Second hand roof slates, also known as reclaimed or reused slate, offer a durable, sustainable option for homeowners. This article explains what reclaimed slate is, why it matters for roofing projects, and how to source, inspect, install, and maintain second hand roof slates in the United States. Readers will learn about benefits, potential risks, and practical tips to ensure a lasting, code-compliant roof.
What Are Second Hand Roof Slates?
Second hand roof slates are slates salvaged from older buildings, factories, or demolished structures and repurposed for new roofing. Reclaimed slate is valued for its natural durability, attractive appearance, and environmental benefits since it reduces waste and the demand for new quarry material. Reused slate typically comes in common sizes and thicknesses similar to new slates, but variations in mineral content, lead times, and condition must be considered. Quality depends on the slate’s weathering, thickness, and the integrity of existing nail holes or fixing points.
Advantages And Considerations
- Durability and longevity: Reclaimed slate can match or exceed the lifespan of new roofing when properly installed and maintained.
- Environmental impact: Using second hand slates reduces quarrying, lowers embodied energy, and minimizes waste in landfills.
- Aesthetics: Reclaimed slate often provides a distinctive patina and color variation that some homeowners find appealing.
- Cost dynamics: Initial costs may be lower than premium new slate, but careful assessment is needed due to potential handling and installation challenges.
- Quality risks: Brittle edges, hairline cracks, or hidden damage can compromise performance if not identified before installation.
- Compatibility: Verify slate thickness, hook holes, and alignment with existing roof structure to avoid wind uplift and water intrusion.
Critical considerations include weather resistance, local wind uplift requirements, code compliance, and the size match between reclaimed slates and existing roofing patterns. A professional roofer should assess the roof deck, flashing, ventilation, and underlayment compatibility with reclaimed materials.
How To Source And Inspect Reclaimed Slates
- Trusted suppliers: Work with reputable reclamation yards, slate specialists, or certified installers who document origin, thickness, and condition.
- Condition checks: Inspect for cracks, chips, cupping, or delamination. Test a sample piece for breakage under light pressure; slate should be strong and not crumble easily.
- Thickness and size: Ensure consistent thickness and dimensions to fit existing fixings and nails. Common thickness ranges vary; confirm with the installer.
- Fixings and compatibility: Confirm nail holes line up with battens or that new fixings can be used without compromising weatherproofing.
- Color and texture consistency: Decide if slight color variation aligns with the project’s aesthetic goals; some variation is natural in reclaimed slate.
- Warranty and documentation: Obtain documentation on origin, treatment, and any warranty terms offered by the supplier or installer.
Installation And Maintenance Tips
- Professional assessment: Engage a roofer experienced with reclaimed slate to evaluate structural compatibility and wind load requirements.
- Deck and underlayment: Inspect or replace the roof deck and ensure a suitable underlayment, as reclaimed slates may require specific moisture barriers.
- Cutting and fitting: Reclaimed slates may need careful cutting with appropriate tools to maintain integrity without causing cracking.
- Fixing method: Use compatible nails or hooks and ensure proper head exposure to achieve secure fixing and weather resistance.
- Ventilation: Maintain adequate roof ventilation to prevent moisture buildup and extend slate life.
- Maintenance plan: Schedule regular inspections after extreme weather, and replace damaged slates promptly to prevent leaks.
Cost, Environmental Impact, And Warranty
Second hand roof slates can offer a favorable balance of cost and performance, particularly on larger projects or historic restorations. While per-square costs may be lower than premium new slate, labor and handling add to the total. Environmental benefits include reduced quarrying, energy use, and waste. Warranty terms vary by supplier and installer and may cover slate condition at installation or a limited period of coverage for structural performance. Homeowners should demand clear warranty details and maintenance guidance to maximize the return on investment.
Practical Steps To Take Before Installing
- Get multiple quotes: Compare price quotes, installation timelines, and warranty terms from experienced reclaimed slate specialists.
- Request a site assessment: Have a roofer assess roof geometry, wind uplift, and drainage to ensure reclaimed slates will perform under local conditions.
- Check local regulations: Confirm building codes and permit requirements for reclaimed slate roofing in the area.
- Plan for disposal: Clarify how waste from damaged slates will be managed and whether surplus reclaimed slates can be returned to the supplier.