BskyB Headoffices

Wildflower Semi intensive roof

Eco green roofs were contracted to design, supply and install the new green roofs at Sky’s head offices. the green roofs had a large range of wildflowers planted into 200 mm of green roof growing medium.

The Eco green roof specification is below

Q37

Semi Intensive Green Roof

  • Roof Type : Eco Green Roof Wildflower Plug Plant roof System

-Substrate: Root – resistant waterproofing or aluminium (by others)

-Slope: 0-8 Degrees

  • Waterproofing: As J41
  • Thermal Insulation: as J41
  • Protection: Root resistant waterproofing (by others)
  • Moisture contril layers:

-Eco 300mm Moisture Retention/protection Mat as clause 340

-Eco Drainage/Retention Layer as clause 350

-Eco Filter sheet as clause 360

 

  • Growing Medium: Eco Semi Intensive Substrate as Clause 380

-Depth 150mm + 20% Settlement factor

  • Vegetation: Eco Wildflower, grass and herb plugs and seed,5% minimum coverage on installation as clause 400
  • Accessories:

-Upstand protection fleece: – as Clause 330

-Nutrient – as Clause 380

-Edge retaining profile – as clause 420

-Inspection chamber – as clause 430

-Vegetation barrier – as clause 440

 

Performance

 

General Design

  • Green roof and associated features: Complete the detailed design.
  • Proposals: Submit drawings, technical information, calculations and manufacturer’s literature.
  • Performance criteria: Instant green coverage on roof

 

Characteristic Roof Loads

  • Dead loads:

-Roof structure, screed and waterproofing

-Green roof layers: 1.69 kN per square meter (saturated)

  • Imposed roof loads

-Activity

-Vegetation

-Allowance for additional loads during construction

 

  • Service loads:
  • Snow Loads:
  • Other loads:
  • Requirement: Restrict site activities to ensure that design loads are not exceeded, or submit proposals for temporary supports.

Products

Upstand Protection Mat

  • Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: ecogreenroofs.co.uk
  • Material: Blended Polyester Mat

-Thickness:2mm

-Weight 300g/m2

 

Moisture Retention/Protection Mat

  • Manufacturer: Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: www.ecogreenroofs.co.uk
  • Material – Non rotting, biumen – compatible geotextile fleece- backed,recycled polypropylene mat.

-Capacity: 2l/m2

Drainage Layer

  • Manufacturer: Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: www.ecogreenroofs.co.uk
  • Material: Thermoformed recycled polypropylene

-Depth:30mm

-Retention Volume: 4.3l/m2

-Horizontal flow rate: 1.25 l/s/m2

-Vertical flow rate: 8 l/s/m2

Compressive strength:150 kPa

  • Infill: Not required

 

Filter Membrane

  • Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: www.ecogreenroofs.co.uk
  • Material: Thermally – Strengthened polypropylene

-Mass 0.120kg/m2

Semi Intensive Growing Medium

  • Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: www.ecogreenroofs.co.uk
  • Material: Light weight site formulated, crushed brick & expanded clay growing substrate. In –Organic & organic substrate consisting of crushed brick, expanded clay & organic matter of composted bark fines
  • Depth: 150mmm (plus settlement allowance 20%)
  • Ameliorant/conditioner: Osmocote Pro 8-9 months fertiliser by Eco Green Roofs

-Coverage: 25 gm/m2

  • Declaration of analysis: Submit.
  • Parameters: Prosity: 63%
  • Water Holding Capacity: 35% – 45%
  • Bulk Density DIN EN 1097-3: 0,85 – 0,90 to /m3
  • Weight by max water capacity: 1,10 to /m3

Vegetation

  • Manufacturer: Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: www.ecogreenroofs.co.uk
  • Planting mix: Wildflower Species
  • Vegetation coverage: 5% minimum

Edge Retaining Profile

  • Manufacturer: Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: www.ecogreenroofs.co.uk
  • Material: Aluminium
  • Height: 180mm

Inspection Chambers

  • Manufacturer: Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: www.ecogreenroofs.co.uk
  • Material: Black,plastic – coated steel
  • Size: 250x250mm Depth 80mm
  • Access Covers: Black, plastic coated steel with handle
  • Features: 500x 500mm flange attached for stability and to lap filter sheet

 

Vegetation Barrier

  • Material@ Rounded washed pebbles (20-40mm)
  • Depth: 70mm
  • Width: 300mm
  • Void Filler:
  • 100mm deep
  • 300mm wide

Execution

Installation Generally

  • Preparation: Clear all surfaces of debris.
  • Timing: After certification of waterproof membrane integrity.
  • Surface condition: Visually inspect waterproof membrane, report any damage.
  • Faults in waterproof membrane: Report
  • Contamination: Do not use materials detrimental to healthy plants growth.
  • Storage: Do not overload – point loads avoid
  • Outlets: Do no block. – Outlet grilles: Installed

Adverse Weather

  • Unfinished work: Secure for damage and wind uplift
  • Conditions: Do not install or work with frozen materials

Upstand Protection Mat Insulation

  • Extent: Loose lay continuously around perimeter, upstands and penetrations.
  • Joints: Minimize.
  • Overlaps (minimum): 150mm
  • Upstands: Eco Green roofs fleece to fit closely around penetrations and outlets

Moisture Retention/Protection Mat Installation

  • Extent: Loose lay continuously over entire roof area.
  • Joints: Minimze.
  • Overlaps (Minimum):150mm
  • Upstands: Eco Green roofs fleece to fit closely around penetrations and outlets

Drainage Layer Installation

  • Extent: Loose lay continuously over entire roof area.
  • Fitting: Closely butt- joint boards.
  • Upstands: Cut to fit closely around penetrations and outlets, using a heavy duty knife or smooth – toothed saw.

 

Filter Membrane Installation

  • Joints: Minimize.
  • Overlaps (minimum): 150mm
  • Fitting: Loose Laid

Growing Medium Installation

  • Handling: Minimize handling. Deliver to roof in small sacks, bulk bag or pump, spreading the specified depth on to filter sheet, allowing the settlement factor of 20%
  • Conditions: Handle in the driest condition possible. Do not handle or install when wet or frozen
  • Layers:
  • Depth(Max): 150mm

Sequence: Use grading bars to achieve the correct depth. Gently firm each layer before spreading the next. Apply pre-formulated nutrient regrime according to planting plan and rake in.

Vegetation Installation

  • Handling Plug:
  • Extent: Continuous over area to be planted.
  • Timing: To be installed during the spring or Autumn
  • Storage: must be stored in a cool and shaded area
  • Application
  • Wildflower and grasses plug plant. To be installed within 48 hours of delivery. Plug plants hand – planted into the growing medium. 20 plugs per sqm. Irrigated to saturation.
  • Watering: Thoroughly, after laying account for climatic variation and seasonality

Edge Retaining Profile Installation

  • Cutting: Neat, accurate and without spalling
  • Junctions: vertical, secured using proprietary connectors.
  • Position: True to line and level. Smooth continuous lines.
  • Fixing: Loose laid onto 300g protection fleece, ballasted by weight on foot plate.
  • Suitable for pitched roofs of 5 degrees or less

Inspection Chamber Installation

  • Location: Install centrally over drain outlet.
  • Orientation: Align parallel with adjacent features
  • Bedding: Position flanges on to crowns of drainage layer.
  • Backfill: Ballast flanges with pebbles
  • Surround: 300mm diameter circle/square of 20-40 rounds pebbles

 COMPLETION

Inspection

  • Timing: Before handover.

-Give notice (minimum):3 days

Completion

  • General: Leave the works in a clean, tidy, condition.
  • Surfaces: Clean immediately before handover
  • Outlets: Clean and clear of obstructions
  • Completed green roofs: Protect from adjacent or high level working

Documentation

  • Timing: Submit at handover.
  • Contents
  • Growing medium declaration of analysis
  • Manufacturers gurantees and warranties
  • Procedures for maintenance of green roof
  • Record drawings the location of planting and associated features
  • Number of copies:

Semi – Intensive Plug Plants

Core Species Additional; Species for consideration
Sedum floriferum ‘Weihenstephaner Gold’ Achillea millefolium
S.hybridum ‘Immergrunchen’ Allium schoenoprasum
S.reflexum Allium schoenoprasum
S.Sexangulare Ajuga reptans
S.spurium pink red and white Anthyllis vulneraria
S.telephium ‘herbstfreude’ Armeria maritime
Allium tuberosum Briza media
Aster amellus Campanula rotundifolia
Carex Humilis Centaurea cyanus
Carex ornithopoda Cerastium tomentosum
Dianthus carthusianorum Dianthus armeria
Dianthus deltoids Echium Vulgare
Dianthus gratianopolitanus Elymus magellanicus
Festuca amethystine Festuca ovina
Helianthemum nummulatium Galium verum
Helicotrichon sempervirens Gypsophila repens
Lavandula angustifolia Hieracium aurantiacum
Melica ciliate Hieracium pilosella
Oenothera missouriensis Hypoecharis radicata
Origanum vulgare Knautia arvensis
Pennisetum alopecuroides ‘compressum’ Leontodon atumnails
Prunella grandiflora Leucanthemum vulgare
Saxifraga paniculata Linaria alpine
Teucrium chamaedrys Linaria purpurea
Thymus Vulgaris Linaria repens
  Linaria vulgaris
  Scabiosa columbaria
  Silene dioica
  Silene maritime
  Silene noctiflora
  Silene vulgaris
  Thymus serpyllum

 

building has over 300m2 of green roofs which keeping in with the phrase ‘believe in better’

 

 

 

Q37

Semi Intensive Green Roof

  • Roof Type : Eco Green Roof Wildflower Plug Plant roof System

-Substrate: Root – resistant waterproofing or aluminium (by others)

-Slope: 0-8 Degrees

  • Waterproofing: As J41
  • Thermal Insulation: as J41
  • Protection: Root resistant waterproofing (by others)
  • Moisture control layers:

-Eco 300mm Moisture Retention/protection Mat as clause 340

-Eco Drainage/Retention Layer as clause 350

-Eco Filter sheet as clause 360

 

  • Growing Medium: Eco Semi Intensive Substrate as Clause 380

-Depth 150mm + 20% Settlement factor

  • Vegetation: Eco Wildflower, grass and herb plugs and seed,5% minimum coverage on installation as clause 400
  • Accessories:

-Upstand protection fleece: – as Clause 330

-Nutrient – as Clause 380

-Edge retaining profile – as clause 420

-Inspection chamber – as clause 430

-Vegetation barrier – as clause 440

 

Performance

 

General Design

  • Green roof and associated features: Complete the detailed design.
  • Proposals: Submit drawings, technical information, calculations and manufacturer’s literature.
  • Performance criteria: Instant green coverage on roof

 

Characteristic Roof Loads

  • Dead loads:

-Roof structure, screed and waterproofing

-Green roof layers: 1.69 kN per square meter (saturated)

  • Imposed roof loads

-Activity

-Vegetation

-Allowance for additional loads during construction

 

  • Service loads:
  • Snow Loads:
  • Other loads:
  • Requirement: Restrict site activities to ensure that design loads are not exceeded, or submit proposals for temporary supports.

Products

Upstand Protection Mat

  • Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: ecogreenroofs.co.uk
  • Material: Blended Polyester Mat

-Thickness:2mm

-Weight 300g/m2

 

Moisture Retention/Protection Mat

  • Manufacturer: Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: www.ecogreenroofs.co.uk
  • Material – Non rotting, biumen – compatible geotextile fleece- backed,recycled polypropylene mat.

-Capacity: 2l/m2

Drainage Layer

  • Manufacturer: Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: www.ecogreenroofs.co.uk
  • Material: Thermoformed recycled polypropylene

-Depth:30mm

-Retention Volume: 4.3l/m2

-Horizontal flow rate: 1.25 l/s/m2

-Vertical flow rate: 8 l/s/m2

Compressive strength:150 kPa

  • Infill: Not required

 

Filter Membrane

  • Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: www.ecogreenroofs.co.uk
  • Material: Thermally – Strengthened polypropylene

-Mass 0.120kg/m2

Semi Intensive Growing Medium

  • Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: www.ecogreenroofs.co.uk
  • Material: Light weight site formulated, crushed brick & expanded clay growing substrate. In –Organic & organic substrate consisting of crushed brick, expanded clay & organic matter of composted bark fines
  • Depth: 150mmm (plus settlement allowance 20%)
  • Ameliorant/conditioner: Osmocote Pro 8-9 months fertiliser by Eco Green Roofs

-Coverage: 25 gm/m2

  • Declaration of analysis: Submit.
  • Parameters: Prosity: 63%
  • Water Holding Capacity: 35% – 45%
  • Bulk Density DIN EN 1097-3: 0,85 – 0,90 to /m3
  • Weight by max water capacity: 1,10 to /m3

Vegetation

  • Manufacturer: Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: www.ecogreenroofs.co.uk
  • Planting mix: Wildflower Species
  • Vegetation coverage: 5% minimum

Edge Retaining Profile

  • Manufacturer: Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: www.ecogreenroofs.co.uk
  • Material: Aluminium
  • Height: 180mm

Inspection Chambers

  • Manufacturer: Manufacturer: Eco Green Roofs Ltd Unit 3 Rays Farm Barns, Ingatestone, Essex CM4 9EH Tel: 0800 6347035 Web: www.ecogreenroofs.co.uk
  • Material: Black,plastic – coated steel
  • Size: 250x250mm Depth 80mm
  • Access Covers: Black, plastic coated steel with handle
  • Features: 500x 500mm flange attached for stability and to lap filter sheet

 

Vegetation Barrier

  • Material@ Rounded washed pebbles (20-40mm)
  • Depth: 70mm
  • Width: 300mm
  • Void Filler:
  • 100mm deep
  • 300mm wide

Execution

Installation Generally

  • Preparation: Clear all surfaces of debris.
  • Timing: After certification of waterproof membrane integrity.
  • Surface condition: Visually inspect waterproof membrane, report any damage.
  • Faults in waterproof membrane: Report
  • Contamination: Do not use materials detrimental to healthy plants growth.
  • Storage: Do not overload – point loads avoid
  • Outlets: Do no block. – Outlet grilles: Installed

Adverse Weather

  • Unfinished work: Secure for damage and wind uplift
  • Conditions: Do not install or work with frozen materials

Upstand Protection Mat Insulation

  • Extent: Loose lay continuously around perimeter, upstands and penetrations.
  • Joints: Minimize.
  • Overlaps (minimum): 150mm
  • Upstands: Eco Green roofs fleece to fit closely around penetrations and outlets

Moisture Retention/Protection Mat Installation

  • Extent: Loose lay continuously over entire roof area.
  • Joints: Minimze.
  • Overlaps (Minimum):150mm
  • Upstands: Eco Green roofs fleece to fit closely around penetrations and outlets

Drainage Layer Installation

  • Extent: Loose lay continuously over entire roof area.
  • Fitting: Closely butt- joint boards.
  • Upstands: Cut to fit closely around penetrations and outlets, using a heavy duty knife or smooth – toothed saw.

 

Filter Membrane Installation

  • Joints: Minimize.
  • Overlaps (minimum): 150mm
  • Fitting: Loose Laid

Growing Medium Installation

  • Handling: Minimize handling. Deliver to roof in small sacks, bulk bag or pump, spreading the specified depth on to filter sheet, allowing the settlement factor of 20%
  • Conditions: Handle in the driest condition possible. Do not handle or install when wet or frozen
  • Layers:
  • Depth(Max): 150mm

Sequence: Use grading bars to achieve the correct depth. Gently firm each layer before spreading the next. Apply pre-formulated nutrient regrime according to planting plan and rake in.

Vegetation Installation

  • Handling Plug:
  • Extent: Continuous over area to be planted.
  • Timing: To be installed during the spring or Autumn
  • Storage: must be stored in a cool and shaded area
  • Application
  • Wildflower and grasses plug plant. To be installed within 48 hours of delivery. Plug plants hand – planted into the growing medium. 20 plugs per sqm. Irrigated to saturation.
  • Watering: Thoroughly, after laying account for climatic variation and seasonality

Edge Retaining Profile Installation

  • Cutting: Neat, accurate and without spalling
  • Junctions: vertical, secured using proprietary connectors.
  • Position: True to line and level. Smooth continuous lines.
  • Fixing: Loose laid onto 300g protection fleece, ballasted by weight on foot plate.
  • Suitable for pitched roofs of 5 degrees or less

Inspection Chamber Installation

  • Location: Install centrally over drain outlet.
  • Orientation: Align parallel with adjacent features
  • Bedding: Position flanges on to crowns of drainage layer.
  • Backfill: Ballast flanges with pebbles
  • Surround: 300mm diameter circle/square of 20-40 rounds pebbles

 

 

COMPLETION

Inspection

  • Timing: Before handover.

-Give notice (minimum):3 days

Completion

  • General: Leave the works in a clean, tidy, condition.
  • Surfaces: Clean immediately before handover
  • Outlets: Clean and clear of obstructions
  • Completed green roofs: Protect from adjacent or high level working

Documentation

  • Timing: Submit at handover.
  • Contents
  • Growing medium declaration of analysis
  • Manufacturers gurantees and warranties
  • Procedures for maintenance of green roof
  • Record drawings the location of planting and associated features
  • Number of copies: