How Long Do Polycarbonate Sheets Last? Expected Lifespan & Durability
Learn what determines the lifespan of Lexan polycarbonate sheets and how to maximize their durability.
Expected Lifespan of Polycarbonate
Typical Lifespan by Application:
- Outdoor roofing with UV protection: 10-20 years
- Premium UV-protected sheets: 15-25+ years
- Indoor applications: 20-30+ years
- Without UV protection (outdoor): 2-5 years before yellowing/brittleness
What Affects Polycarbonate Lifespan?
1. UV Protection (Most Critical)
UV radiation is the #1 enemy of polycarbonate. Without protection, polycarbonate yellows, becomes brittle, and loses impact resistance within 2-5 years.
The good news: All polycarbonate sheets from Plastics Canada include UV coating as standard, providing 10+ years of outdoor protection.
2. Climate and Weather Exposure
- Cold climates: Polycarbonate performs excellently in Canadian winters (rated to -40°C)
- Hot climates: High UV exposure accelerates aging; UV protection is critical
- Coastal areas: Salt spray has minimal effect on polycarbonate
- Hail-prone areas: Polycarbonate's impact resistance means hail damage is extremely rare
3. Thickness and Quality
Thicker sheets (6mm vs 3mm) generally last longer because they have more material to lose before structural integrity is compromised. Premium brands like Lexan and Makrolon outlast generic alternatives.
4. Proper Installation
Proper installation dramatically extends lifespan:
- Allow for expansion: Polycarbonate expands with heat; fasteners should have room for movement
- Use compatible fasteners: Rubber or neoprene washers prevent stress cracks
- Proper edge sealing: Prevents moisture infiltration in multiwall sheets
- Correct slope: Ensures water drainage and prevents pooling
5. Maintenance and Cleaning
Regular gentle maintenance extends polycarbonate life:
- Clean with mild soap and water (never harsh chemicals)
- Remove debris that could trap moisture
- Inspect fasteners annually for loosening
- Apply UV renewal coating every 5-7 years (optional but beneficial)
Signs Your Polycarbonate Is Aging
Watch for these indicators that replacement may be needed:
- Yellowing or discoloration: Indicates UV protection is depleting
- Brittleness: Material cracks easily when pressed
- Surface crazing: Fine cracks across the surface
- Loss of clarity: Hazy appearance that doesn't clean off
Polycarbonate vs Other Materials: Longevity Comparison
| Material | Outdoor Lifespan | Notes |
|---|---|---|
| UV-Protected Polycarbonate | 10-20 years | Best for impact resistance |
| Acrylic (Plexiglass) | 7-10 years | Better clarity but more brittle |
| Fiberglass Panels | 10-15 years | Yellows significantly over time |
| PVC Panels | 5-8 years | Cheapest but shortest lifespan |
| Tempered Glass | 20+ years | Most durable but breakable |
Maximizing Your Polycarbonate's Lifespan
- Always choose UV-protected sheets for outdoor use
- Follow manufacturer installation guidelines for expansion gaps
- Clean gently 2-3 times per year with soap and water
- Use proper fasteners with rubber washers
- Inspect annually for damage or loosening
- Consider recoating with UV protection after 8-10 years
Warranty and Quality Assurance
Premium polycarbonate brands like Lexan and Makrolon typically offer:
- 10-year warranties against yellowing and loss of light transmission
- Quality guarantees on UV coating durability
- Impact resistance certification for safety applications
The Bottom Line
With proper UV protection and installation, polycarbonate roofing and glazing should last 10-20 years with minimal maintenance. This makes it one of the most durable and cost-effective materials for outdoor applications - especially considering its unmatched impact resistance and weather tolerance.