Repairing A Wall Using Traditional Lime Plaster

 DAY 1
I,m currently in the process of repairing this damaged wall using the Traditonal Lime Plaster. There's an area on the wall that has been repaired (unsuccessfully) using Carlite Bonding. (Note: if possible I strongly recommend repairing using like for like materials). I removed this and replaced with a first backing coat of Haired Lime Plaster (this is a mixture of sand, lime & horsehair). This must now be allowed to dry and go hard before laying another coat.

                                          
DAY 2
Now that the first base coat of Lime Render is dry and hard (normally takes up to 7 days), a further coat can now be laid. This coat will be lightly scratched (as shown in the photo) to provide a key for the Lime Plaster finish coat.

                                       
DAY 3
Now the final base coat is dry and hard, the Lime Plaster Finish coat can be applied. As shown below.

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Rendered Wall Using Haired Lime Plaster

The old damaged render was removed exposing the brick wall. 3 coats of Haired Lime Render was then laid, the final coat floated to a smooth rendered finish.

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Internal 3-Coat Lime Plaster

This plaster involves 2 coats of a traditional sand and lime mix backing, with added animal hair or fibre for strength. It is then topped with a final coat of slaked-lime putty and fine sand. We will restore, secure and repair old limework and repair or reinstate lathe and plaster walls.

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Advantages Of Lime Plastering

There are many advantages to using Lime Plaster but the most impressive are its breathability and flexibility making it very useful for conservation and older buildings.

Breathable

Lime plaster will allow moisture to easily pass through whereas cement will trap and prevent moisture from escaping, leading to a greater problem - gradually building and then ultimately forcing the damp to come out elsewhere.

Flexible

Whilst cement based plasters and renders are strong in compressive strength they lack greatly in flexibility. Any movement can easily result in the very strong cement based plaster cracking and if used externally will allow the ingress of water and damp. Then the damp will be trapped behind a non breathable render. 

So while lime is not as hard, it's more flexible, so suited for use in an older buildings. 

In this room the ceiling was plasterboarded and skimmed using normal plaster. All the walls were plastered using Traditional Lime Render and Lime Finish Plaster.

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Walls & Ceiling Restored - Using Lime Plaster

Lime is historically appropriate to many older buildings and authenticity is key when repairing or restoring them. Here's a recent example of walls & ceiling that have been beautifully restored using lime:

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