Bauder Sedum Plug Plants Extensive Green Roof System, Flat Roof

BauderGREEN FSM 600 protection mat.

Guidance for specification option:

Heavy-duty protection layer made from polyester and polypropylene fibres. Laid on the completed waterproofing to protect the completed waterproofing from damage (not required for inverted roofs). Normally installed under the entire green roof area but kept clear of all outlets and drainage trims.

FSM mats should be lapped by 150 mm at all joints. Loose laid. Laps to be sealed by lightly heating overlap area with a propane gas torch/ hot air welding gun to melt the polypropylene fibres and then press seal the two fleece sheets together.

Sufficient protection fleece must be allowed for so that it may be installed to all abutment upstands and edge details, in accordance with the manufacturer instructions. Extend to full height of the upstand and secure in place by using a lead or fabricated metal counter-flashing.

Should be trimmed well back from ALL outlets.

Openings in landscape restraint kerbs (where present –roof slopes above 5º), the protection layer should be cut away from the openings/ gaps to avoid impeding drainage.

• Width: 2 m.
• Length: 30 m.
• Thickness: 4 mm.
• Coverage: 60 m².
• Weight (saturated): 3.6 kg/m².
• Material: Polyester and polypropylene fibre mix.

BauderGREEN SV 600 protection and moisture mat.

Guidance for specification option:

Lightweight protection layer made from recycled man-made fibres. Laid on the completed waterproofing to protect the completed waterproofing from damage (not required for inverted roofs). Normally installed under the entire green roof area but kept clear of all outlets and drainage trims. Eco-mat should be lapped by 150 mm at all joints. Loose laid.

Sufficient protection fleece must be allowed for so that it may be installed to all abutment upstands and edge details, in accordance with the manufacturer instructions. Extend to full height of the upstand and secure in place by using a lead or fabricated metal counter-flashing.

Should be trimmed well back from ALL outlets.

Openings in landscape restraint kerbs (where present –roof slopes above 5º), the protection layer should be cut away from the openings/ gaps to avoid impeding drainage.

• Width: 2 m.
• Length: 30 m.
• Thickness: 6 mm.
• Coverage: 60 m².
• Weight (saturated): 3.8 kg/m².
• Material: 100% recycled man-made fibre mix.

BauderGREEN GGM 6 rubber protection mat.

Guidance for specification option:

Bauder's heaviest duty protection layer made from recycled shredded tyres. Laid on the completed waterproofing to protect the completed waterproofing from damage (not required for inverted roofs, not for use with PVC waterproof membranes/ Bauder Single Ply Thermofol PVC Roof system).

Normally installed under the entire green roof area but kept clear of all outlets and drainage trims.

Normally installed to provide access over waterproofing in heavily trafficked areas.

Pro-mat should be lapped by 150 mm at all joints. Loose laid. Where landscaping installation is not imminent, loose laps should be taped with gaffer tape to eliminate the trip hazard.

Sufficient protection fleece must be allowed for so that it may be installed to all abutment upstands and edge details, in accordance with the manufacturer's instructions. Extend to full height of the upstand and secure in place by using a lead or fabricated metal counter-flashing.

Should be trimmed well back from ALL outlets.

Openings in landscape restraint kerbs (where present –roof slopes above 5º), the protection layer should be cut away from the openings/ gaps to avoid impeding drainage.

• Width: 1.25 m.
• Length: 10 m.
• Thickness: 6 mm.
• Coverage: 12.5 m².
• Weight (saturated/ dry): 4.3 kg/m².
• Material: 100% recycled shredded rubber.

Supplied by others.

Guidance for specification option:

For slopes below 10° only. (Roof slopes 10° upwards a hard edge should be supplied using paving slabs as an alternative to 20/40mm round river washed pebbles).

A vegetation barrier must be provided to all perimeters, abutments penetrations including protrusions i.e. man-safe posts etc. We recommend 20/ 40 mm rounded river washed pebbles. Stones/ aggregates with sharp edges must not be used i.e. flint. 

In accordance with current GRO guidelines, the specified barrier widths are as follows:

• Minimum 300 mm but increasing to 500 mm at vertical walls with opening windows or doors or to abutments with opening rooflights.
• Every 40 m, there is a 30 mm high barrier constructed of non-flammable materials or a one metre wide strip of solid paving, gravel or pebbles.
• At all open drainage perimeters, drainage trim must be used to contain the vegetation barrier.
• Vegetation barrier removal or reduction of the recommended width: Pebble vegetation barriers function as a fire break between potentially flammable dry vegetation and abutting construction materials that are also potentially flammable, to prevent fire spreading. These can be seen as an aesthetic issue for smaller green/ blue roof areas and for this reason some clients/ designers choose to reduce this width or otherwise remove the barrier altogether. 

The current barrier guidelines are set by the GRO codes of practice that Bauder follows and promotes. These are guidelines and not currently a legal requirement under British Standards or Building Regulations. However, not following these guidelines may affect an insurance claim in the unlikely event of a fire. Consequently, Bauder Ltd cannot accept liability for issues arising from non-compliance with the current GRO guidelines.

BauderGREEN DSE 20 drainage board.

Guidance for specification option:

HDPE 20 mm depth water storage and multi-directional drainage layer. Roofs pitched between 1-5°.Used on roofs 1–5° finished falls. Loose laid (open profile cup up) on to the Protection Layer (or WFRL on inverted roofs) over completed waterproofing to provide continuous drainage within hard and soft landscaping. It is primarily used where the load is moderate, such as extensive green roofs, beneath paving laid on sand/ cement or gravel bedding or within planter beds.

Boards are to be interlocked by a minimum of one profile cup and all board joints staggered. Cut to fit closely around penetrations and outlets.

• Size: 1.06 x 2.36 m (2.5 m²).
• Nominal wall thickness: 2 mm.
• Depth: 20 mm.
• Coverage: 2 m² (approximately).
• Water storage: 7.4 L.
• Weight (saturated): 8.6 kg/m².
• Material: 100% recycled high-density polyethylene.

The drainage/ water storage board also provides a suitable base surface for building concrete or brick kerbs/ walls. The specified infill haunching should be installed over the board to the required depth of cover, poured directly into the profile cup of the board. These should be constructed to provide an adequate support for the raised masonry planters.

BauderGREEN DSE 40 drainage board.

Guidance for specification option:

HDPE 40 mm depth water storage and multi-directional drainage layer. Roofs pitched between 0-5°. Used on roofs 0–5° finished falls. Loose laid (open profile cup up) on to the Protection Layer (or WFRL on inverted roofs) over completed waterproofing to provide continuous drainage within hard and soft landscaping. It is primarily used where the load is moderate to high, such as extensive and intensive green roofs. Its compressive strength makes it suitable beneath paving laid on sand/ cement or gravel bedding or within planter beds.

Boards are to be interlocked by a minimum of one profile cup and all board joints staggered. The ‘X’ stamped impression on the highpoint of the cup moulding indicates where boards overlap. Cut to fit closely around penetrations and outlets.

• Size: 1.04 x 2.03 m (2.1 m²).
• Nominal wall thickness: 2 mm.
• Depth: 40 mm.
• Coverage: 2 m² (approximately).
• Water storage: 13.5 L.
• Filling capacity: 21 L.
• Compressive strength: 80 kN/m² empty/ >1000 kN/m² aggregate filled.
• Weight (saturated): 15.3 kg/m².
• Material: 100% recycled high-density polyethylene.

The drainage/ water storage board also provides a suitable base surface for building concrete or brick kerbs/ walls. The specified infill haunching should be installed over the board to the required depth of cover, poured directly into the profile cup of the board. These should be constructed to provide an adequate support for the raised masonry planters.

BauderGREEN WSP 75 / 50 reservoir board.

Guidance for specification option:

Water storage, multi-directional drainage layer available in two depths 50mm or 75mm. Roofs pitched between 0-25°. Used on roofs 0–25° finished falls (the only suitable Drainage and Protection layers for slopes 6° upwards). Boards laid over the entire area to provide continuous drainage and increased water capacity for the vegetation.

Loose laid (open cups up) on to the Protection Layer (or WFRL on inverted roofs) over completed waterproofing ensuring that the rebated boards are properly interlocked to provide adequate anchorage prior to the soil being laid. The board cups can be filled with water to provide temporary loading against wind uplift prior to installing the remaining landscaping elements in accordance with the specification. In the event of any confusion concerning this item, Bauder Ltd should be contacted so that advice may be given.

Cut to fit closely around penetrations and outlets.

Roof slopes 6° upwards, a parapet wall or restraint kerb must be provided to support the water storage/ drainage board at the base of the slope. This should be included within the deck construction and reference made within the waterproofing specification also. This in turn will restrain and stabilize the landscaping against imposed shear load forces.

• Size: 0.795 x 1.298 m (rebates).
• Depth: 50 mm/ 75 mm.
• Coverage: 1 m².
• Water storage: 10 L/ 22.1 L.
• Compressive strength: 25 kN/m²/ 35 kN/m².
• Weight (saturated): 10.65 kg/m²/ 22.1 kg/m².
• Material: Expanded polystyrene.

BauderGREEN FV 125 filter fleece.

Guidance for specification option:

Fine mesh PP geotextile used in conjunction with Bauder substrates. Bauder Filter Fleece is designed to separate and contain Bauder substrates from the drainage element of the green roof system (for slopes 0–5°). It prevents fine material from being washed out of the substrate layer.

Loose laid over the drainage layer. The fleece should be taken up the sides of the substrate between the substrate and drainage trim or pebble margin. Fleece joints should be overlapped 150 mm. Fleece should not be taken over the top of drainage outlets.

Upstands (Hard landscaping): Extend to top of perimeter abutments and trim flush just below finished surface level.

A filter layer is not used over reservoir board on slopes 6° or above, where the reservoir board is directly filled with substrate growing medium. However, a separate strip of Bauder Filter Fleece must still be used to separate the growing medium from the vegetation barrier at perimeter abutments and around pipe protrusions, outlet inspection chambers etc. dressed up all upstands and around all protrusions to at least flush with the finished surface level. At abutments the Filter Fleece must be used to separate the vegetation/drainage barrier and substrate growing medium by extending it 500 mm beneath the reservoir board and then bringing it up between these two items.

• Weight (saturated): 0.125 kg/m².
• Pore size: 0.13 mm.
• Thickness: 1 mm.
• Roll size: 1 x 100 m/ 2 x 100 m.
• Coverage: 100 m²/ 200 m².
• Water storage: None.
• Material: Polypropylene fleece.

BauderGREEN SUB-EM UK extensive substrate.

Guidance for specification option:

Recycled crushed brick, expanded clay, shale, composted pine bark. Minimum 80 mm depth. Lightweight, free draining substrates designed as a growing medium for a range of different plant species. This FLL/ GRO compliant substrate provides a free draining, growing medium for extensive green roof systems. Additionally, it provides aeration qualities with some inherent water retention.

• Material: Recycled crushed brick, expanded clay, shale, composted pine bark.
• Maximum weight (saturated): <1200 kg/m³.
• Typical supply weight: 900 kg/m³ (approximate).
• Water storage (by volume): 35%.
• pH value: 6–8.5.
• Bulk bag size: 1.25 m³.
• Small bag size: 25 L.

Normally installed above a Filter Fleece and drainage board product. Substrates are raked out to give an even coverage of the required depth after settlement.

Handle in the driest condition possible. Do not handle or install when wet or frozen.

Start by applying two equal layers, building up to the required maximum depth.

Gently firm each layer before spreading the next. Allowance should be made for any settlement that may occur. It is recommended that ‘measuring stick’ markers of the required depth be used around the roof area to ensure that a minimum acceptable thickness of growing medium is achieved.

Depending on size and access of the project the ‘substrate’ can be supplied by various methods i.e. tipper, big bags, or sacks. Prior to costing this element of the installation, the ‘Bauder Approved Contractor’ must contact Bauder Ltd so that they may advise on the best solution on any specific contract.

Trellis Substrate restraint (including for all slopes above 16º): Provision must be made by the installing contractor for supplying and fabricating 25 x 50 mm untreated timber formed into a trellis frame that is supported at the base of the slope (resting against the protection layer). The trellis is to form a series of retaining grids 400 mm square and used on all slopes between 16–25º. This trellis will provide initial retention

Important note regarding alternative substrates:

Alternative substrates are not recommended for Bauder supplied planting.

BauderGREEN Plugs native wildflower/sedum.

Guidance for specification option:

These succulent plants are drought, wind and frost tolerant, will steadily grow and spread to provide an even vegetative cover over time.  

Supply and plant a mixture of Bauder supplied sedum and herbs plug plants in accordance with the landscape designers or ecologists planting schedule and drawings (where provided). All operatives carrying out the vegetation installation should refer to the Bauder installation and establishment guidelines for vegetation plugs, which is available from Bauder Ltd.

• Supply form: Maximum of 60 trays per pallet.
• Size: 4 cm plugs - 104 per tray / 5-6 cm plugs - 54 per tray.
• Coverage: Refer to specification.
• Saturated weight: Approx. 5 kg per tray.

Planted into the growing medium at a rate of 20 plants/m². The plant coverage rate should be increased to 25 plants/m² in areas subject to wind erosion i.e. corner zones, ridges, perimeters etc.

Plant trays should be lifted to roof level and unpacked immediately, or alternatively may be kept for a maximum of two days in cool covered storage prior to lifting to roof level. Spring and autumn are the most suitable times of year to plant the plugs. It is essential that both the growing medium and the plugs are thoroughly watered both prior to and immediately after installation. Plug plants will need to be kept moist for 10 weeks after installation.

Establishment Watering Requirements

Surface watering for the first 10 weeks following installation (to ensure the substrate remains moist to the touch). It is the responsibility of the roofing contractor to liaise with the main contractor/ building owner to provide water and ensure that the planted and fertilised growing medium is thoroughly irrigated immediately after installation.  

An adequate mains water supply of sufficient pressure must be available and operational prior to the plants being delivered and installed. Initial watering must be by surface mounted sprinklers. 

See the Bauder Watering Guide document for detailed information on watering requirements.  

Bauder Ltd accepts no responsibility whatsoever for the condition of installed planting that is not properly watered or irrigated following landscaping works.