When choosing metal sheets and covers for a chimney chase, you want durable materials that resist rust, heat, and weather while fitting your exact chimney dimensions. This guide highlights five metal products that are well-suited for fireplace chimney chase applications, with notes on who each product is best for and practical buying considerations. It focuses on weather resistance, ease of fabrication, and compatibility with common chase sizes. The buyer is typically a homeowner or contractor seeking a long-lasting solution with straightforward installation.
| Product | Best For | Key Benefit |
|---|---|---|
| Universal Custom Chimney Chase Cover, Stainless Steel, 30″ x 48″ | Direct replacement for standard 30″ x 48″ chases | Heavy-duty corrosion resistance and configurable sizing |
| 11228 Galvanized Sheet, 24″ x 30″ | Budget-friendly, smaller projects | Galvanized steel sheet for general用途 |
| Aluminum Flashing Roll 4″ x 11′ (28 gauge) | Leak prevention around roofs and chimneys | Lightweight aluminum with rust resistance |
| MD Building Galvanized Steel Sheet, 24″ x 36″ | Outdoor projects with steel sheet needs | Durable galvanized steel sheet for general use |
| MD Building Mill Aluminum Sheet, 36″ x 36″ | Versatile DIY projects and custom fabrication | Corrosion resistance and easy fabrication |
Universal Custom Chimney Chase Cover, Stainless Steel

Best for: homeowners seeking a precise fit for a 30″ x 48″ chase. This heavy-duty stainless steel cover is designed for long-lasting rust and weather resistance. It can be modified by the quarter inch to align with specific dimensions, and it includes adjustable collar and skirt heights. Don’t forget to confirm hole size requirements after ordering to match your venting pipe.
Why chosen: The product prioritizes durability and customization, making installation straightforward for typical chase configurations. It avoids holes unless needed and offers a no-drill approach with appropriate drift and cross-break features to help seal against moisture. Warning: hole size needs confirmation post-purchase to ensure a proper seal.
Best for buyer type: Those with a standard 30″ x 48″ chase seeking a robust, configurable cover with weather protection and easy post-purchase sizing adjustments.
11228 Galvanized Sheet, 24 x 30″

Best for: budget-conscious projects or smaller chase repairs that require a simple galvanized surface. This sheet material provides solid structural steel-based support and is suited for cut-to-fit fabrication in outdoor settings.
Why chosen: Galvanized sheet offers corrosion resistance for outdoor use and provides a straightforward substrate for custom bending or welding. Limitation: data indicates it should not be welded in some cases; confirm welding plans with a fabricator before use.
Best for buyer type: DIYers or pros seeking a cost-effective sheet with basic galvanization for general outdoor application.
Aluminum Flashing Roll 4″×11′ (28 Gauge)

Best for: flashing and leak prevention around chimneys, roofs, vents, and windows. The 0.3mm (28 gauge) aluminum roll provides a long-lasting, watertight barrier in weather-exposed areas.
Why chosen: Aluminum resists rust, is easy to form, and provides effective leak prevention. Limitation: a single flashing roll may require multiple lengths to cover larger areas or complex corners.
Best for buyer type: Homeowners and contractors performing weatherproofing tasks where lightweight, flexible metal is advantageous.
MD Building Galvanized Steel Sheet, 24×36

Best for: outdoor or indoor projects needing a sturdy steel sheet option. The 24″ x 36″ sheet is ready for fabrication into chase components or brackets and supports various assembly methods.
Why chosen: Galvanized steel offers durability and corrosion resistance for longer-term outdoor performance. Limitation: no mention of hole sizes or perforations; fabrication will be required for complex shapes.
Best for buyer type: Pros or DIYers who plan to fabricate larger metal pieces for chimney chase support structures.
MD Building Mill Aluminum Sheet, Paintable, 36″×36″

Best for: versatile DIY projects that require printable surfaces and large sheet area. The 36″ x 36″ aluminum sheet is paintable and well-suited for custom chase panels or decorative elements.
Why chosen: Aluminum provides corrosion resistance, ease of fabrication, and a paintable finish for aesthetic matches to home exteriors. Limitation: aluminum’s soft nature may require careful handling for sharp edges during shaping.
Best for buyer type: DIY enthusiasts and professionals needing a flexible, paint-ready sheet for custom chimney chase components.
Buying Guide: Key Considerations for Fireplace Chimney Chase Covers and Sheets
- Material choice: Stainless steel offers the strongest corrosion resistance; galvanized steel provides durability at a lower cost; aluminum is lightweight and easily fabricated but softer.
- Sheet size and customization: Confirm exact chase dimensions (width, height, and any required hole sizes). Some products allow quarter-inch modifications or hole sizing after purchase.
- Weatherproofing: Look for components with drip edges, cross breaks, and good sealants compatibility to prevent moisture intrusion.
- Fabrication needs: Depending on your project, you may need to cut, bend, or drill; ensure the material and thickness suit your tools and skills.
- Installation considerations: Determine whether you’llMax need flashing, collars, skirts, or separate flashing rolls to achieve a watertight fit.
- Installation environment: Outdoor exposure, salt air, or extreme temperatures may affect material longevity; choose accordingly.
FAQ
- What material lasts longest for chimney chase covers?
– Stainless steel generally offers the best long-term rust and weather resistance, followed by galvanized steel and aluminum depending on environment. - Do I need a specific hole size for my chimney pipe?
– Yes. Some products require confirming hole size after ordering to fit your venting pipe exactly. - Can galvanized sheets be welded?
– Some galvanized sheets should not be welded; check product notes and consult a fabricator before welding. - Is aluminum suitable for all chase applications?
– Aluminum is lightweight and corrosion-resistant but can be softer; it is best for lighter-duty fabrication and areas with less structural stress. - Should I use flashing rolls with a chase cover?
– Flashing rolls help seal around roofs and chimneys; they are effective when used with proper installation practices to prevent leaks.