Tŷ-Mawr Lime Ltd.

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Tŷ-Mawr Lime Ltd. Manufacturer and supplier of traditional and sustainable building materials and systems since 1993. See www.lime.org.uk or 01874 611350 to find out more.

Run regular courses in lime, limecrete, retrofitting natural insulation and thatching! Established in 1995, by husband and wife - Nigel and Joyce Gervis, Tyˆ -Mawr Lime Ltd has made an enormous contribution to resurrecting the use of traditional building materials in Wales and has become a market leader in the design, manufacture and distribution of environmentally-friendly building materials and systems providing a 'one-stop' shop to clients throughout the UK. They have received several awards for their work in this field and at the end of 2009, were named as one of the 52 sustainability champions on Wales' first Green List! Their approach to buildings and building products has inspired the following principles that are core to the whole business, namely:

caring for buildings
Caring for buildings requires an understanding of how they are constructed and hence how they are designed to function – only then is it possible to identify appropriate materials to repair them. We understand the technical qualities of each of our products, this enables us to give the best possible advice and support for all of our products. Our 'documentation' and 'application' sections on this website are also designed to help guide you through some of the product specification and applications details. Careful product selection is vital to ensure the health and longevity of your building. Caring for the environment:

All of our products are designed, assessed and selected to have minimal environmental impact. We continually work to monitor and improve the environmental credentials of all of our products e.g. we have developed plasters that use recycled glass as an aggregate (instead of extracting virgin sand) or hemp fibres which are fully renewable, our natural emulsions are plant-based with a full declaration of ingredients and where they come from etc. As well as being concerned about the source of our raw materials, we are also extremely concerned about where they go at the end of the day - construction and demolition (C&D) waste is a big problem in Wales. The Environment Agency’s trend data show no improvement on C&D waste being diverted from landfill in the last four years. Around 2.5 million tonnes of C&D waste were handled in 2007 by waste facilities in Wales. Nearly half of this waste was landfilled, and only eight years of landfill space remains in Wales. Lime products are recyclable, hence we have worked hard at developing e.g. the limecrete floor whick unlike concrete can be recycled and favour products like sheep's wool insulation that unlike conventional insulation materials can also be recycled/composted! In 2004, we achieved the Green Dragon Environment Standard Level II which demonstrates our commitment to the environment - from the paper we choose through to the way in which any waste is disposed. It runs through every aspect of our business, we are not merely producing and selling these products because it is becoming fashionable, it is absolutely core to our business and always has been e.g. our head office and training centre no longer run on oil, it is all heated through a heat recovery system installed on the manufacturing yard, backed up by a biomass boiler - this means that we are saving up to 40 tonnes of carbon dioxide emissions per annum! Quality:

We have been determined to maintain the quality of our products and services as the business has grown. In 2007, we gained our ISO9001:2000 quality management system award helping to ensure that we deliver the
best possible products and services. Our clients come back to us time and time again - problems do occur but we make sure that we do everything possible to overcome it if at all possible to ensure that your project continues as smoothly as possible.. "I would like to thank you for all the time and effort you devoted to ensuring the paint arrived in time for us to complete our decorating. Your hard work and professionalism was really appreciated, and far above and beyond the call of duty. Many companies would simply have given us the name of the courier and a transit number, and let us get on with it. Your company has demonstrated real customer care". AW, March 2010. caring for health

Our products pose no health hazard to those using or living with the materials. It is estimated that we spend up to 90% of our time indoors, so the quality of the internal environment is important to our well being. Our materials do not contribute to indoor pollution; in fact some of them actually help to improve indoor air quality e.g. Tyˆ -Mawr THERMAFLEECE® sheep's wool insulation actually locks in formaldehyde given off by heavily glued products. Sustainability:

We want to contribute to a sustainable future – we believe that one important aspect of this is through supporting local communities – we strive to buy and promote local and British products. Where this is not possible, we work to find the product with the best ecological and technical credentials and hope that in generating a market, a local product may eventually be produced. This has happened with several of our products, most notably our sheep's wool insulation which now contains 75% Welsh wool, this will contribute in a small way to sustaining the rural communities in which we live and work. We believe this is also important to our customers/potential customers, especially now when there are so many 'natural' products coming onto the market available through chain stores and large merchants etc but if they are being transported across the world then we can not see how this is part of a sustainable solution/future? We insist on knowing what our raw materials/products contain, where and how they are processed and how they are transported! Innovation:

Finally, we are excited about combining new and traditional materials in innovative ways. As a result, we have developed two award winning products: the insulated limecrete floor and the glaster® plaster and mortar and hemp lime plaster ranges - all of which are better for the enviornment too! "Your help was invaluable in the early stages and your website is really good, but most of all, the friendly, helpful response that I received on every occassion that I contacted Ty-Mawr convinced me that you were the people to place the order with and we are not disappointed with our choice in any way. Many thanks to you and your team..." C.W.Essex. "Just a quick note to say thanks for supplying us with the lime to revovate our house, its now finished and looking fantastic. Customer service was great, your lorrys always turned up when you said they would and the quality was always consistantly good, Thanks again". PL, West Wales.

A Sublime® insulated limecrete floor installation over the weekend .
08/10/2026

A Sublime® insulated limecrete floor installation over the weekend .

03/10/2026
02/10/2026
Beautiful work.
02/10/2026

Beautiful work.

Due to demand this year, we have put on an additional Limecrete Day in the Brecon Beacons, mid Wales, on the 9th October...
28/09/2026

Due to demand this year, we have put on an additional Limecrete Day in the Brecon Beacons, mid Wales, on the 9th October, with just a few spaces still available.

This one-day course is a comprehensive introduction to our Sublime ® Insulated Limecrete Floor system, from deciding if the system is suitable, to its design, considerations for individual projects, to a full practical demonstration of installation. We will run this course at one of our sites where floors are in the process of being laid so attendees can experience the whole process and get hands-on experience with the materials.

“I recently attended the Limecrete course with Ty-Mawr Lime and found it to be an excellent and highly informative experience. The course was well structured, combining theory and practical application in a way that was engaging and easy to follow. As someone working within the heritage and restoration sector, I found the knowledge shared invaluable and directly relevant to the services I provide to my clients. The training has increased my understanding of traditional building methods and limecrete systems, giving me greater confidence and expertise that I can apply in future projects….The tutors were knowledgeable, approachable, and generous with their expertise, creating an enjoyable learning environment where questions and discussion were encouraged throughout. I would highly recommend this course to anyone involved in heritage construction, conservation, or the renovation of traditional buildings”

To find out more, or to reserve your space, please visit our website https://www.lime.org.uk/courses-site-visits-cpds/courses/limecrete-floor-installation.html -

H**pcrete walls, bio-based blocks and breathable lime finishes are fast becoming essential tools for low-carbon construc...
07/09/2026

H**pcrete walls, bio-based blocks and breathable lime finishes are fast becoming essential tools for low-carbon construction and retrofit in the UK. To explore what they can bring to your projects, Saint-Astier invites you to The H**p Event, an evening seminar in central London on Tuesday 15 September 2026. We are delighted to be joining them to present a case study on our Tŷ Bloc product range! See our website for further information! See our website for further information! https://share.google/WW3RvPZwx4IbgUfjU **pbuilding

A diverse range of fibre has always been added to lime mixes to reduce shrinkage and improve flexural and compressive st...
30/08/2026

A diverse range of fibre has always been added to lime mixes to reduce shrinkage and improve flexural and compressive strength, this was predominantly cattle hair but whatever was local and readily available was utilised. Modern construction mostly uses synthetic or imported animal hair, raising environmental and ethical concerns.

Ty-Mawr offers dispersible, h**p fibres as a direct substitute for animal/plastic.

These are available in two lengths: 12mm for mortars and plasters, and 24mm for floor screeds and slabs. They come in dissolvable paper bags that can be added straight into the mix as needed.

These fibres are supplied and used as standard in all of our fibres mixes and floor systems, as well as supplied by the bag.

Glorious rain has arrived. Check your gutters!!Before you consider materials, remember a building only performs if its w...
27/08/2026

Glorious rain has arrived. Check your gutters!!

Before you consider materials, remember a building only performs if its water management system is functioning — gutters, downpipes, detailing and drains, all effectively moving water away.

Thanks for the picture, .

The second image shows a lack of maintenance that caused a small warehouse flood here this morning. We are all guilty...

Choosing the right finish for your lime plaster matters for your health and your home, at Ty-Mawr we have a range of low...
21/08/2026

Choosing the right finish for your lime plaster matters for your health and your home, at Ty-Mawr we have a range of low impact, breathable paints including our own limewashes, Beeck’s natural mineral paints as well as Earthborn clay paints – to see full information and colour charts - visit our website – www.lime.org.uk

First in the queue for our thatching course with Alan Jones
08/08/2026

First in the queue for our thatching course with Alan Jones

Address

Unit 12 Brecon Enterprise Park
Brecon
LD38BT

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