; Leslie Cornell Building Restoration Ltd, St Austell, Cornwall, PL25 3RF
The Federation of Master Builders

Leslie Cornell Building Restoration Ltd


Unit 13/14 St Austell Bay Business Park,
Par Moor Road,
St Austell,
United Kingdom.
PL25 3RF


Tel: 01726337577
Mobile: 07851153683
Contact: Email us http://www.cornellcob.co.uk

When calling, please remember to say you got their number from the FMB website

Member details

Joined: 17/05/2016


Cob and Lime Specialist Cornwall Building Restoration Services

Leslie Cornell Building Restoration are passionate about the preservation, restoration and conservation of Historic buildings in Cornwall. Specialist Lime Plasterers Cornwall, Lime Pointing in Cornwall and all aspects of Cob in construction in Cornwall we offer a complete sympathetic building restoration service.

Visit our website for a closer look at the services we offer and our high standard of workmanship. In addition, our Testimonials page on the website provides some great feedback which we pride ourselves on and implement on every job.

Services in Cornwall -

  • Plans and Architectural Drawings
  • Listed Building Consent and Planning Application (Agents)
  • Principle Contractors
  • Cob Structural Reports and Assessments
  • Full Building Restoration Services
  • Cob Repairs/Cob Re-builds/Cob New Builds
  • Lime Plastering/Pointing/Rendering/Painting
  • Damp Limitation and Land Drainage Systems
  • Stone Wall Construction and Stone Masonry Cleaning
  • Bath Stone Cleaning and Bath Stone Repairs Cornwall

If there is anything you would like to discuss with Leslie about your project
however large or small please Contact Us.

Testimonials (10 testimonials)

Lime Pointing - Fowey


The lime re-pointing work carried out by Leslie and the team was both on schedule and to a high standard with professionalism and an informative approach. We were always aware of how the work was progressing and are very happy with the final product. It was reassuring to deal with someone with real experience in the use of lime mortar. I would be happy to use Leslie Cornell Building Restoration for future work on the property and I have no hesitation in recommending them to others.

Lime Pointing – Falmouth


We couldn't have been happier with the work the Cornell's carried out. Their response time from initial enquiry, to viewing the work and providing a competitive quote was all done within a week, no other companies did this. We were impressed by their knowledge of materials and techniques and their understanding to undertake the task sympathetically to the buildings needs, particularly in respect of the age and current condition of the building. The team were totally committed to providing excellent service that we were happy with at every stage. They worked appropriately for the jobs needs, even if that meant working on a Sunday morning, rain or shine. We would highly recommend Leslie Cornell Building Restoration to anybody.

Lime Pointing - Devoran


We asked Leslie Cornell to point the front of our 1860s cottage. We were delighted with the quality of the workmanship and the efficient and professional approach Leslie and the team took in preparing and tidying the site. We would be very happy to recommend.

Lime Pointing - Cornwall


Am very happy to recommend. Punctual service with excellent communication and professional end result.

Lime Putty Builder Cornwall


We bought a 200 year old stone cottage that had one of its exterior walls rendered in concrete, leaving it unable to breathe as originally intended. We contacted Leslie and he came to our house and gave it a thorough inspection and provided us with many ideas of how we could restore it back to its original form. The first priority for us was to have the concrete render removed as this was exacerbating a damp issue in the stone wall. What became evident very quickly was the knowledge and passion that Leslie exuded when it came to restoration projects and we quickly decided that this together with the examples of high quality craftsmanship that we saw in his previous work meant that he was the right person for us to work with. Within a week of accepting his quote Leslie and his team arrived on site and worked efficiently and effectively to remove the two storey render, using only hand tools as to preserve the integrity of the underlying stones. It was an absolute pleasure having Leslie Snr, Leslie Jnr and his team of passionate apprentices on site for the week. Every day the site was left clean and tidy and at the end of the project all the render was bagged and removed. They cleaned and washed the site so well you would hardly have known they were there. The exposed wall looks fantastic and we would not hesitate in using Leslie for future work at our home or recommending him for potential clients.

Listed Cob Wall Rebuild Cornwall


Dear Leslie, A huge thanks to you all for all your fantastic work and patience, for keeping everything so tidy in spite of the awful conditions at times; it has been great having you around and seeing the wall transformed from catastrophe to beauty. We are delighted with the outcome. If you need a reference from any clients, don’t hesitate to get in touch – we would happily talk to any prospective client for you. Thanks again to you, Leslie and all the team. All the very best – and see you soon.

Heritage Building Specialists Cornwall


Dear Leslie and Team We are very happy with our new looking building and very much appreciate the care and hard work that went into bringing about such a transformation. We also appreciate that you kept us informed of your progress and were kind and considerate to our neighbours.

Sympathetic Building Restoration Specialists Cornwall


Thanks for an expertly completed job. It looks really great. I had never dealt with grade II listed building repairs before, but you made the whole process easy, advising on and obtaining the relevant planning and listing permissions. All the work was done during my working hours, but you kept me informed of progress throughout.

Damp in Old Building Cornwall


A big Thank you to you, Leslie Jnr and all the chaps for their hard work. We are delighted with all the work carried out and will be in touch whenever we need work done in the future. I will certainly be recommending you to friends. Hope you all have a wonderful Christmas. ?

French Drain Installation Cornwall


We would recommend Leslie Cornell Building Restoration to anyone looking for someone to undertake renovation work on an old cob cottage like ours. For us, having this work done was a daunting prospect but we need not have worried. From the initial site visit onwards, when we first met Leslie, we knew we had made the right decision. Leslie’s enthusiasm and knowledge of cob building was immediately apparent and we found ourselves seeing our old home with fresh eyes! Once underway, the work proceeded quickly and efficiently. There was no mess, virtually no noise and we were kept informed at every step of the way. We feel completely confidant that the work was carried out to the highest standard and we would like to say a big thank you to Leslie and his team.

Case Studies


Cob Wall Building, St Austell


Leslie Cornell Building Restoration – Listed Cob Wall Specialists in Cornwall

Designed and built this cob boundary wall from the surrounding earth. In keeping with the surrounding property and stonework this cob wall in Cornwall looks like it has been there for a hundred years.

Using a digger to mix and lift the cob we were then able to fork the cob onto the wall and use our boots to compact and bind the cob to the previous layer.

Once the wall had been completed it was a must to put the slate capping on to ensure the head of the wall stayed dry.

Without this protection from the elements the wall would not last long but with it should last centuries.


Lime Bag Rub, Looe.


A lime bag rub plaster finish is used to show off a walls natural stone and undulations.

It is a happy compromise when stonework isn’t quite good enough to lime point. This Lime bag rub in Looe, Cornwall saw us remove 2 coats of cement render to expose the stonework and access the condition before a decision was made to render or re-point.

Low level damp was visible inside the property so removal of the cement based render was essential in allowing the walls longevity and ability to breath. Once de-clad a decision was made to bag rub this elevation. As you can see from the gallery pictures below a brick doorway and beautiful granite lintel were exposed and these features were picked out.

A 4 coat breathable lime paint will be applied in a colour that matches the rest of the render on the property.


If you require a lime bag rub in Cornwall and would like to discuss your project please Contact Us.

Lime Bag Rub Looe – Lime Bag Rub Cornwall – Lime Plaster Bag Rub Cornwall


Lime Rendering Chapel, St Columb Major.


These Grade 2 Listed, Victorian Memorial Chapels in Cornwall were constructedin 1856, and are situated in the ‘new’ cemetery of St Columb Major in Cornwall.


The towns’ original cemetery, next to the church, could not accommodate further internments, so an additional resting place was established. The North and South chapels were constructed and used as mortuary chapels.


The internal lime plasters to the porches [of both chapels] were in a state of disrepair and St Columb Town Council instructed us to replace them. Using an appropriate Natural Hydraulic Lime / sand mortar, a 3 –coat lime render was re-introduced to this project in Cornwall.


On this project, paint application was achieved with the assistance of Cornwall Young Farmers.


If you require Lime Rendering in Cornwall please Contact Us.


Barn Renovation Conversion, St Austell.


This early 18th Century, Grade 2 Listed agricultural building in St Austell,

Cornwall was part of the Penrice Estate until the 1970’s. A typical construction of stonework up to 1st floor level, cob to the eaves and a rag-slate roof, half-hipped to the gable end walls. The upper floor served as storage for hay, straw etc and the ground floor was used for livestock….in recent history, pigs…originally it housed the ploughing horses

The great storm of 1998 caused multiple failures to the main trusses of the roof, resulting in cob collapse to the South elevation and localised areas of high-level disruption to the substrate/s. Temporary protection was introduced to minimise erosion [to the cob], and for many years the building remained in this condition.

Building Renovation Services - Leslie Cornell Building Restoration were engaged to rebuild all of the failed cob and reinstate the roof. Suitable sub-soil was located on site and the walls were rebuilt. Evidence of rat-runs were identified and these were systematically repaired using pre-formed cob bricks and blocks, which we made on site here in Cornwall.

Roof - The newly introduced roof structure was a combination of reclaimed timbers (main trusses) and treated timbers, with natural slate for the roof covering. Insulation was installed to create a ‘warm’ roof, avoiding thermal bridging.

Door and windows - All of the new doors and windows and frames were bespoke crafted in Cornwall and meticulous attention to detail was required to ensure an accurate reproduction. Windows are Argon-filled, double-glazed units.

New Extension - Planning permission was granted by Cornwall Council for a ‘sympathetic,’ single-store extension to be constructed to the East elevation. A conventional, cavity wall structure was established and clad with natural stone, dressed granite quoins and was lime pointed. To maintain continuity, the door and windows were made to correspond with the main building.

Ground floor/s - 100mm insulation was installed and under-floor heating pipes were introduced [to both buildings] and appropriately ‘zoned’. A conventional concrete slab was laid, incorporating the pipes, thereby becoming an integral component of the under-floor heating system. Finished floor surfacing is Delabole slate.

Cills - Reclaimed natural slate cills were installed [to both buildings] internally and externally.

Lime Rendering – Lime Plastering – Lime Painting Cornwall. Using an appropriate Natural Hydraulic Lime (NHL) / sand mortar, external cob elevations were lime rendered and a floated / sponged finish achieved. Internally, a 3-coat lime plaster was introduced to the exposed cob. All existing stonework was re-pointed using a NHL / sand mortar. External lime paint applications consist of a 4-coat, non-mineral-based system. Internal paint applications are natural, resin-based coatings. Vaulted ceilings in the main building, exposed the roof trusses and purlins. Ceiling construction is lathe and lime plaster.

If you have a barn conversion or require Heritage Building Services in Cornwall please Contact Us.

Member type

FMB Member

  • Has a minimum of twelve months trading
  • Have provided a professional reference
  • Have passed credit checks, public record and director checks
  • Verified no un-discharged bankruptcies or relevant and outstanding County Court Judgments
  • Has Public and Employer (if applicable) Liability Insurance
  • VAT registration (if applicable)
  • Confirmation of business address/details
  • Leslie Cornell Building Restoration Ltd has agreed to abide by the FMB Disputes Resolution and Complaints Procedures
  • Has signed up to the FMB Code of Practice
  • Can offer the suite of Build Assure warranty products for the domestic and commercial markets (contact the Build Assure office for rates)

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