Make sure that the concrete backing for applying the plaster system is made of structural concrete with a strength suitable for the application. Take care that the concrete is strong and dry (less than 2% moisture content) and no dust, oil, paint, cement water, gypsum plaster or the like is present. Make sure it is free of loose bits, blemishes, dirt, grease, or anything else liable to impair the adhesion of the system. Plastering works may be proceeded with no less than 28 days after the completion of the concrete casting work. Plaster should not be applied when the temperature is below 5°C or above 35°C, high winds are blowing, it is raining, or hamsin conditions prevail. In all events, a sunshade should be put up over the work area.

The compressive strength of the base should be at least 30 MPa and the pull-off strength shall be at least 1 MPa. 

The compressive strength of the base should be at least 30 MPa and the pull-off strength shall be at least 1 MPa. 

Before proceeding with application, thoroughly rinse the base and make sure that the backing wall has been moistened. Start application when the base is damp but not moist.

Use BG Repaircrete 305 - a cement mortar with a high final strength for concrete repair and renewal supplied in 25 kg. bags. 

To prepare the mixture pour 3.75 l. of clean water into a clean vessel and slowly add the entire contents of the bag. Stir the mixture for 5 minutes using an electric stirrer with a special spiral arm for bonding mixes until a lump-free uniform mixture is obtained. Following the initial stirring operation, wait about 3 min. and stir again for 2 min. 

Firmly press the mixture on to the concrete surface and smooth with a plastering trowel. If a layer thicker than 20 mm. needs to be built up, wait at least two hours between layers.

If exposed iron is present, the concrete surrounding the iron bar is to be carved out to a depth of at least 10 cm. behind the bar. Remove any dust, grease, or loose bits from the bars and remove rust by mechanical means or sand spray until a clean iron surface is obtained. Spread 2 layers of BG Armoseal 340 over the steel reinforcement bars. Allow to dry and apply BG Repaircrete 305 to fully cover the reinforcement bars.  

Use BG cementitious base plaster for rigid claddings and plaster systems in ordinary and marine environments, supplied in 25 kg. bags. To prepare the mixture pour about 5.5 l. of clean water into a clean vessel for a 25 kg. bag or 8.5 l. of water for a 40 kg. bag, and slowly add the entire contents of the bag. Stir the mixture for 5 minutes using an electric stirrer with a special spiral arm for bonding mixes until a lump-free uniform mixture is obtained. Following the initial stirring operation, wait about 3 min. and stir again for 2 min. To obtain the desired workability up to 2% of water may be added. 

Before proceeding with machine application, make sure that the filling compartment of the machine is free of remnants of other types of plaster. Fill the compartment with BG scratch plaster, adjust the quantity of water in the machine as desired and start spraying. Before starting to apply the scratch layer, make sure 24 hours have elapsed since completion of the base preparation.

Levelling bars and corner pieces shall only be mounted using a cementitious mixture. Moisten and rinse well until the water is absorbed in the base. Spray or spread a thin layer over the base and press on with the smooth side of the plasterer’s trowel. Complete immediately with an additional layer until the required thickness is obtained. When spreading press the plaster well on to the base and then comb with a toothed trowel. Application thickness: 5 - 7 mm. The thermal plaster shall be applied over the scratch layer 72 hours after the scratch plaster has been applied. Insofar as waiting is not possible, curing and application of the material are to be effected within 5 days of completion of the scratch layer. If fibreglass meshes are used as required under SI 1920 Part 2, they are to be embedded in the scratch layer. 

On the day following completion of the plastering, curing is to be started by moistening the plaster layer for three days consecutively, at least three times a day. In regions where the plaster dries quickly, curing is to be started on the same day. 

Use BG 400 thermal insulation plaster, supplied in 23 kg. bags. To prepare the mixture pour 13 - 14 l. of clean water into a clean vessel and slowly add the entire contents of the bag. Stir the mixture for 5 minutes using an electric stirrer with a special spiral arm for bonding mixes until a lump-free uniform mixture is obtained. Following the initial stirring operation, wait about 3 min. and stir again for 2 min. To obtain the desired workability up to 2% of water may be added. 

Before proceeding with machine application, make sure that the filling compartment of the machine is free of remnants of other types of plaster. Fill the compartment with BG 400 thermal insulation plaster, adjust the quantity of water in the machine as desired and start spraying. 

Before starting to apply the thermal plaster, inspect the scratch layer and if necessary repair cracks wider than 0.5 mm. Allow the scratch layer to dry for 24 hours but no more than 72 hours from the time of its completion. Rinse the base well and make sure that the backing wall has been moistened before starting the application. 

Spray or spread, with the smooth side of the plasterer’s trowel, a thin 5 mm. thick layer of BG scratch plaster over the plastered base and press on. Complete immediately with additional layers until the required thickness is obtained. Levelling and smoothing shall be carried out using a metal h-section bar and metal trowel. Application thickness: 20 -55 mm., to be determined on the basis of the required thermal resistance as specified in Standards 5075, 1045 and 1414.

On the day following completion of the plastering, curing is to be started by moistening the plaster layer. For each cm. of plaster, one day of curing should be allowed, and in any event no less than 3 days, three times a day. In regions where the plaster dries quickly, curing is to be started on the same day. 

Use BG protective plaster for thermal plaster, supplied in 40 kg. bags. To prepare the mixture pour 8 l. of clean water into a clean vessel and slowly add the entire contents of the bag. Stir the mixture for 5 minutes using an electric stirrer with a special spiral arm for bonding mixes until a lump-free uniform mixture is obtained. Following the initial stirring operation, wait about 3 min. and stir again for 2 min. 

Use BG protective plaster for thermal plaster, supplied in 40 kg. bags. To prepare the mixture pour 8 l. of clean water into a clean vessel and slowly add the entire contents of the bag. Stir the mixture for 5 minutes using an electric stirrer with a special spiral arm for bonding mixes until a lump-free uniform mixture is obtained. Following the initial stirring operation, wait about 3 min. and stir again for 2 min. 

A layer of protective plaster shall be applied 5 days following completion of the thermal plaster layer application. Before proceeding with application, thoroughly rinse the base and make sure that the backing wall has been moistened. Spray or spread, with the smooth side of the plasterer’s trowel, a thin 5 mm. thick layer of BG thermal plaster over the plastered base and press on. Complete immediately with additional layers until the required thickness is obtained. Levelling and smoothing shall be carried out using a metal h-section bar and metal trowel. Applied layer thickness: 6 - 10 mm.

On the day following completion of the plastering, curing is to be started by moistening the plaster layer for three days consecutively, at least three times a day. In regions where the plaster dries quickly, curing is to be started on the same day. 

The following inspections shall be performed in all cases: Perpendicularity and flatness of plaster, adhesion of plaster system and thickness of layers. The cement plaster shall be inspected as specified in SI 1920 Part 2 and SI 1414 Part 1.

The  watertightness of the exterior plaster system is to be tested  prior to application of the final finishing layer, as specified in the section of SI 1476 Part 2 dealing with watertightness testing of walls, and the General Specification for Construction Works Section 05. Should sealing be required, a flexible cementitious seal in two layers shall be provided using BG Flexseal 160 or BG Readytop 701 over the protective plaster layer.   

The deviation from planarity of exterior plaster shall not exceed 5 mm. for each 2 mm.
The maximum deviation from perpendicularity of exterior plaster (in cm.) shall not exceed the height of the wall divided by 300.  

The overall thickness of all layers of the thermal plaster system shall not exceed 70 mm. on the walls. The  thickness of the layers covering the mesh shall not exceed 2 mm. The pull-off adhesive strength of the backing shall be at least 1 MPa.  The pull-off adhesive strength of the thermal plaster shall be at least 0.06 MPa for a single test.

The primer shall be applied 28 days following completion of the cement plaster application. Before proceeding with application, thoroughly clean from the surface of residues of paint, dust, concrete juices, loose bits, grease, or anything else liable to impair the absorbance of the material by the base. The material is not to be applied to a painted or coated base, and care is to be taken that the base  is completely dry. The primer is ready for use and only needs to be stirred beforehand.

Following stirring, the primer shall be applied using a brush or roller in a single layer until full coverage of the base is obtained. After applying the primer it is to be allowed to dry for 24 hours before application of coloured flexible stucco. The primer undercoat is not to be left for more than 5 days without a top system.

The BG decorative, flexible and coloured acrylic coating is ready for use and only needs light stirring before application.

Application shall be completed in a single day over an entire façade, or at least between the expansion joints or separating strips. At the same time the work should be inspected for visible signs of seams. The material shall be spread using a metal trowel and buffed with a plastic trowel until the desired texture is attained. “Buffing” may be carried horizontally, vertically, or in circular strokes to achieve the desired texture. The material’s “open time” is short (5 - 7 min.) so that the “buffing” operation must be performed immediately. When using flexible stucco with a texture of 100H, it is to be applied in two coats.    

• This specification sets out general points of emphasis and requirements for the employment of products used for exterior plastering with  thermal insulation and a flexible stucco finish - to the requirements of SI 1920 Part 2 for plaster and SI 1414 Part 1 for a building thermal insulation system. 
• This specification only applies to a reinforced concrete backing not embodying blocks or any cladding (such as polyester/polyesh sheets and the like).
• The thickness and type of thermal plaster shall be determined in accordance with the requirements of the relevant Standard - 1045 - and/or a thermal consultant. 
• This specification is no substitute for a work specification provided by a designer or consultant.
• Relevant Standards: 1920 for plaster; 1476 - Watertightness Test; 1414 Part 1 for thermal insulation; 1045 - Thermal Insulation.
• The Company’s Warranty is limited only to the nature and quality of the products, not applying to the manner of their employment or substituting for the installer’s responsibility.
• The installer is required to check the suitability of the product for the required application.
• We reserve the right to update or modify the data and recommendations without prior notice.
• In all events, this document shall not be such as to approve or recommend any deviation or exception from the regulations and laws of the State of Israel, especially the Planning and Development Law, 5725-1965 and Standards issued by the Standards Institute of Israel. 
• Likewise, this document is no substitute for inspection under the aforesaid Law and Regulations, nor does it constitute a reference for them.

• Before using any product listed in this specification, the technical sheet for the product should be consulted and adhered to.
• The thermal plaster shall be selected and the work performed to the requirements of SI 1920 Part 2 and SI 1414 Part 1.
• Flexible stucco is not to be applied if rain is forecast in the 72 hours before and following the application.
• Preparation of a whole bag of thermal plaster is mandatory.
• The thermal plaster contains polystyrene flakes and should therefore be shielded from wind during preparation.
• The BG Bond Ltd. Technical Department should be consulted before each application.
• Steel meshes shall be installed when the pull-out strength of the backing is less than that of the plaster system. Selection of the mesh and its manner of installation shall comply with SI 1920 Part 2.
• The retaining bars are to be removed following application of the plaster.
• Reinforcements and finishing details shall comply with a special specification and the appropriate Standard requirements.
• Fibreglass meshes shall be provided as part of the plaster system to the requirements of SI 1920 Part 2.
• It is mandatory to allow each layer to dry before proceeding with the next layer. The layer must be hard and dry through its entire thickness, not just its external surface, since covering a half fresh layer with a new layer above it will prevent the material from setting and impair the system.
• On completion of the work and at each stage as required, testing is to be performed to the relevant Standards and by means of a certified laboratory.    
• Water/polymer is not to be added to the mixture after it dries, and a dried mixture is not to be used.
• On completion of the work, wash hands and tools under running water.
• Skin and eyes are to be protected, avoiding direct contact with materials. In the event of contact, wash immediately under running water.
• The materials are inedible and should be kept out of the reach of children.
• For additional product safety information, contact BG Bond Ltd. to receive an SDS Safety Sheet.