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Bauder Sedum Plug Plants Extensive Green Roof System, Pitched Roof

Verified by manufacturer 25 days ago

Bauder Ltd

Bauder Sedum Plug Plants extensive green roof system, for pitched roofs.

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+44 (0)1473 257671 www.bauder.co.uk

Application

Suitable for both new build construction and retrofit refurbishment projects.

Description

Bauder Sedum Plug Plants extensive green roof system, for pitched roofs. Lightweight extensive green roof incorporating multidirectional drainage and a minimum of 80 mm FFL compliant substrate/ growing medium. The system is suitable for both new build construction and retrofit refurbishment projects.

Bauder offers a range of vegetation in plug plant format for use in green roof installations. The plants have individual structure and form and the variety of colours provide a diverse aesthetic appearance of the roof.


Features and benefits:

  • Plant selection is bespoke to the project and can incorporate native species vegetation to gain BREEAM credits.
  • Broad palette of plants for varied aesthetic appearance.
  • Storm water management capacity.
  • Substrate is extremely lightweight.
  • Drainage layer and substrate keep system weight to minimum.
  • Provides a foraging site for bees during flowering.
  • Cost-effective on large roofs.
  • System helps mitigate flooding.
  • Substrate meets FLL European Standards.
  • Low weight system allows for design flexibility.

General information

Uniclass

Ss_45_40_47_28 Extensive green roof systemsPrimary

CAWS

Q37/130 Extensive green roof

Specification data - Extensive green roof systems

Protection

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Protection layer

BauderGREEN FSM 600 protection mat.

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 Bauder 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.

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 Bauder 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.

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 Bauder 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. 5m².
  • Weight (saturated/ dry): 4.3 kg/m².
  • Material: 100% recycled shredded rubber.

Root barrier

Supplied by others.

20/ 40 mm rounded river washed pebbles.

For slopes below 10° only.

A vegetation barrier must be provided to all perimeters, abutments penetrations including protrusions i.e. man-safe posts etc.

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.

Paving slabs.

For roof slopes 10° upwards, a hard edge should be supplied using paving slabs as an alternative to 20/ 40 mm round river washed pebbles.

Moisture control

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Drainage layer

Water storage and multi-directional drainage layer. 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 (when unfilled): 10 L/ 22.1 L.
  • Compressive strength: 25 kN/m²/ 35 kN/m².
  • Weight (substrate filled and saturated): 10.65 kg/m²/ 22.1 kg/m².
  • Material: Expanded polystyrene.

BauderGREEN WSP 75 / 50 reservoir board.

Water storage, multi-directional drainage layer available in two depths 50 mm or 75 mm. Roofs pitched between 0–25°.

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: Approximately 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. Manufacturer Green Roof Technical Team provides a service whereby the type of plants best suited to the building location, height of the roof, slope and orientation are selected. This helps to ensure that the optimum mix is selected and reduces loss of individual species because of incorrect specification. 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 fertilized 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.

Filter membrane

BauderGREEN FV 125 filter fleece.

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. Fleece joints should be overlapped 150 mm. Fleece should not be taken over the top of drainage outlets.

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.

Upstands (soft landscaping): Extend up, between vegetation barrier and growing medium and trim flush with finished surface level.

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

  • 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.

Planting systems

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Planting medium

BauderGREEN SUB-EM UK extensive substrate.

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.

For roofs pitched 6° upwards, apply the substrate growing medium directly into the open cup of the reservoir board and then build up to the depth specified. Substrates are raked out to give an even coverage of the required depth after settlement.

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

For roofs pitched 6° upwards, apply the substrate growing medium directly into the open cup of the reservoir board and then build up to the depth specified. 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.

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 16º–25º. This trellis will provide initial retention until plant establishment and help prevent soil erosion. It will eventually rot away naturally.

Important note regarding alternative substrates:

Alternative substrates are not recommended for Bauder supplied planting.

Planting requirements

Bauder Sedum Blankets are grown in a shallow growing medium which contains very little nutrient, so the annual application of fertilizer is crucial to ensure that the plants remain healthy. Fertilizer should ideally be applied during March/ April, as it helps the plants to prepare for extreme weather conditions and flowering whilst also allowing the different species to gain sufficient nutrients without competing against each other.

Organic fertilizer can be obtained direct from Bauder in 25 kg bags, which is sufficient for an area of 312.5 m² when applied at the recommended rate of 80 g/m². Areas of up to 30 m² may be applied using either a handheld spreader or strewn by hand from a bucket. Larger roofs should always be done using a trolley applicator, which can be purchased direct from Bauder. Always apply the fertilizer at the given rate written on the bag.

It is recommended that the fertilizer is lightly ‘watered in’ immediately after application, to avoid “burning” of the foliage, which may occur if fertilizer pellets settle on the leaves. Dung-based organic fertilizers should be avoided.

BauderGREEN Plugs native wildflower/sedum.

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.

For roofs pitched 6° upwards, apply the substrate growing medium directly into the open cup of the reservoir board and then build up to the depth specified. Substrates are raked out to give an even coverage of the required depth after settlement.

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

For roofs pitched 6° upwards, apply the substrate growing medium directly into the open cup of the reservoir board and then build up to the depth specified. 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.

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, silo lorry (pumping directly onto the roof area), 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 16º–25º. This trellis will provide initial retention until plant establishment and help prevent soil erosion. It will eventually rot away naturally.

Important note regarding alternative substrates:

Alternative substrates are not recommended for Bauder supplied planting.

Waterproofing

To be fully specified separately.

Bauder Total Green Roof System Roof Covering System.

Bauderflex Green Roof System.

Bauder Single Ply Thermofol PVC Roof system.

Bauder Single Ply Thermoplan T Flexible Polyolefin Roof system.

Bauder LiquiTEC Cold Liquid Applied Roof System.

Maximum Slope

25°.

Accessories

Not required.

BauderGREEN KFL AL 100/80 edge trim.

Perforated edge/ drainage trim used to frame and contain the green roof build-up. AL80/ 100 is specifically for use within substrate based green roofs. AL80/ 100 must always be used in conjunction with the pebble vegetation barrier (below 10° only)/ or hard edge (such as a paver).

Normally installed directly onto waterproofing, the drainage trims can be welded down using lengths of the waterproofing membrane. The trim is used to frame the green roof build up and should be completed and inspected prior to living material being delivered to site. See Bauder Green Roof Installation Guide for full details.

  • Material: Aluminium.
  • Thickness: 1.5 mm.
  • Trim height/ width: 80 mm or 100 mm (optional).
  • Trim length: 2000 mm.
  • Supply form: 10 units per box, Joint Sections and Corner Sections are also available.

Precautionary note:

When cutting metal, ensure that appropriate tools and personal protection equipment are used.

BauderGREEN AL 150 edge trim.

Perforated edge/ drainage trim used to frame and contain the green roof build-up. AL150 is specifically for use within substrate based green roofs. AL150 must always be used in conjunction with the pebble vegetation barrier (below 10° only)/ or hard edge (such as a paver).

Normally installed directly onto waterproofing, the drainage trims can be welded down using lengths of the waterproofing membrane. The trim is used to frame the green roof build up and should be completed and inspected prior to living material being delivered to site. See Bauder Green Roof Installation Guide for full details.

  • Material: Aluminium.
  • Thickness: 1.5 mm.
  • Trim height/ width: 150 mm.
  • Trim length: 2000 mm.
  • Supply form: 2 m lengths, Joint Sections and Corner Sections are also available.

Precautionary note:

When cutting metal, please ensure that appropriate tools and personal protection equipment are used.

Retention Angle (supplied by others).

Used behind a waterproofed castellated retention batten and perimeters/ top of the slope (when Bauder Trims are not sufficient in height).

Purpose designed aluminium or stainless-steel perimeter retention angles, used to contain landscaping or pebble ballast when interfacing soft or hard landscaping. These retention angles are to be supplied and fabricated by others to the landscape architect’s requirements and incorporating drainage perforations where required.

Cutting: Neat, accurate and without spalling.

Junctions: Cut with a hacksaw to form 90º corners – mitre cut fixing arm.

Position: True to line and level. Smooth continuous lines.

Fabrication: Obtained from a specialist metal fabricating company. The metal should be regularly perforated on the vertical face to allow drainage, with drainage holes being 3–5 mm maximum diameter. The top leading edge should be folded fully or at a right angle by a minimum of 20 mm to eliminate the sharp edge.

Horizontal leg: For the base of the slope, in conjunction with the castellated retention battens – To be 200 mm wide. Only the vertical section needs to be perforated.

For open perimeters/ top of the slope – To be 200 mm wide with 60 mm diameter holes positioned and cut centrally along the fixing arm at a rate of 6/ linear metre.

Height: To be as landscaping build-up.

Installation: At the base of the slope, in conjunction with the castellated retention battens – The retention trims must be securely placed in front of the drainage gaps in the castellated retention kerb

The angle should be installed loose over the specified protection layer.

At open perimeters/ top of the slope – The retention trims must be secured in place using the specified Bauder capping sheet/ Waterproofing strips/ flashing pieces (1000 x 200 mm size), bonded to the surface of the horizontal leg and set at intervals of 400 mm between flashing pieces. The main capping sheet/ membrane/ waterproofing must be overlapped by a minimum of 100 mm.

Hard edge (minimum 300 mm width): The retention trims should be used in conjunction with the pebble vegetation barrier/ hard edge.

Precautionary note: when cutting metal, please ensure that appropriate tools and personal protection equipment are used.

BauderGREEN KS ALU 250 inspection chamber.

The Bauder ALU250 Inspection Chamber is fabricated from a perforated aluminium sheet with an opening/ lockable lid and is used for intensive and extensive soft landscaping, as well as ballasted inverted roofs. Install centrally over rainwater outlets. A simple on-site modification allows the unit to be used over outlets that are located close to wall or kerb abutments.

The Inspection Chamber is suitable for landscaping depths of less than 100 mm. Where landscaping is deeper than 100 mm, the 50 mm or 100 mm height adaptors can be added as necessary to achieve the required height to be level with or slightly proud of the surrounding landscaping.

Surround:

Using 20/ 40 mm grade washed pebbles; the inspection chamber must be surrounded by a 500 mm vegetation barrier to prevent unwanted growth obstructing the drainage system.


BauderGREEN KS ALU 250 inspection chamber:

  • Material: 1.5 mm aluminium (2 mm lid).
  • Length: 250 mm (chamber only).
  • Width: 250 mm (chamber only).
  • Height: 100 mm.
  • Weight: 950 g.
  • Colour: Silver grey (RAL 9006).

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