St Astier Batichanvre

Hemp renders are applied in coats of 2-3 cm. maximum. Wait 30-90 minutes between coats. If no finishing coat with other materials is envisaged, wait 3-4 days before applying the last coat (2cm.). Consider using EcoMortar® Finish WP as a finishing coat, it is a very low capillarity natural lime mortar that will impede water ingress in the main hemp render. For painting with lime, wait for the work to dry (60-90 days) and use Uniprotect in external paint work. Don’t forget to loosen hemp if compacted in bundles.

Mixing in paddle mixers

Introduce the hemp and the sand. Whilst turning, spray with water mist until the hemp dampens (colour change). Introduce the Batichanvre and continue to spray until an homogeneous mix is obtained. Total mixing time is about 5 - 10 minutes.

Mixing in drum mixers

Introduce about 30 litres of water and the Batichanvre. Mix for 3-5 minutes to obtain a milky paste with no lumps. Add the loose hemp and mix for about 5 minutes to obtain the required mix adding the rest of the water. The completed mix should be rather dry and lean. Total mixing time is about 8-10 minutes