As buildings age, roofing systems inevitably face problems such as:
• water leakage
• UV degradation
• bitumen bleeding
• corrosion (for metal roofs)
Traditionally, roof replacement was the only solution — but today, roof renovation systems offer a more cost-effective and sustainable alternative.
Instead of tearing off the entire roof, modern renovation solutions allow you to:
👉 repair, restore, and upgrade existing roofs with minimal disruption
Why Roof Renovation Instead of Replacement?
Roof replacement is expensive, time-consuming, and disruptive.
In contrast, roof renovation systems provide:
✔ Cost Savings
Avoid full demolition and reconstruction
✔ Faster Installation
Shorter project timelines
✔ Sustainability
Reduce construction waste and environmental impact
✔ Performance Upgrade
Improve waterproofing, UV resistance, and energy efficiency
Types of Roofs Suitable for Renovation
1. Bitumen Roofs
Common issues:
• aging and cracking
• bitumen bleeding
• reduced waterproof performance
2. Metal Roofs
Common issues:
• corrosion
• joint leakage
• thermal expansion problems
👉 Both can be effectively restored using OYH roof renovation systems
OYH Roof Renovation System Overview
OYH provides integrated renovation solutions for both bitumen and metal roofs, combining:
• primers
• coatings
• membranes
System 1: Bitumen Roof Renovation
Key Challenge: Bitumen Bleeding
Old bitumen roofs often suffer from bitumen leaching, which affects coating adhesion and durability.
Solution: Primer + Coating System
🔹 Bitumen Bleed Blocking Primers
• YHPrimer-1000 (water-based epoxy sealer)
• YHPrimer-2000 (solvent-free epoxy sealer)
✔ Block bitumen migration
✔ Improve adhesion
✔ Provide stable substrate
🔹 Protective Top Coatings
• YHMScoat-8023 (silicone-modified polymer coating)
• YHColorWall-8108 (water-based PU coating)
• YHColorWall-5300 (water-based polymer coating)
✔ UV resistance
✔ waterproof performance
✔ weather durability
✔ eco-friendly (low VOC)
👉 Result:
Extended roof lifespan + improved waterproofing performance
System 2: Metal Roof Renovation
Metal roofs require solutions that address:
• thermal movement
• joint sealing
• corrosion protection
Solution Options
🔹 Sheet Membrane Solutions
• YHCoolRoof membrane series
✔ high flexibility
✔ excellent waterproofing
✔ heat resistance
✔ suitable for large areas
🔹 Liquid Coating Solutions
Non-bituminous coatings:
• YHMScoat-8023
• YHPUcoat-8108
• YHColorWall-5300
Bituminous coatings:
• YHBituRoof-4700 (water-based bitumen coating)
✔ easy application
✔ seamless waterproofing
✔ UV resistant
✔ fast drying
👉 Ideal for complex roof geometries and refurbishment projects.
Key Features of OYH Roof Renovation Products
✔ Easy Application
Suitable for on-site renovation with minimal equipment
✔ UV Resistance
Protects roofs from long-term sun exposure
✔ Low VOC & Eco-Friendly
Water-based systems reduce environmental impact
✔ Flexibility & Crack Bridging
Maintains performance under temperature changes (down to -40°C for membranes)
✔ Waterproof & Durable
Ensures long-term protection against leakage
How to Choose the Right Renovation Solution
Choose Membrane Systems when:
• large roof areas
• severe damage
• need long-term durability
Choose Liquid Coatings when:
• complex shapes
• local repairs
• quick renovation required
Always Use Primers when:
• bitumen bleeding exists
• substrate condition is poor
👉 A proper combination ensures maximum performance and lifespan.
Typical Applications
OYH roof renovation systems are widely used in:
• industrial buildings
• warehouses
• commercial centers
• residential buildings
• retrofit projects
Final Thoughts
Roof renovation is no longer just a repair — it is an upgrade strategy.
With the right system, you can:
• extend roof life
• improve waterproofing
• enhance energy efficiency
• reduce costs
👉 OYH provides complete, reliable, and easy-to-apply solutions for all types of roof renovation projects.
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