point in practice. If the existing lime plaster still works, repairing the right areas is often better than removing too much.

There are cases where larger re-rendering makes sense, but that decision should follow an actual assessment rather than habit.

What to send us first

Please send front-facing photos of the wall or facade, close-ups of cracks, detachment, salts or staining, approximate dimensions and any information about previous repairs, paint or cement mortars.

That helps us judge whether the job looks like local repair, larger re-rendering or something that needs closer investigation first.

Lime plaster in Gothenburg & Northern Halland

We work in Gothenburg, Kungsbacka, Varberg, Fjaras, Frillesas and nearby areas. Whether you need older lime plaster repaired, a compatible lime mortar for repointing or the right finish for a breathable facade, we start by understanding how the building works.

Get in touch and we will help define the right next step.

Need the right lime system for your wall or facade?

Tell us about the wall, the damage and whether there are old cement repairs or existing paint, and we will help define the right lime plaster, lime mortar and repair scope.

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

When is lime plaster better than cement render?

Lime plaster is often the better fit for older masonry that needs to dry out and move more naturally. It is usually softer and more breathable than dense cement-rich patching.

That does not mean cement is always wrong, but incompatible materials are a common cause of cracking, detachment and trapped moisture in older walls.

Can you repair small areas without re-rendering everything?

Yes. Local repairs are often possible when the surrounding plaster is still sound and compatible with the wall. We try not to remove more than necessary.

If large areas have failed or older repairs have disrupted the whole build-up, broader re-rendering may make more sense.

How can you tell that older cement repairs are causing trouble?

Typical signs are cracking around the repair, damp staining, salts, frost damage or a patch that feels much harder than the surrounding plaster.

The issue is often that the dense repair no longer moves or dries in the same way as the original wall.

How do you choose the right lime mortar?

We look at the existing masonry, plaster hardness, exposure, thickness, earlier repairs and how the wall deals with moisture.

The right lime mortar is about compatibility with the whole construction, not just picking a product with the right name.

Can you handle lime repointing as well?

Yes. We also work with joints and masonry details where lime mortar is the correct choice, especially on older brickwork and other masonry that should not be locked in by hard joints.

Does all old plaster have to come off first?

No. Older plaster that is still sound and compatible is often worth keeping. We remove the parts that are loose, incompatible or actively causing problems.

Can you match texture and appearance on older lime plaster?

Yes. Matching texture and finish is often a key part of the work. We can adapt the surface and talk through the right finish so repairs sit more naturally within the building.

Should lime plaster be finished with limewash or something else?

That depends on the substrate, the appearance you want and what is already on the wall. In some cases limewash is right; in others a mineral silicate paint is the better fit.

Can lime plastering be done year-round?

Lime work is sensitive to temperature, drying conditions and weather. We plan timing and execution so the plaster has reasonable conditions to cure properly.

What should I send you first?

Please send overview photos, close-ups of cracks or detached areas, approximate dimensions and any information you have about previous repairs, paint or mortar.

Which areas do you serve?

We work in Gothenburg, Kungsbacka, Varberg, Fjaras, Frillesas and nearby parts of Northern Halland. Ask if you are unsure about your location.