St Astier Novaskin Thermo Plus

SUBSTRATE PREPARATION

• Remove old plaster, stripping at least 2 cm from joints.
• Dub out or rebuild the existing substrate if necessary, using materials adapted to the existing masonry and compatible with the future rendering (cellular concrete excluded) and fill in any small holes with lime mortar.
• Treat the existing pathologies in the support if they exist (structural cracks, salpetre, etc).
• Make sure there is no efflorescence, dust or elements that may interfere with the adhesion of the mortar.
• Treat the wood, replace it or reconstitute it with resin if necessary, and protect it with geotextile or similar to separate it from the plaster. NOVASKIN® THERMO PLUS should not be in direct contact with wood.
• If necessary, passivate the metal parts of the substrate and protect them with geotextile or similar to separate them from the plaster. NOVASKIN® THERMO PLUS should not be in direct contact with metal.
• Protect lintels (wood, metal, etc.) of all kinds with felt or geotextile to separate them from the rendering.
• If necessary, create expansion joints every 16m2.
• The substrate must be thoroughly moistened and left to dry.

WATER ADDITION 

Water Dosage - 1 x 12kg bgas + 4.5 to 5 litres of water 

Mechanical Mixing - 5 to 8 minutes 

MIXING

Mix for 4 to 5 minutes with a whisk mixer (450 to 500 rpm). High-speed mixers (more than 500 rpm) are not recommended as they can over-mix the product and modify its performance. Manual mixing is not recommended.

APPLICATION

• Wall heads and window sills must be protected by an overhang, coping or similar , fitted with a device (water droplet) ensuring that rainwater is kept more than 30 mm away from the finishing render.
• NOVASKIN® THERMO PLUS mortar is applied manually in 4 cm passes as soon as the previous pass has firmed up.
• The total thickness applied should be 10 cm maximum.
• Leave a gap between the render at stress points (joinery stops, window sills, wooden posts, etc.) by creating a space in the total thickness of the rendering (3 mm maximum) and applying a flexible joint.
• Outside, the NOVASKIN® THERMO PLUS must be stopped 15 cm from the final ground level.
• Drying time : 7 days minimum.