Blue Slate - 40mm - Long Rake Spar

Name: Blue Slate - 40mm - Long Rake Spar
Brand: Long Rake Spar
SKU: bv46rscxkh
Availability: InStock

The Long Rake Spar 40mm Blue Slate delivers natural beauty and functional versatility for landscap...

Best current price£188.49from B&Q

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Product Information

Full details

The Long Rake Spar 40mm Blue Slate is an ideal choice for landscapers and homeowners looking to enhance pathways, rockeries, and aquatic features with natural, durable materials. Its standout feature is its chameleon-like appearance, shifting from a subtle grey when dry to vibrant blue, purple, and green tones when wet, adding visual depth to any garden. While its angular, flat profile provides excellent coverage for borders, users should note that the natural source means individual pieces will vary significantly in shape, size, and hue, requiring a flexible approach to design.

All features

Model Part Number	SLAB40IBC
Brand	Long Rake Spar

Extended Product Information

FAQs

Is this slate safe for koi ponds?

Yes, the material is fish-friendly and safe for use in aquatic environments, including koi ponds.

Does the colour change permanently?

No, the colour change is a physical response to water saturation; once the stone dries out, it will return to its original grey/muted tone.

Can I use this for a high-traffic driveway?

The 40mm size is generally intended for decorative borders, pathways, and rockeries rather than heavy-traffic vehicle driveways.

Will weeds grow through the slate?

To minimize weeds, always install a landscape membrane under the slate, though some airborne seeds may occasionally take root in debris on top.

Is every bag identical in colour?

As a natural product sourced from multiple quarries, some variation in colour and shape between batches is expected and considered part of the natural aesthetic.

Troubleshooting

Stone appears dull or grey

The slate shows its most vibrant blue and purple hues when wet; try watering the area or wait for rain to see the full colour spectrum.

Stones are sinking into the soil

Ensure a landscape fabric or weed membrane has been laid beneath the slate to provide a stable foundation and prevent ground migration.

Excessive dust on stones upon delivery

This is common for natural slate products; a simple rinse with a garden hose will remove surface dust and prepare the stones for installation.

Pros and Cons

Pros

Striking colour variation provides visual interest in both dry and wet conditions
Suitable for aquatic environments including fish ponds
Durable, natural material that holds up well against weather
Large 40mm size is perfect for weed suppression in borders
Sustainable, recycled material construction

Cons

Significant natural variation between batches in terms of colour and shape
Larger 40mm size may be uncomfortable for bare feet on main walkways
Slate can become slippery when wet, requiring caution in steep areas

Setup, Compatibility & Care

To ensure the best results, clear the target area of weeds and loose debris before laying the slate. For pathway applications, it is highly recommended to install a heavy-duty landscape membrane underneath to prevent weed growth and keep the slate from being pressed into the sub-soil.

When using in aquatic features, give the slate a thorough rinse with clean water to remove any dust accumulated during transit or bagging, ensuring the pond water remains clear. As a natural product, the slate requires minimal maintenance; occasionally clearing leaves or debris from the surface will keep the colour profile visible. Avoid using harsh chemical cleaners, as natural rainwater is typically sufficient to refresh the look of the stone.