Roof Tiling: How-To Guide + How Many Roof Slates Per m²?

Thinking of tackling a roofing project or just curious about how many slates you’ll need? Whether you’re restoring a period property or starting from scratch, understanding the basics of roof tiling is essential. In this guide, we’ll walk you through how to tile a roof and answer one of the most common questions: “How many roof slates do I need per m²?”

Let’s get started!

Step-by-Step: How to Tile a Roof

Disclaimer: Roofing is a skilled trade that involves working at height. Always seek professional advice or hire a qualified roofer for larger projects.

1. Prepare Your Roof Structure

Before you lay any tiles or slates, your roof should have:

A solid structure (rafters or trusses)
A breathable membrane or felt for waterproofing
Tile battens fitted at regular intervals (these hold the tiles in place)

2. Choose the Right Roofing Materials

At Gardiners Reclaims, we stock both new and reclaimed roof tiles and slates, including:

Clay tiles
Concrete tiles
Eave tiles
Hip & valley tiles

Reclaimed slates are a fantastic option for matching older roofs and giving your project a timeless look.

3. Start Tiling from the Bottom Up

Always begin at the eaves (bottom edge) and work upwards in rows. This helps ensure water runs off efficiently.

4. Fix the Slates or Tiles

Each slate is typically nailed into place using copper or stainless steel nails. You may also need tile clips depending on the pitch and exposure of your roof.

5. Install Ridge Tiles & Finish Edges

Once all tiles or slates are in place, secure your ridge tiles along the top and add verge trims to protect the sides.

How Many Roof Slates Per m²?

This depends on the size of the slate and the lap (overlap) you’re using, but here’s a general guide:

Slate Size (mm)	Average Slates per m²
600 x 300	13 slates per m²
500 x 250	20–22 slates per m²
400 x 250	27–29 slates per m²
300 x 200	32–34 slates per m²

💡 Top Tip: Always add 5–10% extra for breakages and cuts, especially for reclaimed slate, which may vary slightly in size and shape.

Common FAQs

Q: Can I mix reclaimed and new roof slates?
A: You can, but it’s important to match size, thickness, and colour closely. Our team can help you source the perfect blend.

Q: Are reclaimed slates safe and weatherproof?
A: Yes! All our reclaimed slates are carefully selected and inspected for quality, ensuring they’re fit for purpose.

Q: Do you deliver roofing materials across the UK?
A: We sure do. We offer fast and reliable delivery throughout Stoke-on-Trent, Staffordshire, and nationwide.

Need Roof Slates or Help Measuring Up?

Whether you’re looking for reclaimed roof slates to match an existing build or new roof tiles for a modern finish, we’ve got you covered.

👉 Browse our roofing materials here
📞 Or call our team for expert advice on quantities, fitting, and delivery.