Dry Clay Undercoat Plaster

Womersley’s Dry Clay Undercoat Plaster is a blend of milled clay, sand aggregates and hemp straw. Supplied as a dry coarse backing coat which is ready to mix with water.  After water has been added, allow to mature for 5-7 days and apply.  For internal use on masonry, render carrying boards, laths, brick and earth blocks, or straw bales (after they have been primed with a Clay Slip).

Clay plasters not only look beautiful but have brilliant eco-credentials for a sustainable and healthy home.  Clay Plasters harden by drying and, as no chemical reaction takes place, they remain workable for a lengthy period and can be reworked with the addition of water. 

• Manufactured on site in Yorkshire using locally sourced milled clay and specialist sand aggregates
• Reinforced with hemp straw
• 100% Natural and completely free of toxins, polymers, VOC’s and plastics
• Minimal carbon footprint
• Surfaces with clay are cool in summer and warm in winter.
• Clay is both a breathable and a hygroscopic material and so helps to manage damp and regulate humidity.
• Clay helps to absorb odours.
• Suitable for creating comfortable modern buildings and older building refurbishment.

A 20l tub provides coverage of approximately 1.5 m² at 10 mm thick.

Can be used in conjunction with Womersley’s Clay Slip and Topcoat plasters