What is green roof substrate?

Green roof substrates are typically a combination of organic and inorganic materials. Organic materials are usually kept to a maximum of 20%. This is for a few very good reasons. Organic materials (think coir, pine bark and compost) have a tendency to degrade over time and slump.

What is intensive and extensive green roof?

Soil Depth Typically, an extensive green roof has less than 200 mm of soil or substrate, whereas an intensive green roof can have areas of substrate that are a metre or more in depth.

How do you make a green roof intensive?

With the decking in place, here are the steps to installing a green roof:

  1. Install Waterproof Membrane. Install a monolithic type waterproof membrane (rubber or plastic) on top of the roof decking.
  2. Put Down Plastic Sheet.
  3. Add Foam Installation.
  4. Set Drainage Mat.
  5. Frame the Sides.
  6. Add Soil.
  7. Place Plants.
  8. Water.

What is a roof substrate?

Roofing substrate is the surface a roofing system is applied on. This can include the roof deck, insulation system or even a pre-existing roof system. It serves to support the other elements of your roof. The type of substrate used in your project will vary greatly depending on the type of construction.

What is Sedum substrate?

Sky Garden’s sedum substrate is a specially blended mix of free-draining organic material with clean, screened granular aggregates, recycled from certifiable waste products from the building industry, to provide a low nutrient water-retentive growing medium.

What is an intensive roof?

Intensive green roofs consist of much deeper substrates which give far greater scope to design and grow more complicated and elaborate gardens onto concrete structures. Wallbarn supplies intensive green roof systems with soil substrates over 1 metre deep.

What is Semi-Intensive roof?

A semi-intensive green roof system is characterized by small herbaceous plants, ground. covers, grasses and small shrubs, requiring moderate maintenance and occasional irrigation. A typical growing medium depth for a semi-intensive green roof is 15 to 30 cm.

How thick is an intensive green roof?

Design variants include extensive and intensive green roofs. G-1 Extensive green roofs have a much shallower growing media layer that typically ranges from 3 to 6 inches thick. G-2 Intensive green roofs have a growing media layer that ranges from 6 to 48 inches thick.

What are the different types of green roofs?

Three types of green roofs exist: extensive, semi-intensive, and intensive green roofs. An extensive green roof is characterised by its low weight, a thin layer of growing medium (green substrate), a mix of plants adapted to conditions on the roof, minimum maintenance and low installation costs.

What is substrate board?

Substrate boards on wood decks (plywood, OSB, planking) are used to increase fire resistance, prevent adhesive from dripping into the interior, provide a clean and acceptable surface onto which an air or vapor retarder can be adhered, or as a surface onto which the insulation can be adhered.