Application of colored, water-repellent render for preparation of coarse surfaces
RELATED MATERIALS
- MARMOCRET Decor – Pre-mixed, water-repellent render. Rough-textured finish
- MARMOCRET-BOND – Mortar for bonding spatterdash of render
- MARMOCRET-BASE – Pre-mixed render for the base coat
- PL-PRIMER – Render primer – Dehydration barrier
- ADIPLAST – Polymer latex for multiple improvements of mortars
- FIBERGLASS MESH – Fiberglass mesh for render reinforcing
I. NATURE OF THE PROBLEM - REQUIREMENTS
- The overlay of a building's facade consists of its characteristic architectural features. Therefore, they must present an aesthetically pleasing finish and, at the same time, be resistant to adverse weather conditions.
II. SOLUTION
The use of MARMOCRET Decor to create a decorative wall render with a coarse final surface is the ideal solution. It is a pre-mixed render with coarse-grade particles, which only requires the addition of water and offers the following advantages:
- It is completely watertight, according to DIN 18550.
- There is no need for facade painting.
- It allows excellent transpiration of the structure.
- It is a manufactured mortar with stable properties.
- It is suitable for external and internal use.
- It does not crack like ordinary cement-lime renders.
- It simplifies the job, since it only requires the addition of water.
It is suitable for making up white or colored, waterproof render. It usually replaces the finishing layer of render.
III. APPLICATION
Spatterdash layer
- Surfaces to be rendered must be free of grease, dust, loose particles etc. and should be thoroughly dampened. After that, a traditional spatterdash layer follows. On difficult and smooth surfaces such as expanded or extruded polystyrene thermal insulating boards, the spatterdash should be reinforced by the addition of ADIPLAST polymer latex (cement : sand : ADIPLAST : water = 1 : 1 : 0.25 : 0.25) to improve bonding. Instead of the traditional spatterdash layer, the premixed mortar MARMOCRET-BOND can be used.
Undercoat layer
- Once the spatterdash layer has hardened, a traditional undercoat layer is applied to smooth out the surface and correct any construction imperfections in the wall. Instead of the traditional undercoat layer, the premixed mortar MARMOCRET-BASE can be used.
- Wherever the underlying surface consists of insulating layers, such as polystyrene or polyurethane, on beams, columns, walls and construction joints, it is recommended that fiberglass mesh reinforcement for render is applied during the undercoat layer to avoid cracking due to thermal stresses and differential expansion of layers. The mesh is positioned on the still fresh undercoat and extended 10–15 cm beyond the area covered by the insulating boards.
- Before MARMOCRET Decor is applied, especially when colored, the surface should be primed with PL-PRIMER, which reduces absorptivity to ensure a uniform color. PL-PRIMER consumption: 40–100 g/m², depending on the absorptivity of the surface.
Finishing layer – Application of MARMOCRET Decor
- MARMOCRET Decor is added to clean water under continuous stirring until a mortar of the desired workability is obtained. The cement mixer must be clean to avoid altering the color.
- MARMOCRET Decor is applied as usual with a float or trowel or by using a plastering machine.
- The render is then treated (pressed) by plastic or wooden float in horizontal, vertical, or circular movements depending on the desired appearance of the surface. Working time depends on the substrate’s absorptivity and ambient temperature.
- MARMOCRET Decor consumption: Approx. 1.5 kg/m² per mm. Recommended thickness: 2.5–3.5 mm.
IV. REMARKS
- The temperature during application of the material must be between +5°C and +35°C.
- During summer months it is recommended that the rendered surface is kept damp after application to protect from dehydration due to high temperatures.
- Consult the usage risk and safety advice written on the bag.
RELATED MATERIALS
- MARMOCRET Decor – Pre-mixed, water-repellent render. Rough-textured finish
- MARMOCRET-BOND – Mortar for bonding spatterdash of render
- MARMOCRET-BASE – Pre-mixed render for the base coat
- PL-PRIMER – Render primer – Dehydration barrier
- ADIPLAST – Polymer latex for multiple improvements of mortars
- FIBERGLASS MESH – Fiberglass mesh for render reinforcing
I. NATURE OF THE PROBLEM - REQUIREMENTS
- The overlay of a building's facade consists of its characteristic architectural features. Therefore, they must present an aesthetically pleasing finish and, at the same time, be resistant to adverse weather conditions.
II. SOLUTION
The use of MARMOCRET Decor to create a decorative wall render with a coarse final surface is the ideal solution. It is a pre-mixed render with coarse-grade particles, which only requires the addition of water and offers the following advantages:
- It is completely watertight, according to DIN 18550.
- There is no need for facade painting.
- It allows excellent transpiration of the structure.
- It is a manufactured mortar with stable properties.
- It is suitable for external and internal use.
- It does not crack like ordinary cement-lime renders.
- It simplifies the job, since it only requires the addition of water.
It is suitable for making up white or colored, waterproof render. It usually replaces the finishing layer of render.
III. APPLICATION
Spatterdash layer
- Surfaces to be rendered must be free of grease, dust, loose particles etc. and should be thoroughly dampened. After that, a traditional spatterdash layer follows. On difficult and smooth surfaces such as expanded or extruded polystyrene thermal insulating boards, the spatterdash should be reinforced by the addition of ADIPLAST polymer latex (cement : sand : ADIPLAST : water = 1 : 1 : 0.25 : 0.25) to improve bonding. Instead of the traditional spatterdash layer, the premixed mortar MARMOCRET-BOND can be used.
Undercoat layer
- Once the spatterdash layer has hardened, a traditional undercoat layer is applied to smooth out the surface and correct any construction imperfections in the wall. Instead of the traditional undercoat layer, the premixed mortar MARMOCRET-BASE can be used.
- Wherever the underlying surface consists of insulating layers, such as polystyrene or polyurethane, on beams, columns, walls and construction joints, it is recommended that fiberglass mesh reinforcement for render is applied during the undercoat layer to avoid cracking due to thermal stresses and differential expansion of layers. The mesh is positioned on the still fresh undercoat and extended 10–15 cm beyond the area covered by the insulating boards.
- Before MARMOCRET Decor is applied, especially when colored, the surface should be primed with PL-PRIMER, which reduces absorptivity to ensure a uniform color. PL-PRIMER consumption: 40–100 g/m², depending on the absorptivity of the surface.
Finishing layer – Application of MARMOCRET Decor
- MARMOCRET Decor is added to clean water under continuous stirring until a mortar of the desired workability is obtained. The cement mixer must be clean to avoid altering the color.
- MARMOCRET Decor is applied as usual with a float or trowel or by using a plastering machine.
- The render is then treated (pressed) by plastic or wooden float in horizontal, vertical, or circular movements depending on the desired appearance of the surface. Working time depends on the substrate’s absorptivity and ambient temperature.
- MARMOCRET Decor consumption: Approx. 1.5 kg/m² per mm. Recommended thickness: 2.5–3.5 mm.
IV. REMARKS
- The temperature during application of the material must be between +5°C and +35°C.
- During summer months it is recommended that the rendered surface is kept damp after application to protect from dehydration due to high temperatures.
- Consult the usage risk and safety advice written on the bag.
