Technical Green Roof Specifications

8/6/2019 Technical Green Roof Specifications

http://slidepdf.com/reader/full/technical-green-roof-specifications 1/15

Tellus 360 Joe Devoy Green Roof Project

24 East King Street Lancaster, PA 17602

Green Roof Service LLC210 N. Hickory Av.

Bel Air Maryland 21014 USA

Mail :Jörg Breuning202 Kimary Ct. 3D

Forest Hill Maryland 21050 +1 443-345-1578 +1 443-345-1533

[email protected] www.greenroofservice.com

Technical Green Roof Specifications This specification is an instrument of professional

services and shall not be modified, copied or used

for other projects without written consent of

Green Roof Service LLC. April 26, 2011/jbi










PART 1 ‐ GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract apply to this Section.

1.2 SUMMARY

A. This Specification includes the following:

a) Protection for the existing roof: Provide a separation fabric and a root resistant PE

membrane.

Protecting

the

existing

waterproof

membrane

has

to

be

first

priority

and any suspected or visible impact of the waterproof membrane shall be

reported to the construction supervisor immediately.

b) Green roof system: Provide a complete green roof system as indicated on the

drawings, moisture retention/ protection fabric, inspection boxes, drainage plates,

filter fabric, extensive soil layer, plants, and drainage stone.

c) Maintenance of the green roof for the period of two years.

d) Patios and maintenance path: Provide concrete pavers including bedding

materials for patios and maintenance path as indicated in the drawings.

e) Mobilization: Provide all labor, materials, logistics, services and equipment as

necessary to supply and execute the project, including temporary traffic barriers

and unloading area at street level, a crane needed to lift materials, dumpsters,

and permits and approvals required for execution of the project.

1.3 DEFINITIONS

a) Separation fabric ‐ A fabric which separates the existing roof membrane from the

root barrier.

b) Root barrier ‐ A non‐reinforced PE Membrane usually used as a separation with 6

feet overlapping. Typical 20 mil thick

c) Separation‐ and protection mat – A fabric which separates the root barrier from

the green roof system and protects the root barrier from mechanical impact. An

additional function is to store water.










d) Inspection box – A box with a lid installed over the roof drain which allows water

to flow into the drain but keeps other materials away from it. Lid must be

removable for maintenance purposes.

e) Gravel Board – A L‐shaped piece of metal separating different materials

horizontally.

f) Drainage Plate – A material which retains rainwater creates sufficient air space

and allows excess water to run off.

g) Filter Fabric – A material which creates a separation between the soil media and

the drainage layer. Fines and organic particles cannot pass the fabric. Roots are

able to grow thru.

h) Extensive Soil Layer – An engineered growing media containing light weight

mineral and organic components.

i) Drainage Stone – A coarse and heavy material which is used at all edges of the

green

roof

to

increase

ballast

load

and

drainage

along

surrounding

walls.

j) Pavers – A material which is used as surface for patios and terraces.

k) Bedding – A granular material which is used in between the drainage plate and

the pavers for leveling.

l) Plugs – Plants cultivated in multi cell plates. The size of the cells is determined by

the number of cells per plate.

m) Cuttings – plant propagation material which is gained by cutting off parts of

certain plants like Sedum for example. Cuttings should not contain flower stock.

1.4 QUALITY ASSURANCE

a) Green roof system provider must have a minimum of five years experience in the

installation of green roof systems.

b) There is a single source responsibility for each layer of the green roof system.

c) Alternative materials can only be accepted, if they are proven equivalent to the

ones specified in Part 2. Samples, specifications and test reports of alternative

materials have to be submitted with the proposal.

d) Green Roof Service LLC will supervise the green roof installation and give

instructions if necessary.










1.5 DELIVERY, STORAGE, AND HANDLING

a) There is no space for storage on the ground and only limited space for storage on

the roof. All bulk materials have to be delivered just in time for installation.

b) Materials shall be stored in a neat, safe manner, not to exceed the allowable

structural capacity of the storage area which is 100 lb/sqf.

c) Living components (plants and sedum cuttings) shall be planted immediately after

delivery.

PART 2 ‐ PRODUCTS

2.1 MATERIALS

A. Separation Fabric.

6 once per square yard (200 g/m2

) needle‐punched staple fiber non‐woven

geotextile. Material: mechanically solidified plastic fibers

Product: optigreen separation‐and protection mat 200 or equivalent

Supplier: Resource Conservation Technology Inc. (410‐366‐1146)

B. Root Barrier.

Material: PE, 20 mil thickness or more overlapping 6 foot

Suggested Product: PE RTC – Conservation technology.

C. Separation‐ and Protection Mat.

15 once per square yard (500 g/m

2

) needle‐punched staple fiber non‐woven

geotextile. Material: mechanically solidified plastic fibers

Product: optigreen separation‐and protection mat 500 or equivalent

Supplier: Resource Conservation Technology Inc. (410‐366‐1146).










D. Gravel Board.

L‐shaped Aluminum board with holes for water penetration and with connectors

to avoid gaps.

Material: Aluminum 1.5 mm thick Dimension: 4” high, 6” wide

Product: optigreen gravel board or equivalent


E. Inspection Box.

Squared inspections box made out of UV‐protected ABS‐plastic with lateral water

flow holes. Lid as lockable cover with holes for surface water runoff.

Dimension: 1’ x 1’, 4” high

Product: optigreen control shaft or equivalent


F. Drainage Plate.

Drainage plate made out of recycled HDPE with holes for ventilation and

diffusion.

Height: 1” Weight: 1.5 kg/m2

Water holding capacity: 3.6 – 5.0 l/m²‐

kg/m²

Product: optigreen drainage plate FDK 25 or equivalent


G.

Filter

Fabric.

Mechanically solidified polypropylene fleece.

Dry weight: 6 once per square yard (200 g/m2

).

Product: optigreen filter fleece type200 or equivalent.











H. Extensive Soil Layer.

The following growing media is an engineered soil for extensive green roofs in

multi‐course construction according to the German FLL‐Guidelines. The material

is a mixture of mineral and organic components that satisfies the following

specifications:

Granulometric distribution

‐ passing US # 100 (d=0.15 mm) < 22 mass %



‐ passing US # 16 (d=1.18 mm) 12 – 55 mass %



‐ passing US 3/8 (d=9.50 mm) 80 – 100 mass %

‐ proportion of slurry‐forming components (d < 0.063 mm) < 15 mass %

Apparent density (volume weight):

‐ when dry < 0.90 g/cm³

‐ at maximum water capacity < 1.30 g/cm³

Water and air management: ‐ maximum water capacity > 35% Vol.%

‐ air content at maximum water capacity > 10% Vol.%

‐ air content at pf 1,8 > 25% Vol.%

‐ water permeability mod. Kf

> 0.6 mm/min

pH value, salt content: ‐ pH value (in CaCl2) 6.5 – 8.0

‐ salt content (water extract) < 3.5 g/l

‐ salt content (gypsum extract) < 2.5 g/l

Organic substances: ‐ organic content < 6.0 mass %

Additional requirements: ‐ absence of any phytotoxic substances

‐ absence of seeds capable of germination

‐ absence of plant parts capable of regeneration

‐ absence of foreign substances

‐ fire resistance

‐ frost resistance

Suggested Product: Rooflite

extensive or equivalent,

Manufacturer: Skyland USA LLC

P.O. Box 640 Avondale PA 19311

1‐ 877‐268‐0017

www.skylandusa.us

For alternative products a FLL certificate and a material sample are required.










I. Drainage Stone.

Crushed Stone strip along parapet and penthouse walls:

Aggregate Type: Crushed Stone

Classification: Ingenious origin, Gran Diorite (Trap Rock)

Type: Havre de Grace #3 Stone or equivalent

Suggested Supplier: The Arundel Corporation (410‐575‐6587)

J. Pavers.

Concrete pavers for patios and maintenance path.

Dimensions: 2’ x 2’ x 2”

Color: grey

Suggested supplier: Hanover Pavers: 240 Bender Road Hanover, PA 17331

email : [email protected]

K. Bedding.

Bedding Material should consist of frost resistant lightweight aggregate like

expanded shale or expanded clay. Particle size: 3/16 – 1/4” or

“Roof Block” system http://www.roofblok.com/index.htm

2.2 PLANTS

A. Plant List ‘extensive’

‐ Sedum hybr. ‘Immergrünchen’ 72 cell plug 720 pcs.

‐ Sedum album 72 cell plug 720 pcs

‐ Sedum album ‘Murale’ 72 cell plug 720 pcs

‐ Sedum fl. ‘Weihenstephaner Gold’ 72 cell plug 720 pcs

‐ Sedum kamtschaticum 72 cell plug 720 pcs

‐ Sedum reflexum 72 cell plug 720 pcs

‐ Sedum sexangulare 72 cell plug 720 pcs

‐ Sedum spurium ‘Fuldaglut’ 72 cell plug 720 pcs

‐ Sedum spurium ‘White Form’ 72 cell plug 720 pcs










B. Optional: Plant List ‘semi‐intensive’

‐ Allium schoenoprassum 72 cell plug 144 pcs

‐ Allium tenescens 72 cell plug 144 pcs

‐ Dianthus carthusianorum 72 cell plug 216 pcs

‐ Dianthus ‘Fire Witch’ 72 cell plug 216 pcs

‐ Hieracium pilosella 72 cell plug 216 pcs

‐ Talinum calycinum 72 cell plug 144 pcs

Grasses

‐ Bouteloua curtipendula Quart 50 pcs

‐ Calamagrostis ac. 'Karl Foerster' Quart 100 pcs

‐ Sporobolus heterolepsis Quart 30 pcs

C. Sedum cuttings: total quantity 50 lb

‐ Sedum album 20%

‐ Sedum album ‘Murale’ 20%

‐ Sedum reflexum 20%

‐ Sedum sexangulare 20%

‐ Sedum spurium ‘Fuldaglut’ 10%

‐ Sedum spurium ‘Roseum’ 10%

Suggested Supplier for plants and cuttings: www.greenroofplants.com










PART 3 ‐ EXECUTION

3.1 GENERAL

a. All components are to be installed by a single contractor. The various layers shall be

installed in such a manner that previously installed components don’t get damaged

or punctured.

b. A representative of Green Roof Service LLC will supervise the installation.

3.2 EXAMINATION

a. Prior

to

submitting

a

bid

and

again

prior

to

beginning

work,

the

contractor

shall

visit

the site to become familiar with the existing conditions. Examine supporting

substrates before installation of root barrier and green roof system.

1. Proceed with installation only after unsatisfactory conditions have been

corrected.

2. Protecting the waterproof membrane has to be first priority and any suspected or

visible impact of the waterproofing membrane must be reported to the

construction supervisor immediately.

3.3 DELIVERY, STORAGE AND HANDLING

a. Deliver materials in original, unopened packaging.

b. Ship all materials and plants just in time to minimize on‐site storage.

c. Store materials so that the structural capacity of the roof deck is not exceeded.

d. Store the materials within the environmental conditions recommended by the

manufacturer.

e. Remove damaged materials from the site promptly, and replace with new

materials.

f. Keep the surface of the waterproofing system always clean.

g. Heavily traveled areas must be protected in a manner approved by the site

supervisor.










3.4 SEPERATION FABRIC

a. Install separation fabric on top of the existing bituminous waterproofing

membrane.

b. Overlap seams at least 4 inches.

c. Parapet and penthouse walls shall be covered‐up 3 inches high from the horizontal

surface of the roof.

d. Use scissors instead of knifes for any cutting of the fabric.

3.5 ROOT BARRIER

a. PE Membrane must be installed in accordance with current product specifications,

details and workmanship requirements. Overlap 6 feet.

b. PE Membrane will not be adhered or mechanically attached, but will be ballasted

by the green roof system.

c. Temporary ballast has to be provided, installed and removed, if the green roof

system is not being installed directly after the installation of the membrane.

d. Temporary ballast has to be sufficient to keep the membrane in place in case of a

storm event. Plastic containers filled with water may be used for that purpose.

e. Parapet and penthouse walls shall be covered‐up 3 inches high from the horizontal surface of the roof.

f. Use scissors instead of knifes for any cutting of the membrane.

3.6 SEPERATION‐AND PROTETION FABRIC

a. Install separation‐ and protection fabric on top of the complete waterproofing

system.

b. Overlap seams at least 4 inches and tack seams using a hot‐air welding gun or water

the fabric to hold the fabric in place.

c. Parapet and penthouse walls shall be covered‐up 3 inches high from the horizontal

surface of the roof.

d. Use scissors instead of knifes for any cutting of the fabric.










3.7 INSPECTION BOX

a. Install inspection box on the roof drain according to the instructions of the

manufacturer.

b. Protection fabric shall be between inspection box and root barrier.

3.8 GRAVEL BOARD

a. Place perforated aluminium edging according to the drawings and the instructions

provided on site by the representative of Green Roof Service LLC.

b. Elements have to be aliened properly and connected for stability.

c. If cutting is necessary use appropriate tools to cut the edging.

3.9 DRAINAGE PLATES

a. Place drain plates on top of the separation‐and protection mat according to the

instructions of the manufacturer

b. Avoid gaps in between the plates.

c. Use scissors instead of knifes for any cutting of the drainage plates.

3.10 FILTER FABRIC

a. Cover drainage plates with filter fabric.

b. Overlap seams at least 4 inches and water the fabric to hold the fabric down in

place.

c. Use scissors instead of knifes for any cutting of the fabric.

d. Avoid walking on the filter fabric and the drainage surface as far as possible. Protect

often used areas with plywood or other equivalent materials.










3.11 EXTENSIVE SOIL LAYER

a. Place the extensive soil layer on the filter fabric. The media shall be dispensed at

the roof level in a manner that will not suddenly increase the load to the roof.

b. Level the extensive soil to the following thickness after compaction:

3” deep along the gravel board

3” – 4” in a strip 2 feet wide along the gravel board

4” deep in all other green roof areas

c. Optional:

Level additional extensive soil in all areas classified as semi‐intensive in the

drawings to a total thickness of the media of 5” after compaction. The size of the

optional semi‐intensive green roof area is 400 sqf.

d. Minimize walking on the leveled surface of the extensive soil as far as possible.

Protect often used areas with plywood or equivalent materials.

3.12 GRAVEL STRIP

a. Place the drainage stone as shown in the drawings. The washed stone shall be

dispensed at the roof level in a manner that will not suddenly increase the load to

the roof.

b. Level the drainage stone to the thickness of 3 inches in all mentioned areas.

c. Avoid contamination of drainage stone with extensive soil medium or sedum

cuttings.

3.13 PAVERS

a. Place the bedding material directly onto the drain plates and level it out to an even

layer of 2’.

b. Additional bedding material has to be calculated to fill up the drain plates.

c. Place the pavers on top of the bedding as shown in the drawings.

d. The finished surface of the paved area has to be smooth and even without gaps in

between the pavers.










3.14 PLANTING

a. A representative of Green Roof Service LLC will create the layout pattern for

different plant species on site.

b. Install plugs according to layout pattern.

c. The plugs shall be set into the extensive soil medium to their full depth and the

media pressed firmly around the installed plug.

d. Avoid walking on planted areas.

e. Eliminate foot prints in planted areas.

f. Soak planted areas thoroughly with water.

3.15 SPREADING OF CUTTINGS

a. Mix all cuttings before spreading them.

b. Broadcast cuttings evenly on the surface of the growing medium. Use 1 lb of

cuttings for every 60 sqf of green roof area. Areas will be determined on site by

Green roof Service LLC.

c. Avoid contamination of surrounding areas, especially of the gravel strip.

d. Use

a

wooden

hey

rake

to

work

sedum

cuttings

into

the

surface

of

the

growing

medium.

e. Soak treated areas thoroughly with water.

3.16 MAINTENANCE

A. Irrigation.

a. The goal is to avoid damage due to drought and to get drought resistant vegetation

at the same time. There is no way to predict the exact effort which might be

necessary, since local weather conditions have a strong influence.

b. Within the first couple of weeks periods without considerable rain or irrigation

shouldn’t be longer than two or three days depending on the temperature.

c. After two weeks, when plants have started to grow into the medium periods

without rain or irrigation can be slowly extended.










d. After 4 months irrigation can be reduced to a minimum. Once plants have fully

established they can tolerate periods of drought lasting several weeks.

B. Weeding.

a. The goal is to avoid weeds reaching the roof get a chance to grow and spread seeds.

b. Greenroofs are a piece of nature and are built with natural materials. Although

material suppliers try to eliminate weed seeds as good as possible contamination

cannot be avoided completely. Some seeds might even be airborne.

c. For the first couple of month after installation the green roof should be checked

weekly for weed growth. Pull all weeds by hand and put them in a plastic bag or

container to avoid spreading seeds.

d. After the initial phase weeding should be done at least once a month. Monthly

weeding is only necessary from March to October.

e. Chemical weeding is not allowed.

C. Pruning and Trimming.

a. Pruning and trimming as needed to maintain proper appearance and plant health.

D. Feeding.

b. Feed with organic fertilizer every 3 month max. 5 oz per 100 square foot only

between March and September.

E. Plant Replacement.

a. Remove and replace dead plants immediately.

b. Repeat the spreading of cuttings in areas where initially broadcasted sedum

cuttings fail to grow.

F.

Duration.

Maintenance

covered

by

this

contract

will

end

two

years

after

installation.

END OF SPECIFICATION









[email protected] f i

Appendix:

April 26, 2011/jbi 15p

Technical Green Roof Specifications

Documents

Transcript of Technical Green Roof Specifications