MY BASKET
SEARCH

Your mini basket

There are no products in your basket.

Sky Garden Boulders

Highland cobbles have increased roundness and a smooth texture created by glacial-alluvial movement. Bags contain a mixture of sizes

Read More

£297.25 Per pack

(Excl. VAT £59.45)

Calculate cost
Pack
1kg
Of CO2 Offset by
your roof per year
Would you like an installation quote?


Total: £297.25
SKU: BOU01 Categories: ,
Popular FAQs
More FAQs
  • How did Green Roofs begin?
    Green roofs are said to have originated as far back as the Babylon Gardens, where specialist irrigation systems were used to keep the vegetation lush. Other notable historical uses of green roofs are in Scandinavia, where traditional sod or turf roofs were used for insulation and camouflage. The modern day green roof originated in Germany in the 1970s. Serious storm water runoff needed a solution and the modern green roof was born. Now with advances in technology green roofs offer more benefits than ever before and prove to be a great alternative to standard roofing.
  • How expensive is it?
    The cost of a green roof depends on many factors such as the type of system, size and location. See Insights  “How much does a green roof cost per m2?” for a more in depth answer to this question.
  • Can I still have solar panels?
    Yes. Green roofs can be designed to fit around solar panels or the panels can fit on top of the roof. This can not only increase the efficiency of the solar panels, but the shade created by the solar panels can increase biodiversity of the underlying green roof. Special care must be taken when selecting plants to be installed in the shaded areas to ensure they grow well in low light conditions.
  • What is BREEAM and how can I improve my rating?
    BREEAM stands for Building Research Establishment Environmental Assessment Method and essentially sets the standard for the best practice in design for large scale developments. It is used to assess the environmental performance of buildings and communities. The addition of a green roof can increase the building’s BREEAM rating by making the building more environmentally friendly. You can learn more about BREEAM and green roofs on our Downloads page.
  • What is drainage board?
    Drainage board is a specifically designed layer that absorbs enough water for the plants to grow naturally but allows excess water to run off. This means the substrate does not get waterlogged but the board holds water to be accessed when precipitation levels are lower. It also contributes to reducing runoff as it holds and stores water when rainfall is high for the plants to use when needed.

  • A key aspect of every bio-diverse system is the provision of habitat areas. Boulder piles provide larger off ground habitat potential for insects, bats and birds. Boulders also warm up quickly benefiting beetles and butterflies. Sky Garden provide sustainably sourced boulders to compliment their green and biodiverse roofs.

    – Each bulk bag contains materials to create 2-3 habitats or can be used individually.
    – Typical density is 1 pile per 50m².
    – Bulk bag contains a mixture of boulders with varying diameter, shape and colours.

     

    Features and benefits

    54%

    Better rain water retention

    2-12 dB

    Sound reduction

    239g

    Carbon Reduction /metre sq

    8-12%

    Increase in insects /metre sq

    2-12%

    Reduction in ambient temperature

    5%

    Average increase value to the build

  • Physical Properties Dimensions 200-400mm diameter
    Physical Properties Quantity 12-24 per bulk bag
    Physical Properties Consignment size Bulk Bag
    Physical Properties Approx. Weight 750-1000kg

  • All your materials arrive in one delivery from our UK farm and are simple to unload and install straight away.

  • Popular FAQs

    • Does a green roof need maintaining?
      Yes. Green Roofs are 'Low-Maintenance' not 'No-Maintenance'. Green roof maintenance is generally a very simple process. They are designed so that they will not require endless hours spent on the roof in order to keep them looking at their best. Each type of green roof brings many different benefits to the occupants, the owners and the roof itself, so a little time maintaining the system is advantageous in the long run.
    • How often does a green roof need maintaining?
    • What access requirements are needed to install my green roof?
      The components of a green roof system can be delivered in m3 sacks, which is the best option for larger builds with crane access. However, on smaller installations with less access 25kg bags can be used and distributed by hand if the transporter cannot get close to the roof.
    • Why use Sky Garden?
      Sky Garden is the UK’s leading independent green roof installer and contractor. We source and grow all our products sustainably in the UK and have sales teams around the country that are happy to help with your green roof specifications and needs. Our experts in the field have developed drainage systems that can be used on any angle of slope and can even install living walls. Our award winning team can supply and install bespoke designs and have the experience of many large commercial and domestic projects. See our gallery for more information on past projects.
    • Will Sky Garden provide habitats for wildlife?
      Sky Garden strives to create the most diverse roofs with the best provisions for wildlife. Our seed mixes are designed to replicate optimum conditions for a whole host of wildlife. With certain systems habitat creation comes as standard; with log piles, rock mounds and areas of bare sand to replicate natural environments. Bat, bird and bee habitats are also available to increase the attractiveness of your green roof to the local wildlife population.
  • 1-5

    Company Brochure

    A comprehensive guide to Sky Garden's green roof systems. Download for detailed information regarding each system available, as well as valuable guidance for maintaining your perfect green roof.

    2-5

    Biodiversity Brochure

    Download Sky Garden's biodiversity brochure to build your knowledge on the benefits and systems involved in our biodiverse green roof systems.

    Boulders

    Sky Garden - Boulders Datasheet

    Sky Garden - Boulders Datasheet

    Download Company Brochure

    • We’d love to send you exclusive offers and the latest info from SkyGarden name by email. We’ll always treat your details with the utmost care and won’t share them with any third party. You can, of course, opt out of these communications at any time! See our Privacy Policy for more info.
    • Hidden
    • Hidden
You may also be interested in...

subscribe to

Going Green

Email Newsletter