Excelente producto para impermeabilizar una fisura en la tela asfáltica.
Slate Chippings for Flat Roofs
6,93 €
6,93 €
Delivery in 3–9 days
Tax included.
Shipping calculated at checkout.
How much stone do I need?
How much stone do I need for the ground?
For pebbles and gravel:
• ±80 kg per m², based on a 5 cm layer.*For grain sizes >32 mm a thicker layer is required.• Consumption per big bag: 1000 kg = 0.625 m³.
• Coverage: ±12.5 m² with a 5 cm layer.
For pine bark:
• ±70 L per m², based on a 5 cm layer.
• Consumption per big bag: 1000 L = ±1 m³ = ±600 kg
• Coverage: ±14 m² with a 5 cm layer.
For volcanic rock, slate and chamotte:
• ±50 kg per m², based on a 5 cm layer.
• Consumption per big bag: 1000 kg = ±1 m³
• Coverage: ±20 m² with a 5 cm layer
How much stone do I need to fill a gabion?
Density of ±1,650 kg per m³.
The calculation is easy to understand with an example: for a gabion measuring 100x50x30 cm, do the following:
1x0.5x0.3 = 0.15 m³
0.15x1,650 = 247.50 kg of stone.
*It is always a good idea to allow 5% extra, as gabions widen slightly when filled and always take a little more stone than the theoretical calculation.
Please note!
PLEASE NOTE! Before buying, read this information about gravel and pebbles
Grain sizes are sieve sizes, not exact measurements
When we talk about stone of, for example, 60-80 mm, we mean that the stones pass through an 80x80 mm square mesh and do not pass through a 60x60 mm one. A stone 100 mm long and 65 mm wide can easily pass through that 80x80 mesh, because the mesh sorts by the width of the stone as it passes through, not by its total length. That is why it is normal for a percentage of stones to have some dimension above 80 mm or below 60 mm.
Machines do not sort 100% accurately
In addition, no industrial sorting process is perfect: there is always a small percentage of stone which, due to speed, irregular shape or pieces overlapping on the belt, does not pass correctly through the corresponding mesh and slips into the grade, so stones larger than stated may occasionally appear. This is normal for this type of product and is not considered a defect.
Breakage of pebbles
In pebbles over 60 mm, up to 10% of the stones may break during sorting, washing, loading and unloading. We currently have no machinery that completely prevents this breakage. The product photos show only real pieces: broken pieces have not been removed.
Dust and sand in the product
This product is not washed, so it contains dust, sand and even traces of other materials from processing and transport. This is no problem for its use: the stone washes itself over time, or you can rinse it with water before use if you prefer.
Colour can vary considerably between batches
This is natural stone, and the colour changes from one batch to another, sometimes noticeably. This is especially important for multi-toned stones such as Blanco Rosa: some batches come out very white and others very pink, within the same product. If the exact shade is very important for your project, we recommend not buying this type of product online, as we cannot guarantee that the batch you receive will match the photo or a previous purchase.
Returns
Please bear in mind that returns, especially of 1,000 kg big bags, are usually complicated and expensive because of the weight and volume of the material. If the return is not due to an error on our part, the costs and arrangement of the return transport are borne by the customer.
Slate Chippings for Flat Roofs
Crushed Slate Gravel for Flat Roofs and Rooftops
Protect your roof and extend its service life with our Natural Slate Gravel. Supplied as thin slabs or flakes, this material is the ideal technical finish for flat or low-pitch roofs, especially those with asphalt finishes or bituminous membranes.
Its main function is to act as a protective shield against premature ageing caused by UV radiation, extreme temperature changes and harsh weather, preventing the asphalt membrane from cracking or deteriorating.
📐 Available Grain Sizes
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0-2 mm: Ideal for finer finishes, sealing or technical mixes.
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6-14 mm: The perfect size for robust protection and an aesthetic finish with more texture and greater drainage capacity.
✅ Benefits and Functions
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Total UV Protection: Filters sunlight, the main cause of degradation in waterproofing sheets.
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Thermal Regulation: Helps cushion sudden temperature changes in the roof structure.
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High Yield: Thanks to its laminar shape (thin flakes), it offers exceptional coverage with very little material, optimizing your investment.
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Anti-Slip Properties: Makes it easier to walk safely on the roof for maintenance.
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Natural Look: Provides a sober, elegant and professional finish compared with conventional river gravel.
🛠️ Applications
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Surface protection for asphalt membranes and waterproofing membranes.
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Decorative finish on walkable and non-walkable roofs.
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Use in technical gardening and landscaping thanks to its neutral colour and durability.
Frequently asked questions
What is this slate gravel used for?
It is a technical finish for flat or low-pitch roofs, especially those with asphalt finishes or bituminous membranes. It acts as a shield against UV radiation and extreme temperature changes, preventing the asphalt membrane from cracking or deteriorating.
What grain sizes are available and which should I choose?
There are 0-2 mm and 6-14 mm. The 0-2 mm size is ideal for finer finishes, sealing or technical mixes; the 6-14 mm size offers robust protection and a finish with more texture and greater drainage capacity.
How much do I need?
Thanks to its laminar shape, in thin flakes, it offers exceptional coverage with very little material. This helps optimize the investment in your roof.
Can the roof be walked on?
According to the description, it has anti-slip properties that make it easier to walk safely on the roof for maintenance. It works as a decorative finish on both walkable and non-walkable roofs.
Can it also be used in gardening?
Yes. Thanks to its neutral colour and durability, it can be used in technical gardening and landscaping, as well as for surface protection of asphalt membranes and waterproofing membranes.
Frequently asked questions about gravel, pebbles and decorative stone
¿Es seguro Gravilla de Pizarra para tejado tipo cubierta plana para acuarios o terrarios?
Sí, es un material natural apto para decoración de acuarios, terrarios y hábitats de reptiles. Recomendamos lavarlo bien con agua abundante antes de introducirlo para eliminar el polvo fino.
¿Puede alterar el pH del agua del acuario?
El impacto sobre el pH suele ser mínimo en la mayoría de los casos, pero si tienes peces o especies sensibles te recomendamos hacer una prueba previa en un recipiente con agua antes de introducirlo en el acuario definitivo.
¿Qué tamaño tiene el grano?
Consulta la granulometría indicada en la ficha del producto; seleccionamos un tamaño homogéneo adecuado para decoración de acuarios, terrarios y viveros.
¿Sirve también para otros usos decorativos?
Sí, además de en acuarios y terrarios, también se utiliza en jardinería, macetas y decoración de exteriores.
¿Hay que lavarlo antes de usarlo?
Sí, recomendamos lavarlo con agua abundante antes de su uso para eliminar el polvo fino que pueda desprender.
