Blue Slate Chippings 40mm, 20kg Bag, Flat Angular Decorative Slate

Slate chippings are one of the easiest ways to finish a border or path so it looks smart all year and needs very little upkeep. These are 40mm blue slate chippings, a flat, angular decorative aggregate of Welsh slate, supplied in 20kg bags. The colour is a true blue with subtle variations, and it deepens dramatically when wet. The flat pieces lock together and lie flat, so they make a stable, well-draining surface. Homeowners, garden designers and landscapers use them for borders and beds, paths, patios, rockeries, alpine dressings, ponds and water features.

Why it works

Low maintenance

Laid at the right depth over a weed control membrane, slate chippings suppress weeds and need no mowing, watering or edging. A rake now and then keeps the surface even.

Flat, angular pieces

The flat, angular shape means pieces overlap and lie flat rather than rolling like round pebbles. A 40mm grade is large enough to stay put in borders and to show the layered texture of the slate.

Colour that changes with the weather

Dry, the slate is a true blue with subtle variations. Wet, the colour deepens dramatically, which is why it is popular around ponds and water features where it is often damp.

Well draining

Water runs straight through the chippings rather than pooling, so beds and paths stay free draining.

Natural stone, natural variation

Slate is a natural stone, so every bag varies a little in colour and in the size of individual pieces. A 40mm nominal grade means most pieces are around that size, with some smaller and some larger. Mixing bags as you spread them gives the most even finish across a large area.

Where it's used

• Garden borders and beds
• Footpaths and patio surrounds
• Rockeries and dressing for alpines
• Ponds, aquatics and water features

Specifications

Choosing the right option

This listing is a single product: 40mm blue slate in 20kg bags. The choice is how many bags you need.

The supplier recommends laying at around 50mm to 60mm deep. Coverage per bag is not published for this line, as slate packs differently depending on the shape of the pieces. Measure your area in square metres and allow for the full depth. If you are unsure, order a few bags for a small test area first.

The 40mm grade suits borders, beds, water features and decorative areas. For paths and areas that are walked on every day, lay it over a firm, compacted base and a membrane so it stays level.

Installation, use & care

Clear weeds and level the ground. Lay a weed control membrane and pin it down. Spread the chippings evenly to around 50mm to 60mm deep and rake them level. Use edging to keep the slate out of lawns. Top up thin spots and rake over each spring.

FAQ

How deep should I lay them?

The supplier recommends around 50mm to 60mm.

Will the colour change?

Yes. The blue deepens dramatically when the slate is wet.

Can I walk on them?

Yes, they are used on footpaths. Lay them over a firm base and membrane for paths.

Will every bag look the same?

Slate is natural, so colour and piece size vary slightly between bags. Mix bags as you spread for an even finish.

How many bags do I need?

Coverage per bag is not published. Measure the area and allow for a 50mm to 60mm depth.

Ordering & delivery

Sold in 20kg bags, priced per bag. A minimum order of 15 bags applies, shown when you add to basket. Aggregates are heavy, so delivery charges and lead times are shown at checkout.