Plastering and Rendering Guides
Guide To Lime Putty Plasters
The first and most historic method used for plastering walls was the use of Lime Putty plasters (non-Hydraulic Lime). This type of plaster is ideal for the care and restoration of older buildings, and can be used internally and externally. Manufactured on site in Yorkshire by Womersley’s Ltd from lime putty, which has been allowed to mature for at least 4 months and selected aggregates.
Choosing the right Lime Plaster
We manufacture and supply a variety of ready-mixed performance plasters, supplied wet and ready to use or in premixed powdered form. Our Lime plasters are convenient to use, coming premixed to suit your application needs, we also sell ancillary products to support your application. So how do you choose the right Lime Plaster for the job you’re undertaking?
Use of Bonding Coats and Primers before Lime Plaster
A bonding coat or primer can sometimes be necessary before applying lime render or plaster. Below are options and the advantages/ disadvantages worth considering. Ironstone and Lime Green mineral primer are viable options worth considering for lime renders or plasters. These primers will ensure breathability of lime plaster or render, and provide a permanent, alkaline-resistant bond, for challenging high or low- absorbency backgrounds.
How to plaster over Laths
Lath and plaster work traditionally used riven oak or riven chestnut lath. These are laths split along the grain of the wood by hand. They are generally irregular in shape and thickness with a coarse surface that provides a good key. By the end of the 19th century, sawn lath produced by machinery was also much in evidence. These laths are straight and regular and provide less key to the mortar, hence the key formed by the plaster squeezed between the lath is of even greater importance.