´ Clay undercoat plaster with straw - Claytec
Clay plaster

Clay undercoat plaster with straw

Single or multilayer undercoat plaster for interior application. For 25 years now clay undercoat plaster with straw has been the classic for applying thick layers, e.g. on rough masonry, for wall panel heating or for restoration work in historical buildings. Up to 35 mm can be applied in a single operation. The material is highly workable, it sticks overhead, and is suitable for gap filling and much more. Clay undercoat plaster with straw is also a substrate for all coarse and fine Claytec clay topcoat plasters. Naturally-moist mortar is particularly resource-saving. Dry mortar never expires and can also be used with plastering machines.

Application
Single or multilayer basecoat plaster for interior application. Manual or machine plastering. For monument renovation, on masonry and solid building materials, for wall panel heating, on reed, etc.

Composition
Natural building clay up to 5 mm, mixed-grained washed sand 0 – 2 mm. Grain group, oversize grain according to DIN 0/4, <8 mm. Fibres barley straw up to 30 mm.

Material parameters
Drying shrinkage 2%. Strength class S II. Bending tensile strength 0.7 N/mm2 . Compressive strength 1.5 N/mm2 . Adhesive strength 0.10 N/mm2 . Gross density class 1.8. Thermal conductivity 0.91 W/m∙K. µ-value 5/10. Vapour adsorption class WS III. Building material class A1.

Supply form, coverage
Naturally-moist 05.001 in 1.0 T big-bags (yields 600 l plaster, 40 m2 area at D= 1.5 cm) Naturally-moist 05.201 in 0.5 T big-bags (yields 300 l plaster, 20 m2 area at D= 1.5 cm)  Dry 05.002 in 1.0 T big-bags (yields 625 l plaster, 42 m2 area at D = 1.5 cm) Dry 10.110 in 25 kg bags (yields 16.7 l plaster, 1.1 m2 area at D = 1.5 cm), 48 bags/pallet.

Storage
Store in a dry place. Naturally-moist, loam undercoat should be applied no later than 3 months after manufacture. In the case of dry goods, unlimited storage is possible. Naturally-moist goods must be stored in winter protected from freezing, otherwise workability during freezing is impaired.

DIN 18945-47
ECO-INSTITUT schadstoff- und emissionsgeprüft