Lime Mortar for use in Today’s Restoration and New Build Projects


Phil Brown

Over 30+ years ago, Phil began what would become three decades of research, passion and enthusiasm to learn more about traditional construction methods and, of course, the founding of Cornish Lime.

About the author

Phil Brown is the founder and Managing Director of Cornish Lime, with over 40 years of experience.

Why use Natural Lime Mortar

The use of natural lime mortars and renders has increased considerably in recent years compared to just a couple of decades ago. These simple, basic materials are fundamentally important to the long term survival of historic buildings, yet there are many who still regard their use with suspicion. Natural Lime Mortars are the only viable way to repair and restore much of the great architectural heritage of this country.

Invariably, our Historic Buildings, Monuments and Structures will have been constructed with the Natural Lime ‘Products of the Era’. Attempts to repair these national treasures with modern ‘Cement’ instead of a compatible Natural Lime Mortar, will frequently produce a worse result than no repair at all. These ‘Bodged Repairs’ then have to be reworked first to undo the damage inflicted by the alien chemical nature of modern cements before they can be repaired using the Natural Lime Mortar and Render that should have been used in the first place.

If you are involved in a repair or restoration project at the early planning stage you would be well advised to contact ‘Cornish Lime’ for advice on the appropriate Mortars and Renders for the repairs being undertaken. You may also like to attend our Lime Training Day course, a one day practical and theory course covering such topics as pointing, rendering, bag rubbing and plastering.

Learn more about our lime training courses

A close of lime render.

We have an extensive portfolio of prestigious projects where our expertise, advice and Natural Lime Mortar has formed the basis for extensive repairs and restoration including The National Trust and English Heritage. You may wish to view our information on Lime Putty and Coloured Mortars.

The Use of Natural Lime Mortar

Selecting the right Lime Mortar for your particular application can appear very daunting. That is where ‘Cornish Lime’ become not only a supplier, but a source of knowledge gained over decades of successful restoration projects using the same Natural Lime Mortars that they themselves manufacture today.

In addition to the freely given advice and comprehensive literature packs available, Cornish Lime also run regular, informative training courses and webinars on the use of Lime Mortars, Renders and Plasters including the versatility of their own Mature Natural Lime Putty.

The information provided by Cornish Lime is for informational purposes only and does not amount to a specification. Every project is unique, so please consult a professional before undertaking a project. Use of this site and reliance on any information on the site is solely at your own risk.

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6 thoughts on “Lime Mortar for use in Today’s Restoration and New Build Projects”

  1. We are having some restoration / repointing done inside and the guys say that you have a selection of different coloured mixes but I cannot find them. Can you tell me where on your site I can find the stock shades available so we can try and match it to the existing. Thanks.

  2. We are having issue with damp and water entering the cavity of our south facing gable end wall. I believe it’s of Tavistock Cut stone and natural stone construction as a facade wall creating a cavity with an inside block constructed wall. I have filled some of the holes that have been found in the pointing and I have done this with clear Silicone sealer. I have also checked the roof and found two slipped tiles that were obviously letting water into the cavity. The felt beneath is diminished but the tiles have been relocated as the Batten is still good. It has been suggested by a colleague that I ask Cornish Lime to see what would be recommended as a proportionate measure to take for what is essentially a lower end of the market property. I have a two lift scaffolding up at the moment so am looking at sorting everything before it’s removed.

    • Thank you for getting in touch. From your description it sounds like the roof is the major cause of your problem and you are taking action to rectify this. Once the roof is repaired we would suggest waiting to see if this solves your issue. You may find that once the water ingress has stopped that the walls dry out – this can take some time particularly in damper, colder weather but at this stage wouldn’t recommend any further action.

  3. Hi,

    I’m going to be rendering/pointing some internal stone walls in our ancient house in France. We like the uneven ‘semi-rendered’ look. ie plenty of stone visible but some quite deep bits of mortar here and there.It would be great if you could give me some advice as to the best lime mix to use.




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