Sourcing the Best Roof Slate

Choosing the right roof slate can be daunting, with options varying significantly in quality and cost. This guide, inspired by Ashbrook Roofing's comprehensive presentation, will help you navigate the complexities of sourcing the best slate for your roofing project.

The Basics of Roof Slate

Roof slate may look simple – grey, rectangular, with two nail holes – but its quality varies based on its origin and manufacturing process. Different slates offer different levels of durability, ease of installation, and aesthetic appeal.

Understanding Slate Manufacturing

The manufacturing of slate remains largely traditional. Large boulders are extracted, cut into blocks, and split by hand into thin slates. These are then graded:

1. 1st Grade: Flattest, smoothest, and thinnest. Easier to install but more expensive.
2. 2nd Grade: More uneven, harder to install, higher wastage.
3. Heavy Grade: Thick and textured, adding character but also difficulty in installation.

The picture below shows an SSQ Riverstone heavy slate rood,

Geographic Differences

Slates from different regions come with their own general qualities:

• Welsh and Canadian: Highly durable and aesthetically pleasing.
• Spanish: Variable, with some grades matching high-quality Welsh slates.
• Chinese and Brazilian: Often more problematic, with higher risk of defects.

The image below shows a Spanish Slate Roof.

Key Considerations in Slate Selection

1. Hardness: Softer slates are easier to work with, while harder slates can be brittle.
2. Inclusions/Pyrites: Non-reactive pyrites are harmless, but reactive ones can cause rust and discolouration.
3. Appearance: Colour stability and texture are crucial. For instance, some Chinese slates may fade quickly.
4. Certification: Ensures minimal water absorption, stability under thermal cycling, and resistance to pollution.

Balancing Cost and Value

Cheap slates can lead to long-term issues. Investing in better quality, such as high-grade Spanish slate, can offer a good balance of cost and durability. Consulting roofing specialists can help you make an informed decision.

Conclusion

Selecting the right roof slate involves considering various factors from origin to certification. For the best results, align your choice with the specific needs of your project and seek advice from professionals.

For a more detailed understanding, visit Ashbrook Roofing's Presentation.

Here at Ashbrook Roofing we sell a large range of quality new and used slate. To see what we have to offer: Click here

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