1. Introduction
Just 48 hours ago, the U.S. Green Building Council announced updated LEED v5 guidelines that now give extra credits for using recycled-content metal cladding systems—sparking renewed interest in metal clad siding among eco-conscious builders. If you’re considering a modern, durable exterior for your home or shed, metal clad is a top contender. But knowing how to properly install and maintain it makes all the difference between a sleek finish and costly repairs down the line.
Metal clad isn’t just one thing—it’s a family of solutions: from corrugated steel facades and zinc clad dormers to vertical standing seam metal siding and corten steel siding. Whether you’re building a metal clad house, upgrading a metal clad shed, or replacing old weatherboards with metal weatherboard alternatives, this step-by-step guide covers everything you need.
2. Choose the Right Type of Metal Clad
Not all clad metals are created equal. Your choice depends on climate, budget, and aesthetic goals.
- Corten steel siding offers a rustic, rust-finished look but comes with a higher upfront cost (corten siding cost averages $8–$12/sq ft).
- Zinc metal siding and zinc facade systems provide self-healing patinas and last 80+ years.
- Aluminum clad steel or stainless clad aluminum blends strength with corrosion resistance.
- For budget-friendly projects, exterior corrugated metal siding or Colorbond standing seam panels deliver great value.
Also consider specialized options like PAC Clad standing seam roofs or PAC Clad column covers if you’re matching existing architectural elements.
3. Prepare the Wall Surface
A clean, level substrate is non-negotiable. Remove old siding, inspect sheathing for rot or moisture damage, and install a high-quality weather-resistive barrier (WRB). This prevents condensation behind your metal clad wall and extends its life.
If you’re retrofitting over wood framing, ensure furring strips are installed vertically to create an air gap—critical for drainage and drying. Never attach metal siding directly to masonry without proper isolation.
4. Measure, Cut, and Handle Panels Safely
Use aviation snips or a metal shear for clean cuts—never angle grinders, which can damage protective coatings. When cutting aluminum clad sheet or stainless steel plate, wear gloves and eye protection.
Store panels flat and covered until installation. Avoid dragging them across rough surfaces to prevent scratches that compromise corrosion resistance.
5. Install the Metal Clad Siding
Start at the bottom corner and work upward. Use corrosion-resistant fasteners (stainless or coated) designed specifically for metal siding.
For standing seam systems like vertical standing seam metal siding or PAC Clad HWP, follow manufacturer specs for clip spacing—typically every 12 to 24 inches. Over-tightening causes oil-canning (waviness).
Leave expansion gaps (usually 1/8 inch per 10 feet) to accommodate thermal movement—especially important with aluminum clad steel or copper siding in hot climates.
Don’t forget trim details: PAC Clad coping and corner pieces ensure clean transitions and water shedding.
6. Seal Joints and Penetrations
Use compatible sealants at seams, windows, and utility penetrations. But avoid over-sealing—metal needs to breathe. Flashing should direct water away, not trap it.
For electrical or plumbing runs through a metal clad wall, use grommets or insulated bushings to prevent chafing on metal clad electrical wire or aluminum clad pipe insulation.
7. Maintain Your Metal Clad Exterior
Most metal clad siding requires minimal upkeep. Rinse annually with a garden hose to remove dust and pollutants.
For tougher grime, use mild soap and a soft brush—never abrasive pads or acid-based cleaners, especially on zinc or copper siding.
Inspect fasteners and seams every 2–3 years. Tighten loose screws and replace any that show signs of galvanic corrosion (common where dissimilar metals like aluminum and steel meet).
Corten steel siding will develop its signature rust layer naturally—don’t paint or seal it unless specified by the manufacturer.
8. Troubleshooting Common Issues
Problem: Oil-canning (ripples in flat panels). Solution: Ensure proper fastener tension and use stiffened panel profiles.
Problem: Rust streaks on light-colored siding. Cause: Often from nearby uncoated steel plate or fasteners. Fix: Replace with stainless or coated hardware.
Problem: Condensation behind siding. Cause: Missing or damaged WRB. Remedy: Reinstall with proper vapor-permeable barrier.
9. Conclusion
Installing metal clad siding correctly transforms your home into a low-maintenance, weather-resistant, and visually striking structure. Whether you choose a corten steel facade for industrial charm or a sleek zinc clad roof for timeless elegance, following these practical steps ensures longevity and performance. With sustainability trends accelerating—and new incentives for recycled-content materials like clad metal meaning ‘eco-smart’—now’s the perfect time to go metal.
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