Introduction to ACCO Engineering

ACCO Engineering is one of Pakistan’s leading engineering and construction companies, specializing in industrial, commercial, and residential steel structures. With decades of experience, we have successfully delivered hundreds of Pre-Engineered Buildings (PEB), warehouses, factories, and commercial structures in Lahore, Karachi, Islamabad, Faisalabad, Multan, and other major cities.

Our core services include:

• Pre-Engineered Buildings (PEB)

• Industrial & commercial sheds

• Steel roofing and cladding systems

• Turnkey construction solutions

• Civil, structural, and finishing works

At ACCO Engineering, our goal is to deliver durable, safe, and cost-effective steel structures that withstand Pakistan’s varied climates while minimizing long-term maintenance.

Why PEB Roofing Sheets Are Critical in Pakistan

PEB roofing sheets are more than just a protective cover—they directly influence structural integrity, lifespan, and maintenance costs.

In Pakistan, buildings face:

• Monsoon rains causing water accumulation and leaks

• Strong winds in coastal areas like Karachi and Gwadar

• High summer temperatures impacting metal expansion

• Industrial pollution in urban centers

Selecting the right material, thickness, coating, and installation method ensures your building remains durable, strong, and low-maintenance.

This guide explains types, installation methods, cost, benefits, and longevity factors of PEB roofing sheets in Pakistan.

1. Types of PEB Roofing Sheets

PEB roofing sheets differ based on material, coating, and insulation, each suited for specific applications.

A. Galvanized Steel Sheets

• Zinc-coated for corrosion resistance

• Cost-effective and widely used

• Suitable for moderate climates and industrial zones

B. Galvalume Sheets (Zinc-Aluminum Coating)

• AZ150/AZ200 coatings for superior corrosion resistance

• Ideal for coastal areas and high-humidity zones

• Lifespan: 50–70 years

C. Sandwich Panels (Insulated Roofing Sheets)

• Steel + insulation layers (PUF or EPS)

• Provides thermal and sound insulation

• Recommended for cold storage, factories, and offices

D. Color-Coated PPGI Sheets

• Pre-painted for aesthetic appeal

• Resistant to corrosion and fading

• Popular in commercial and residential buildings

2. How PEB Roofing Sheets Influence Structural Strength

A. Load Distribution

• Transfers wind, rain, and snow loads to purlins and rafters

• Ensures roof stability under extreme conditions

B. Rigidity and Deflection Control

• Interlocking profiles like trapezoidal or standing seam improve rigidity

• Reduces sagging under heavy loads

C. Connection Quality

• Bolted or self-drilling screw connections are essential

• Poor connections weaken structural integrity

D. Span Capability

• High-strength sheets allow longer spans without intermediate supports

• Increases usable interior space for industrial operations

3. Factors Affecting Longevity of PEB Roofing Sheets

A. Material Quality

• High-tensile steel resists bending and environmental stress

• Low-quality steel corrodes quickly in humid or industrial areas

B. Coating & Corrosion Protection

• Galvalume or zinc coatings prevent rust

• Repainting or protective films enhance lifespan

C. Sheet Thickness

• Standard: 0.47–0.53 mm for industrial roofs

• Thicker sheets provide better wind, hail, and load resistance

D. Environmental Exposure

• Coastal cities: High salt content in air accelerates corrosion

• Industrial zones: Protective coatings prevent chemical or dust-related damage

E. Regular Maintenance

• Annual inspection prevents debris buildup

• Repair scratches or leaks immediately to prevent corrosion

4. Installation Best Practices for Maximum Longevity

• Correct fastening with EPDM washers

• Proper sheet overlap to prevent water ingress

• Align purlins and rafters for even load distribution

• Apply sealants at joints for waterproofing

• Follow manufacturer’s specifications for slope and spacing

5. Cost vs Durability Analysis

Insight: High-quality PEB sheets may cost more upfront but reduce long-term maintenance and increase lifespan.

6. Pros & Cons of PEB Roofing Sheets

✅ Advantages

• 💠 High structural strength

• 💠 Long-lasting with anti-corrosion coating

• 💠 Quick and easy installation

• 💠 Supports wide spans with minimal columns

• 💠 Modular and expandable for future growth

• 💠 Reduces long-term maintenance costs

• 💠 Suitable for industrial, commercial, and residential projects

❌ Disadvantages

• ❌ Higher initial investment for premium sheets

• ❌ Requires skilled labor for installation

• ❌ Improper maintenance reduces lifespan

• ❌ Low-quality sheets may rust quickly

7. Frequently Asked Questions (FAQs)

1. What is the best PEB roofing sheet for coastal areas?
Galvalume sheets (AZ150/AZ200) provide excellent corrosion resistance.

2. How long do PEB roofing sheets last?
High-quality sheets last 50–70 years with proper maintenance.

3. Do thicker sheets provide better structural strength?
Yes, thicker sheets resist sagging, wind, and hail better than thinner sheets.

4. Can PEB roofing sheets be insulated?
Yes, sandwich panels with PU/EPS cores offer thermal and sound insulation.

5. How often should PEB roofs be inspected?
Annual inspections are recommended, especially after monsoon or storms.

8. Environmental & Industry Considerations in Pakistan

• Monsoon rains: Require proper slope and drainage to avoid leaks

• Coastal winds: Galvalume or pre-painted sheets reduce corrosion risk

• Industrial areas: Protective coatings prevent chemical or dust-related damage

• Temperature variations: Insulated sheets regulate interior temperature and reduce energy costs

9. Internal Links (ACCO Engineering Website)

• House Construction in DHA Lahore

• Commercial Plaza Builders Lahore

• Industrial Shed Construction Pakistan

• PEB Steel Structure Services ACCO Engineering

10. External Authority Links

• Pakistan Building Code – Seismic Provisions

• construction.gov.pk – Standards & Guidelines

• ArchDaily – Steel Building Trends

• DAWN Business – Industrial Growth in Pakistan

11. Final Verdict

PEB roofing sheets are critical for structural strength and longevity in industrial and commercial buildings. By choosing high-quality material, proper coating, correct installation, and regular maintenance, you ensure:

• Long-lasting buildings

• Lower maintenance costs

• Resistance to wind, rain, and seismic activity

• Energy efficiency and aesthetic appeal

ACCO Engineering provides expert PEB design, fabrication, and installation across Pakistan, helping clients build strong and durable steel structures.

12. Call to Action (CTA)

Contact ACCO Engineering today for a free consultation on PEB roofing sheets and steel building projects!

• Phone / WhatsApp: 0322 8000190

• Email: info@acco.com.pk

• Website: www.accoengineering.com