Bauwer Light
Natural eco-friendly Bauwer Light is a highly breathable ready to mix thermal insulation render for both internal & external use. It’s based on naturally occurring volcanic glass perlite.
Bauwer Light is used for thermal insulation, sound-absorbing as well as fire protection. Along with the insulating and sound absorbent properties, Bauwer Light is light weight and highly breathable, which prevents condensation as well as protects the walls from fungus and mould growth. It is designed for insulation of solid stone and brick walls of traditionally built breathable or vapour permeable homes.
Yield of mortar from 1 bag: 25L
Spread rate: 1bag covers 1m2 at 25 mm thickness
Bag weight: 7,00kg
Pot life: up to 4 hours
Density of dry material: 280 kg/m3
Perlite (basic filler) thermal conductivit: 0,034W/(m·K)
Thermal conductivity in dry condition: 0,068 W/(m·K)
Average sound absorption coefficient at frequency of 0.8-8 kHz: 0.72-0.75
Vapour permeability coefficient µ: 4
Bond strength: 0,1 N/mm2
Compressive strength: 0,7 N/mm2
Declared strength value: after 28 days
Bauwer insulation is similar in a way with mineral wool insulation system. Bauwer Light is insulation layer,
key coat is an equivalent to mechanical fixings of mineral insulation, while Bauwer Finish is a base coat with mesh in.
Bauwer is applied in several coats using standard plastering tools and techniques. The recommended
thickness of Bauwer Light in one application should not exceed 40mm to 50mm.
Every layer applied
thereafter should be done at least after 4 hours.
1. The substrate with a key coat must be well moistened 2-3 hours before application of the Bauwer Light. It
is critical that substrate is not dry or soaking wet at the time of Bauwer Light application, so it is essential to wait for 2-3 hours in order to allow substrate to absorb the water.
2. Apply the Bauwer Light by hand using a stainless-steel trowel or using a plaster spraying machine, such as PFT G4, 5 or Mtec m330. Recommended parameters for PFT machines: Rotor stator type PFT D6-3, Water setting 150, Back pressure reading 13bar, Spray cap 10mm, Mixing shaft PFT Bionik Klimasan for light weight
mixes.
3. Run a straight edge up in an upward short left to right sawing motion to remove any excess Bauwer to
achieve a flat even finish. The surface of previous layer does not need to be well finished; a rougher surface will in fact provide a good key on which to apply the next layer.
4. Ensure the current layer surface is well wet before applying the next layer. If the mortar consistency
changes during the application, just re-mix the mortar with an electric mixing drill without adding water.
Leave the final BAUWER LIGHT coat for a couple of days to strengthen prior BAUWER FINISH application.
5. The surface of BAUWER LIGHT should be well moistened before BAUWER FINISH application.
6. Prepare BAUWER FINISH mortar: pour not less than 5 litres of water into a clean tub of at least 15 litres capacity; empty the content of the BAUWER FINISH bag into it. The mortar is mixed with a high speed electric mixing drill until a homogeneous mixture is obtained. The mortar mix should then be left for 3-5 minutes for
maturing. If required, add a small amount of water and re-mix the mass.
7. Apply a layer of BAUWER FINISH to the surface area by hand using a stainless steel trowel with pressure in
an upward motion. Apply the alkali-resistant fibreglass mesh with every sheet of mesh overlapping the previous one. Apply the next layer of BAUWER FINISH to the mesh by hand using a stainless steel trowel with pressure in an upward motion. Run a stainless steel trowel over the area to finish. The BAUWER FINISH
thickness should be 2.5 to 3.5mm with mesh in it.
8a. External application: BAUWER FINISH can be painted using a breathable paint for example silicate based masonry paint which is characterized by high vapour permeability or apply breathable thin coating Vimark ARENINO VK2 over Bauwer Finish.
8b. Internal application: BAUWER FINISH can be painted using a breathable water emulsion paint or skimmed with Vimark Plastex GB1 or alternative breathable finish.
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