External Lime Top Coat (Finish) Plaster
Ty-Mawr Premixed External Lime Top Coat Render is a premixed, ready-to-use render that simply requires 'knocking-up' prior to use. It is made from our high calcium/non-hydraulic lime blended with carefully selected, fine aggregates which helps to ensure good workability as well as minimal shrinkage. There are different products for internal and external applications - please seek advice if you are unsure what to choose!
Estimate how much you will need by using our calculator!
Collection
Next Day Pallet
Economy Pallet
Parcel Delivery
Ty-Mawr Premixed External Lime Top Coat Render is a premixed, ready-to-use render that simply requires 'knocking-up' prior to use.
It is made from our high calcium/non-hydraulic lime blended with carefully selected, fine aggregates which helps to ensure good workability as well as minimal shrinkage.
There are different products for internal and external applications - please seek advice if you are unsure what to choose!
It requires exposure to Carbon Dioxide in the presence of moisture to harden. It is therefore important to use these plasters at an appropriate time of the year and to protect them from drying too rapidly.
To see an example of this product in use, see our case studies for St Mary's Priory, Abergavenny, Plas Newydd, Llangollen, St Mary's Church, Chalgrove and Somerset Rural Life Museum, Glastonbury.
Preparing the mix
- The plaster needs to be ‘knocked-up’ - a process of chopping, beating and turning which will release some water. Only the minimum amount of water should be added if required to make a workable mix, it should be used as stiff as possible.
- A mortar mill or forced action mixer is the ideal way to ‘knockup’ the lime plaster but this is not always possible. If a bell mixer is used, then it should be left turning for long enough to achieve a suitable consistency without adding water (20- 30 minutes).
- If water is required, it should be added CAUTIOUSLY.
- If hair is required, gently tease in towards the end of the ‘knocking-up’ process – avoid hair balls.
Application of the Plaster/Render
- Externally, one coat at 4-6mm of the External Lime Top Coat Plaster can be applied.
Suitable For
- External Top Coat on Ty-Mawr Base Coats
Coverage Rate
- A 25kg will cover 1.5m2 at 6mm
- Gives a consistent, accurate mix thus removing the potential for any mixing and gauging errors.
- Minimises waste, enables you to 'knock-up' as much as you require in a day. Anything left over can be reused, so nothing going to waste.
- High quality aggregate selection produces a very workable 'fatty' mix, minimising shrinkage.
- Helps to keep the site organised and clean.
- Their ability to control moisture makes them highly appropriate for use with other ecological materials.
- It is generally accepted that lime plasters can improve the internal environment, regulating humidity by absorbing moisture, unlike modern plasters.
25kg Bag
Tonne Bulk Bag
