Is my roof strong enough for a green roof?

  • This is where it's best to consult an architect, structural engineer or a building surveyor. If you go to one of these professionals you will need to provide them with the size of the span, the timbers used  (size & structural strength of them). They will normally be able to help for free or a small fee depending on the company or person.
  • If you are in the design stage or on a new build you will likely already have one or more of these as a contact and they will be able to make sure the roof will take the weight. Most modern buildings will accept a green roof.
  • All of our products have saturated weights listed on their page and this is the weight that you need to ensure your roof will take.
  • If you want to put a living roof on to your garden shed or any other small outbuilding that has been bought its best to contact the manufacturer to see what weight it will take.
  • Contact us if you have any questions or need any advise on what you need to ask.
  • For information on roof spans, joist sizes & weights that they can take please either use the TRADA span tables under section 7 for flat roofs or BS EN 1995 or contact a professional as mentioned above.