Existing Pebbledash Render System
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Existing Pebbledash Render System

Existing Pebbledash Substrate Silicone or Acrylic Finish
System Build-Up

Layer-by-layer system specification

The Existing Pebbledash Render System is Licata's specification for over-rendering existing pebbledash. Pebbledash presents an uneven substrate, so a levelling coat using Licacem 200 or Licacem Fibro is applied first to fill the texture and create a flat surface, with the product selection based on the condition of the existing pebbledash.

Raso R140 or Raso W160 can be specified as the basecoat. The finish can be Siloxan Color silicone render or Lerici acrylic render depending on performance and budget requirements.

Existing Pebbledash Render System Build-Up
System Layers

Products

1
Layer 1: Substrate
Existing Pebbledash
Existing pebbledash substrate. Must be structurally sound, well bonded and free from hollow sections, contamination and organic growth. Hack off any loose or delaminating areas and make good before proceeding. Treat any mould or algae with biocide.
2
Layer 2: Levelling Coat
Licacem 200 or Licacem Fibro
Licacem 200 is a cementitious levelling mortar applied to fill the pebbledash texture and create a flat surface for the basecoat. Licacem Fibro is a fibre-reinforced version suited to substrates in poorer condition or where additional crack resistance is required. Product selection based on the condition of the existing pebbledash.
⚠ Requirement based on the condition of the substrate
Licacem 200 Licacem Fibro
3
Layer 3: Basecoat
Raso R140 or Raso W160
Raso R140 is a polymer-modified cementitious basecoat suitable for application over the levelled pebbledash surface. Raso W160 is a lightweight polymer-modified alternative. Apply to the required thickness and embed the fibreglass mesh whilst still fresh.
Raso R140 Raso W160
4
Layer 4: Reinforcement
Fibreglass Mesh
Alkali-resistant fibreglass reinforcement mesh, embedded into the fresh basecoat. Minimum 100mm laps at all joints. Apply additional diagonal mesh at all openings and corners to prevent cracking.
Fibreglass Mesh
5
Layer 5: Topcoat Primer
Isolante LG
Silicone-based topcoat primer, applied over the fully cured basecoat to consolidate the surface and provide uniform, controlled absorption for the render finish.
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6
Layer 6: Render Finish
Siloxan Color or Lerici
Siloxan Color silicone render: highly water-repellent, breathable, anti-mould, with a wide colour range. Lerici acrylic render: cost-effective and durable, with a wide range of textures and colours.
Siloxan Color Lerici
Products in This System

Full system, supplied by Licata

Licacem 200

Licacem 200

Cementitious levelling mortar. Fills pebbledash texture and creates a flat surface for the basecoat.

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Licacem Fibro

Licacem Fibro

Fibre-reinforced levelling mortar. For substrates in poorer condition requiring additional crack resistance.

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Raso R140

Raso R140

Polymer-modified basecoat. Layer 3 option for over-pebbledash applications.

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Raso W160

Raso W160

Lightweight polymer-modified basecoat. Layer 3 alternative option.

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Isolante LG

Isolante LG

Silicone topcoat primer. Consolidates the basecoat and controls absorption for the render finish.

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Siloxan Color

Siloxan Color

Silicone render finish. Water-repellent, breathable, anti-mould. Layer 6 option.

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Lerici

Lerici

Acrylic render finish. Durable, with a wide colour and texture range. Layer 6 option.

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Specify this render system

Contact our technical team for product quantities, NBS specification clauses and project-specific advice.

Contact Technical Team All Render Systems