How to Make Mortar with Fiberglass Mesh: A Step-by-Step Guide

I. Preparation Basis

1. ​Design Specifications
   • High-rise Cast-in-Place Concrete External Wall Insulation Composite Pouring System Atlas (Plastic Polymer Mortar & Fiberglass Mesh Crack Resistance Surface Layer) JS20-01
   • Technical Regulations for External Wall Insulation Construction (Polystyrene Board Fiberglass Mesh Polymer Mortar Method) DBJ/T-38-2002

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II. Construction Process Flow

1. ​Baseline Alignment
2. ​Surface Preparation
   • Clean/repair formwork removal defects
   • Seal penetrations (e.g., anchor bolts)
3. ​Primer Application
4. ​Mesh Installation
5. ​Mortar Layering
   • Base layer (2-3mm)
   • Surface layer (1-2mm)
6. ​Quality Inspection

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III. Key Construction Methods

A. Polystyrene Board Quality Control

Parameter	Allowable Deviation (mm)	Inspection Method
Surface Flatness	±3	2m straightedge + wedge feeler gauge
Verticality	±3	2m plumb line
Corner Alignment	±3	2m plumb line
Joint Height Difference	≤1.5	Steel ruler

B. Mortar Application

1. ​Material Preparation
   • Use factory-produced mortar with mechanical mixing ≥8 minutes
   • Rest for 10 minutes before secondary mixing (≥5 minutes)
   • Apply within 2 hours (no rehydration allowed)
2. ​Layer Construction
   • ​Base Layer: 2-3mm thickness, press mesh (horizontal overlap ≥100mm, vertical ≥80mm)
   • ​Surface Layer: 1-2mm, cover mesh edges
   • ​Total Thickness: 3-5mm
3. ​Critical Nodes
   • Door/window corners: Install 30×30×2000mm galvanized steel corner protectors
   • Expansion joints: Embed PE foam rods (1.3× joint width) with sealant

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IV. Quality Acceptance Standards

Parameter	Allowable Deviation (mm)	Inspection Method
Surface Flatness	≤4	2m straightedge + wedge
Verticality	≤5	Plumb line
Corner Squareness	≤4	200mm square

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V. Construction Precautions

1. ​Material Handling
   • Avoid overly thin mortar mixture
   • Soak mesh in water before installation
2. ​Workmanship
   • Maintain 80mm mesh overlap
   • Ensure 150mm corner mesh wrapping

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VI. Protection Measures

1. Protect finished surfaces from mechanical impact
2. Seal door/window gaps completely

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VII. Quality Assurance

1. Verify mortar and mesh certifications
2. Implement three-stage inspection system

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VIII. Safety & Compliance

1. PPE required: Helmets, safety harnesses (≥2m work)
2. Prohibit open flames near flammable materials