HP 9 KL lime-clay plaster with hemp
Composition
HP 9 KL is a mineral factory-made dry mortar of mortar group CS I according to DIN EN 998-1. HP 9 KL is composed of natural hydraulic lime, building clay, limestone and quartz sand, hemp and a small addition of cellulose. HP 9 KL contains no synthetic binders and is highly vapour-permeable (water vapour diffusion resistance factor µ = 6); its pH value of 11–13 (9–11 in the long term) creates conditions unfavourable to mould growth. Where humidity is permanently high, the cause of the moisture must be remedied and adequate ventilation ensured. Grain size: 2 mm
Use
Lime, clay and hemp: we have combined the three oldest building materials known to humankind, all thoroughly proven, in our natural lime-clay plaster with hemp, HP 9 KL. With its high pH value, lime creates conditions unfavourable to mould growth; clay provides a pleasant, earthy colouring and can absorb moisture from the indoor air and release it again; and hemp has a reinforcing effect and ensures ideal working properties. Our natural lime-clay plaster with hemp combines the properties of natural lime and clay plasters: high alkalinity, very vapour-permeable (water vapour diffusion resistance factor µ ≤ 7), capillary-active, can absorb moisture from the indoor air and release it again, buffering short-term fluctuations in humidity, and has a fully declared composition. HP 9 KL natural lime-clay plaster with hemp is a building material made from lime, clay and hemp at an affordable price, suitable for existing buildings and new builds, for renovation and for the conservation of listed buildings.
Application
HP 9 KL is used as a base coat plaster for interiors. It is very well suited to embedding wall heating systems. HP 9 KL can be applied to all types of masonry, concrete and plaster bases. On highly absorbent substrates and in very warm weather, the substrate must be sufficiently pre-wetted. If necessary, the plaster must be moistened with water after application. Alternatively, priming with Ziakosal (dilution 1:8) is recommended. Concrete surfaces must first be pre-coated with the lime bonding plaster HP 14 using a notched trowel. Once this has hardened sufficiently, HP 9 KL is applied at a thickness of approx. 10 mm. Surfaces to be tiled must be plastered with the lime-cement plaster HP1.
