Seeded Extensive Green Roofs

When to specify...

Seeding an extensive green roof can be an economical and practical method of greening very large areas. The Bauder Flora Seed Mixes are specifically designed for sowing at roof level they contain tackifier and fertiliser with the seed to stick the seed to the substrate so that it is not blown off or washed off the roof. This ensures the highest germination rates. To meet particular planting requirements on Biodiverse roofs seeding is often combined with plug planting to get an exact species mix.

Key features

■□ All 5 seed mixes are sourced using British native species seed stock.
■□ RHS (perfect for pollinators) compliant.
■□ Buglife approved.
■□ Low system weight typically circa 140kg/sq m.
■□ Height of system 150-200mm.
■□ 13.5 Ltr of water retention within drainage board.


■□ Lower cost than using pre-grown blanket or plugs.
■□ Improve SUDs capacity of the roof.
■□ Fully GRO and FLL compliant.
■□ Different mixes to suit a range of environments.
■□ Assists in maximising the building's potential to meet a BAP.
■□ Vegetation can be chosen to fulfil BREEAM requirements.


BauderGREEN Seeded Wildflower System


  Function Product name Thickness
1 Vegetation BauderGREEN Flora seed mixes Height and weight varies with season
2 Substrate BauderGREEN SUB-BM UK 100 120
3 Filtration layer BauderGREEN FV 125 100 1 0.1
4 Drainage layer BauderGREEN DSE 40 40 15.3
5 Protection layer BauderGREEN FSM 600 4 3.6
Green roof system build-up 145 139
6 Bauder waterproofing Options for Bituminous membrane, Hot Melt, Single ply or Cold applied liquid systems. Not included Not included
In-depth and up-to-date product specific technical data is available for each element within a system.
Download from our technical-centre

Approvals, certification and guarantee

■□ Comprehensive range of guarantee packages to fulfil cover requirements for the project (dependant on system/product
      selection). For more information contact our technical department for a sample guarantee outlining cover level, terms
​      and conditions.
■□ Substrate, filtration layers and drainage boards comply with FLL guidelines.
View certifications here ►


Environmental credentials

■□ Substrates include a high proportion of recycled crushed brick and aggregate.
■□ Protection, filtration and isolation layers manufactured from recycled materials.
■□ DSE40 is manufactured from recycled polyethylene.
Read more about sustainability at Bauder ►


Installation and maintenance

The quality and experience of the installing operative is paramount to ensuring a successful project. Bauder Approved Contractors are the only people fully trained and certified to install our products. They provide the necessary experience that our guarantees demand.
Go to approved contractor information ►
Go to maintenance advice ►