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In 1993 Nigel and Joyce Gervis, founders and directors of Tŷ-Mawr Lime, purchased Tŷ-Mawr, a run-down farm in the heart of the Brecon Beacons National...

Since establishing in 1995, Ty-Mawr Lime Ltd has made an enormous contribution to resurrecting the use of traditional building materials in Wales. We...

A business is born The potential for expansion was obvious and what started off as a temporary solution for a one-off renovation project...

Ty-Mawr Lime Ltd has made an enormous contribution to resurrecting the use of traditional building materials in Wales and has become a market leader...

1. Firstly, one of our core principles, when we started the business in 1993, was to produce building materials with minimal environmental...

Established in 1995, by husband and wife, Nigel and Joyce Gervis, Ty-Mawr Lime Ltd has made an enormous contribution to resurrecting the use of traditional...

A Brief History of Tŷ-Mawr It is not known exactly when the current house at ‘Tŷ-Mawr’ was built, it has changed ownership, changed ...

Established in 1995, Ty-Mawr Lime has become a market leader in the design, manufacture and distribution of natural building materials and systems, providing...

  The Lime Cycle The lime cycle shows the stages from quarrying the limestone through to the production of mortars...

Lime has been used as the binder in mortars, plasters, renders and paints for thousands of years. The oldest sample of lime plaster that we are aware...

Caring for buildings
The importance of lime mortars, plasters and paints in caring for old buildings has now been well documented...

There are many types of building lime on the market. It is crucially important to understand their differences and the way in which they perform...

It is important for the well-being of the building that the most appropriate lime product is chosen. Every situation needs to be carefully assessed e....

Guidance for Protecting Lime work all year round As with all good building practice using any mortars, plasters/renders and paints, ...

Mortar is a mixture of sand or aggregate and binder (lime or cement) that is most often used to build brick or block walls. This mixture creates a workable...

Its breathable! Lime mortar is highly breathable allowing water to pass through the building thereby avoiding a build-up of moisture...

Ty-Mawr’s mortars have always been manufactured as hot lime mixes.  We have perfected hot mixes over the last 20 years producing high-quality mortars...

Application Type of Lime Notes Pointing Tŷ-Mawr Premixed...

More than likely it is an earthen mortar or ‘stabilised soil’ dug straight out of the ground outside your house. This may have been mixed with some quicklime...

Dating mortar accurately is very difficult unless it is obviously something like a black ash mortar which was prevalent in the 19th and early 20th century...

Preparing the Mortar Do not add water - a premixed mortar when purchased may appear too dry. It must be ‘knocked-up’ (the process of...

Preparing the mix Mix the lime and aggregate by volume (check the specification for exact mix ratio for the job or refer to the table...

We are often asked if our lime mortars can be used with a conventional pointing gun. The answer is that you can with certain machines, usually the forced...

Crumbling or failing mortar can be caused by a number of reasons: Failing mortar can usually be attributed to a lack of carbonation...

Plastering or rendering is a method of using a coating similar od sand and lime over the existing brickwork/stonework. The difference between them is ...

Why choosing lime plaster/render might be the right decision for your next project: Historical Significance: Lime plaster/render has...

Ty-Mawr’s plasters and renders have always been manufactured as hot lime mixes.  We have perfected hot mixes over the last 20 years producing high...

  Base Coat Top Coat Ty-Mawr Lime Hemp Plaster 1 x 6mm Fine Hemp 1 x 6mm Fine...

  Base Coat Top Coat Ty-Mawr Fat Lime Plaster ...

  Base Coat Top Coat Ty-Mawr Fat Lime Plaster ...

Internal Plaster Options onto Masonry (Stone/Brick/Block)   Base Coat ...

  Base Coat Top Coat  Secil Isovit Lime (Dry Hydraulic Premix) 2 x...

External Plaster Options onto Cob/Rammed Earth/ Strawbale   Base Coat ...

External Plaster Options onto Lath   Base Coat Top Coat ...

We have a range of aggregates available that can be used across all applications including; pointing, plastering, rendering and screeding. We are continually...

When producing quotations for our sublime floors, all the materials required, are based on the information you have supplied, and will be included in ...

Depending on the size and location of your project, supplying the aggregate from our yard in the Brecon Beacons can significantly increase the delivery...

Guidance for Protecting Lime work all year round As with all good building practice using any mortars, plasters/renders and paints, ...

Paint in its simplest form consists of a binder, a solvent and a pigment. The binder allows the pigment (colour) to stick to the surface, whilst the solvent...

Firstly the word ‘breathable’ is not very helpful as buildings don’t actually breathe! – We tend to use the term vapour permeable. ...

Lime work should be finished with a vapour permeable paint, traditionally this would have been a limewash. Limewash has been and is still used throughout...

Can I make my own Limewash? You can make your own limewash in a number of ways: Buying our lime putty and watering down and whisking...

Please see the table below to see which surfaces are suitable and the number of coats required. If there is a background that isn’t available in the table...

What is a distemper? Distemper is a decorative paint and a historical medium for painting pictures. Distemper is an early form of ...

This will depend on atmospheric conditions including ventilation, temperature and humidity as well as any background moisture within the substrate which...

Casein is a protein found in milk, commonly used in various applications such as adhesives, paints, and even in some food products. Casein is added to...

A shelter coat limewash is a specialized type of limewash, that contains a fine aggregate, that is applied as a protective layer over an existing limewash...

Linseed oil is often added to the final limewash coat for several reasons, primarily to enhance its durability, water resistance, and adhesion to surfaces...

There are essentially two methods of insulating solid walls: Externally Internally ...

The general advantages of wool insulation against glass or mineral fibre quilt products would be:- Environmental issues, using a renewable resource to...

How do solid walls work? Solid walls are designed to enable moisture to be readily exchanged with the indoor and outdoor environments...

The U-value of a wall is a measure of the rate at which heat passes through the wall and so is a measure of how well insulated the wall is. it is expressed...

In the UK, 1 in 4 of our homes are classed as 'old' and are primarily 'solid' wall construction. Approximately 45 of the heat loss of an uninsulated solid...

Choosing a Board Schneider Board Application Brief Description Wall 180 External...

Why is there the amount of packaging on our insulation?   Plastic is necessary for packing quilted natural insulation. At present...

Plastic is necessary for packing quilted natural insulation.  At present there is no alternative material available that provides adequate protection...

“All the wool used in Thermafleece ...

We are often asked if locally produced small quantities of wool can be treated and processed by Ty-Mawr and its suppliers to produce Insulation? The manufacturer...

  Our original motivation in the mid-1990s was to develop a flooring system to replace the earth and broken flagstone floor in our Georgian kitchen...

Tŷ-Mawr’s Sublime® floor system was designed with solid wall construction in mind, to mitigate the risks that are created when a damp proof membrane...

Limecrete has three main components, Limecrete binder, aggregate and screed fibres, the mix ratio is 3 to 1 (3:1) by volume, with 3 parts aggregate to...

Coming soon...

The Limecrete slab (having a more open pore structure on a molecular level than concrete) can also provide a buffer to moisture vapour. The thickness...

Coming Soon 

Ty-Mawr has been designing and supplying floors since 1999. Thousands of floors have been supplied for everything from humble cottages to churches and...

The minimum overall depth of the Sublime floor system is 250mm, built up from 150mm Glapor and 100mm Limecrete. The Glapor minimum depth of 150mm is ...

Coming soon... 

Coming soon...