Our purpose in this research is to provide information on various green roof systems, the maintenance involved, and how to secure funding for the implementation of a Green Roof at The Summit United Methodist Church.
1. General Benefits of a Green Roof 2. Benefits of comparable modular tray systems
a) Live Roof b) Green Roof Block c) Carlisle/Green Grid Systems
3. Maintenance Plan 4. Rainwater collection feature 5. Green Wall option 6. Cost 7. Alternatives to a green roof 8. Funding 9. References
• Decreases heating and cooling load – Increases thermal resistance
value of roof and cooling roof by evaporation
• More than doubles life of roofing membrane – Protects membrane from harmful
UV rays, punctures, and extreme temperature fluctuations
• Reduces the amount of storm water runoff from a building’s roof
• Materials absorb rain water and releases it over time
• Plants filter pollutants creating cleaner runoff
• Michigan State University Study
Green roof water amount retained: 60-100%
• Support local wildlife – Increases amount of
local plants – Cuts down on lost
vegetative space – Encourages
biodiversity
• Implement an outreach program within the church – Community volunteers giving back – Create a sense of self-worth and pride – Helps a nonresidential building blend in with
the neighborhood – Improves aesthetics of neighborhood
• Specs‐2’x2’x4”pre‐vegetatedaluminumtrays
‐Accommodatesgrowthmediadepthsrangingfrom4”to11”
‐65yrlifeexpectancy
‐12‐18lb/ft² Greenroofblock.com
• Benefits‐Installeddirectlyontoroof
‐Mobileforroofmaintenanceotherpurposes
‐$25/ft²includinginstallationandshipping
Children’s Museum
Pittsburgh
• 1’ x 2’ pre-vegetated plastic trays
• 27-29 lb/ft² fully saturated • $18-$22/ft² including
installation – Excludes water membrane
• Less than $1/ft²
• Non Compartmentalized – edges are never visible
liveroofs.com
**FutureProjects:FranklinCountyCourthouseSpring2010
• Maintenance – Annual soil testing and
Fertilization – Watering when less than 1”
of rainfalls during a 2 to 4 week period when it is 75 degrees or hotter
– Biweekly weeding during Spring and Fall growing seasons
– $0.15 to $0.30 annually liveroofs.com
• Carlisle Protection Fabric ( CCW-200V) – Installed directly on exiting membrane roof
• Planted Modular Trays – 24” x 48” – 24” x 24”
• New roofing membrane application would be needed before this system or other green roofs systems were installed to keep the existing roof warranty
• Maintenance Plan – Despite such claims,
there is no such thing as a maintenance-free green roof.
– Do not let your maintenance plan go ignored
• Maintenance Contracts – 3-5 years – Typically established with
the green roof installer, who – Installers most likely cover
the warranty of your green roof
• How Frequent? – During establishment
period (18-24 months) • 4-6 routine maintenance
visits are required to insure survival of the vegetated cover
– Establishment period will be less with pre-vegetated modular trays (Live Roof).
• Watering – The plants selected for a project should be
drought tolerant. – Periodic hand watering during the
establishment period and afterwards but only in sustained drought
• Drainage – Visually and manually check drains for clogs
every 4-6 months
• Weeding – Every 4-6 months after establishment period
recommended – Hand pruning should be used
• No digging or using pointed tools
• Fertilizer – Soil tests should be conducted each spring in
order to assess plant nutritional requirements. – The nutrient applications should be made in
early spring and fall.
Rainwater Data
• 1000 ft² = 623 gallons – 1 inch rainfall
• 1700 ft² = 1059 gallons (Approximate)
• Need: 4 tanks to hold optimum water storage
Tank Specs
• $315 (on sale for $206) • 305 gallons • Diameter: 46 inches • Height: 49 inches • Weight: 64 LBs
• Each tank empty = 64 LBs • 305 Gallons x 8.35LBs/gallon = 2546 LBs • 2546 LBs + 64 LBs = 2610 LBs per tank • Weights
– 1 tank: 2610 LBs – 2 tanks: 5220 LBs – 3 tanks: 7830 LBs – 4 tanks: 10,440 LBs
• Modular tray system attaches to wall
• Growing medium included
• Can use reclaimed water
• Modular trellis system
• Can be wall hung or freestanding
• Plants typically grow from base of wall and vine up the trellis
Stage 1: Outlined in yellow, is approx. 1160 ft²
• Improve HVAC operation by reducing heat island effect on roof. • Approximately 10% of section is occupied by equipment.
Stage 2: Outlined in red, is approx. 1600 ft²
• Provide additional benefits described previously.
• Modular – Live Roof- $20/ ft² – Green Roof Blocks - $25/ ft² – Green Grid System (Carlisle) $12.50 to $ 13.00 per ft²
• Conventional – Tremco - $15-25/ ft² – Greenscapes - $8 - $10/ ft²
• Green Wall - $9-$12/ ft² • G-Sky wall system $100 or more/ ft² • Leak detection - Electronic Vectormapping $0.75 / ft² • (4) x 305 gallon water cisterns - approx. $824 ($206 each) • Reflective roof ranges from $0.75 to $3.00/ ft²
• Reflective coating applied to existing roof
• Helps keep roof cool by reflecting sun’s rays back into space
• Can reflect 80% of sun’s rays and reduce roof temperature by up to 80 degrees
• Cost and Maintenance – $0.75 to $3.00/ ft² for materials and
installation – Extends life of existing roof up to 15
years – Requires little maintenance
(occasional cleaning or reapplication)
(links included in report)
1. United Methodist Women – A Brighter Future for Children and Youth
2. United Methodist Global Ministries – Outreach to Meet Human Needs
3. Tomorrow's Leaders II Scholarship Program and Recruitment
4. Ethnic Local Church Concerns (ELLC) 5. EPA Environmental Education Grants 6. EPA 7th Annual P3 Awards: A National Student
Design Competition For Sustainability Focusing on People, Prosperity and the Planet
• http://www.greenroofblocks.com • http://www.asha.org/public/hearing/disorders/noise.htm • http://www.liveroof.com/ • http://rubbersheetroll.com> • LiveRoof Sales Representative for Franklin County:
– Dan Cartell Life Roof Sales Coros Perennials Cell: 216-408-9611
Email: [email protected] • http://www.hrt.msu.edu/greenroof/#Benefits of green roofs • http://www.greengridroofs.com/greenroofs.htm • http://www.coolroofs.org
