Model #681(RTS-1) Slate: Spanish-Level Efficiency with More Competitive Pricing

Time is the biggest variable on any job site. If your roofing crew spends hours sorting through crate after crate of natural stone just to find matching thicknesses, your margins disappear fast.

For decades, roofing contractors across Europe (including the UK, France, and Germany) and North America have relied on traditional slate. While natural stone offers incredible character and durability, inconsistent grading creates serious labor delays.

At Redtree Slate (RTS), we approach natural stone from a practical installation perspective. As a direct quarry slate supplier, we produce standardized roofing slate designed to help contractors work faster, reduce waste, and protect their project profits.

Traditional slate installations often come with hidden costs. Older quarries or mixed-grade shipments deliver tiles with variable thickness, rough edges, and uneven corners.

Before a single tile hits the roof, your crew must perform extensive "dressing and sizing" on site:

Depending on the job size, pre-sorting can eat up hours or even full days of skilled labor before installation even begins. In a market where high labor rates eat away at fixed-bid contracts, manual sorting directly reduces roofing contractor profit. Every hour spent prepping material on the ground is an hour you are not billing for completed square footage.

We eliminate site pre-sorting by taking full control of the selection process at our own mine. Our operation in Shaanxi combines rich, high-density natural deposits with strict, standardized manual splitting and grading protocols.

Every piece of slate is hand-split by experienced craftsmen who understand the natural grain of Shaanxi stone. Before loading, our dedicated factory inspectors rigorously filter and sort the slates, eliminating uneven edges and wild thickness variations at the source. This ensures that every crate of Model 681 slate delivers pre-sized slate tiles with consistent dimensional tolerances.

When a crate arrives at your job site, the material is ready. Edge cuts are clean, lengths and widths are square, and thickness variance is kept to a tight, strict tolerance. Your crew spends less time inspecting stone and more time installing it.

Spanish slate has long been the default standard for modern European and North American projects because of its consistency. However, rising supply chain fees and raw material costs have squeezed contractor margins on Spanish stone.

Model #681 slate offers a direct alternative that delivers Spanish-level site efficiency at a significantly lower material cost.

Efficiency means nothing if the material fails over time. Model #681 achieves the highest international quality rating under BS EN 12326:

Less than 0.6% absorption, preventing freeze-thaw cracking in harsh winter conditions.

Excellent resistance to acid rain and environmental degradation.

No structural changes or surface rusting over extended temperature cycles.

High structural strength under wet conditions.

You get the reliable sizing of European slate with long-term weather resistance, backed directly by quarry-direct pricing.

For roofing contractors, speed on the job site directly drives business growth. When you install standardized roofing slate, the financial math shifts in your favor.

Consider the operational impact on a standard roofing project:

Your team opens the crate and carries material straight up the ladder.

Eliminating site preparation removes unnecessary non-productive hours, allowing your crew to focus purely on layout and fixing.

Consistent tile dimensions reduce unexpected delays, helping you keep labor costs under tight control across every contract.

When working on fixed-price contracts or per-square rates, faster and smoother installation directly increases your effective hourly margin while keeping job schedules predictable.

Yes. Model #681 slates can be factory pre-drilled to your specific gauge requirements (standard head-lap or custom spacing) before shipping, saving your crew even more time on site.

Our standard production holds thickness tightly within 5mm to 7mm. Through rigorous factory sorting and manual quality checks, thickness variance within a single crate is minimal, ensuring flat, clean laying lines across the roof.