VENETIAN POLISHED PLASTER
Venetian Plaster, Tadelakt and Marmorino have been used since the middle ages to create stunning finishes. There are many differing names in use today – they are often called Polished Plasters or Marbled Plasters because of the typical finishes that can be achieved. They can be smooth, shiny and marble like or textured to look like stone. We make three types of plaster to achieve different finishes.
Our Venetian Plaster is made to a traditional formula based on our own superfine matured lime putty and the finest Italian marble dust together with specially selected natural waxes and oils. It contains no cement, resins or acrylics. We supply it in 54 fabulous colours, plus brilliant white, and also provide a colour matching service. Venetian Plaster is designed to be plastered in very thin coats with special trowels or spatulas. The overall thickness will usually be between 0.5 and 1mm, the number of coats depends on the desired effect.
Traditional Venetian Plasters work best over porous surfaces which provide some suction to aid adhesion. If the suction is excessive, we supply a natural casein-based primer which can be applied first. We supply special primers such as Gekkkosol for use on impervious materials, which primes and gives a sandpaper-like finish for extra key.
For showers, wet rooms and floors, we recommend Tadelakt, a Moroccan style polished plaster.
These natural plasters are breathable. We supply a wide range of natural soaps, oils and waxes to give a polished finish or increased water repellency for use in kitchens, bathrooms and showers. We also supply special metallic and pearlescent pigments for special effects.
USING VENETIAN PLASTER
Health & Safety – Venetian plasters are highly alkaline, use suitable gloves and eye protection.
First Stage – If the surface has excessive suction, prime with Kreidezeit Casein Primer. For impervious materials, prime Kreidezeit Gekkkosol Fine. Separate guide sheets are available for all products. Otherwise, go straight to the second stage.
Second Stage – Apply a base coat of Kreidezeit Lime Wall finish (smooth) about 1 mm thick with a Pavan 846/I stainless steel laying on trowel. This coat can be coloured for different veining and marbling effects. Trowel flat, leaving the texture you want to show through the subsequent coats of Venetian plaster. Leave to dry and harden for at least 3-4 hours.
Third Stage – Apply a first thin coat of Venetian Plaster, using either a Pavan 825, a Pavan 816/PIT or a Kreidezeit Japanese 0.3mm Trowel. Work on a small area at a time, about 0.5m x 0.5m maximum. Use the edge of the trowel or spatula at a slightly greater angle to the wall, apply in short cross-cross strokes, keeping the edge wet. The plaster surface should be kept as flat as possible. Continue across the wall until you have completed the first coat. Coloured plaster will become lighter in colour as it dries. To achieve different effects in the final finish, this coat can be partially applied.
Fourth Stage – The second thin coat can be typically applied within 1-2 hours. Work in the same way as for the first coat, but hold the trowel or spatula at a slightly greater angle to the wall, so that the edge can be used to fill in any defects or hollows in the first coat. Apply with a Pavan 825, a Pavan 816/PIT or a Kreidezeit Japanese 0.3mm Trowel.
One, two or three coats of venetian plaster can give ample thickness to achieve the three dimensional marbled effect. When you start the final coat, its advisable to start the burnishing process within 30 – 60 minutes of application. Test a small area to see if its ready. If you burnish too soon, the suction of the trowel or spatula can lift off the final coat of plaster leaving small indents. If you burnish too late it will take a lot more effort to get a shine. On a large wall, it will help to have two people working together, one applying the plaster and another following on behind with the burnishing.
Fifth Stage – Burnishing & Soaping
1. Lightly flatten the surface with the edge of the trowel, but do not overwork the surface. If you need to flatten the plaster further, leave the plaster to dry and spray with highly diluted polishing soap. Trowel lightly again. The Pavan 824 trowel or Kreidezeit Japanese Trowel 0.2mm work best.
2. As the plaster dries you can polish the plaster with the edge or flat of the trowel or spatula, using short, circular strokes. The smaller the tool, the more pressure can be applied to the surface. The more even your plaster, the more consistent the shine you can achieve. You can brush on a little polishing soap and lightly trowel this into and across the plaster as it gets closer to drying. Leave to dry and lightly buff with a cloth. We supply a range of metallic pigments which are used to create special effects, by mixing a little pigment in with the polishing soap. Pigments include gold, silver,bronze, copper and pearlescent lilac.
Sixth Stage – Waxing
Allow a day after burnishing for the Venetian plaster to cure and harden. Venetian plaster is breathable and will allow moisture vapour to pass through in both directions. For extra protection or to increase its water shedding there are various combinations of natural soaps and waxes that we supply. All the comprehensive guide sheets for their use are on our website. We find that a 50/50 mix of Kreidezeit polishing soap and Kreidezeit Punic Wax works very well. Brush on a little and spread it into and across the plaster with the burnishing trowel and leave to dry and buff up.
For increased water repellency and shine, add a coat of any of the following waxes:
Kreidezeit Punic Wax – this is a beeswax paste that may be applied by trowel. It can be buffed with a lambswool bonnet to an intense shine.
Kreidezeit Carnuba Wax – A hard, cost effective liquid wax for extra shine.
Biofa Hard Floor Wax – A harder wearing surface as it is based on Carnauba Wax.
Venetian Plastering Product Packages
Introductory packages for Venetian Plastering offering great savings of up to 20%!
Ranging from the starter package to the professional they offer all the materials you will require to begin this increasingly sought after plastering technique. These prices include VAT and delivery (please note that delivery price is to England, Wales and Scottish borders other addresses will incur higher rates – price on request)