BauderEXTENSIVE LIGHTWEIGHTsedum XF 301 sedum blanket system

Guidance for specification option:

Perforated edge/ drainage trim used to frame and contain the green roof build-up. AL40 is specifically designed to be used with the Bauder XF301 Sedum System.

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: 40 mm.
• Size: 73 x 2000 mm (W x L).
• Supply form: Joint Sections and Corner Sections are also available.

Guidance for specification option:

The BauderGREEN KS ALU 250 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 from 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).

Guidance for specification option:

• Material: 1.5 mm aluminium.
• Length: 250 mm.
• Width: 250 mm.
• Height: 50 mm.
• Weight: 250 g.
• Colour: silver grey (RAL 9006).

Guidance for specification option:

• Material: 1.5 mm aluminium.
• Length: 250 mm.
• Width: 250 mm.
• Height: 100 mm.
• Weight: 450 g.
• Colour: silver grey (RAL 9006).

Guidance for specification option:

The BauderGREEN RS 22 retention strip are designed to secure the Bauder XF301 sedum system on pitched roofs.

The Retention Strips are fitted on Single Ply and Cold Liquid Applied pitched roofs 5° and above and Bituminous pitched roofs 11° and above, to hold the XF301 system in place. Roofing Membrane is used to securely weld the strips in place. The sharp retention spikes grip the blanket and prevent slippage.

Normally installed directly onto waterproofing. The Retention Strips should be fitted with the spiked edge down the slope of the roof. Each roll of XF301 requires at least one retention strip to hold it in place. See the Bauder Green Roof Installation Guide for full details.

Warning: The Retention Strip spikes are extremely sharp; the protective plastic cover should not be removed until the XF301 Sedum System is being fitted.

• Material: 1.2 mm stainless steel.
• Trim height: 22 mm.
• Dimensions: 100 x 800 mm (W x L).
• Supply form: Boxes of 24 lengths

Guidance for specification option:

Lightweight protection layer made from 100% recycled man-made fibres. Used in conjunction with Bauder XF301 at the ridge of mono or dual pitched roofs 11° and above to provide additional water retention for these exposed areas.

Bauder Eco-Mat should be lapped by 150 mm on all joints.

See Bauder's Green Roof Installation Guide for full details.

• Weight (saturated): 3.8 kg/m².
• Water storage: 3.2 L/m².
• Thickness: 6 mm.
• Size: 2 x 30 m.
• Coverage: 60 m².

Guidance for specification option:

Where a vegetation barrier is used with a Bauder XF301 Sedum System (below 10° only).

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.
• For extensive green/ blue roofs where Bauder XF301 Sedum Blanket is specified, the vegetation barrier must cover the edges of the blanket by a minimum of 100 mm in order to protect the exposed edge of the blanket against wind uplift and substrate erosion. Please refer to Bauder standard green roof detailing for other extensive green roof systems.
• 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.

Guidance for specification option:

It is always advisable to ensure that there is a water supply point adjacent to the green roof, both to assist with general maintenance and as a precaution against extreme drought conditions.

The sedum plants used in the Bauder XF301 blanket system absorb and store water in their leaves, which they then use to survive during periods of drought. The purpose of the moisture retention fleece, which is incorporated into the system beneath the blanket, is to hold water after rainfall to give the plants sufficient time to take on as much water as possible. The moisture retention fleece is not a water storage medium, so do not be concerned should it dry out during periods of dry weather. If drought conditions arise it is important to check the plant leaves to see if they are still fleshy and not completely dried out.

When the Bauder XF301 blanket system is installed we recommend the provision of either a leaky pipe or drip line irrigation system specifically where the following conditions apply:

• All south-facing roof slopes exceeding a 5° pitch.
• All roof slopes exceeding a 10° pitch.
• Exceptionally windy and exposed site locations, where the wind can dry out the blanket.
• Sites up to 50 miles inland of the east coast of the UK mainland.

Irrigation should only be activated during prolonged periods of hot, dry weather, or if the sedum plants are showing signs of distress. The irrigation system is best activated for 2–3 hours, preferably at dawn or dusk to minimize unnecessary evaporation. Then once every 4–6 days for the duration of the hot weather conditions. This can be easily managed by using an inexpensive battery-powered, programmable timer.

Please note – continuous daily watering is neither recommended nor necessary and will only promote weeds and other unwanted plant species.

Guidance for specification option:

Access Irrigation Ltd is one of the country’s longest established irrigation specialists and has considerable experience in green roofs. They can provide irrigation advice on any Bauder project and can supply a wide range of irrigation products.

Please contact:

Access Irrigation Ltd

Crick Northampton NN6 7XS

T: 01788 823811 F: 01788 824256

E: sales@access-irrigation.co.uk

www.access-irrigation.co.uk

Guidance for specification option:

Bauder Ltd offers a professional maintenance service using experienced green/ blue roof technicians and can provide an estimate for carrying out on-going maintenance. Please contact manufacturer green roof maintenance team on Tel: 01473 257671. Alternatively, the work can be contracted to experienced landscape contractors of choice.