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Roofing Options for Roofing Options for Green BuildingsGreen Buildings
A Materials ComparisonA Materials Comparison
ContentsContents
UnderlaymentsUnderlaymentsLiving Roofs Living Roofs ExtensiveExtensive IntensiveIntensive
ShinglesShingles AsphaltAsphalt Cedar Cedar SlateSlate Recycled ContentRecycled Content
SteelSteel Standing SeamStanding Seam Corrugated Aluminum/SteelCorrugated Aluminum/Steel
UnderlaymentsUnderlayments
Asphalt Saturated Felt / Tar PaperAsphalt Saturated Felt / Tar Paper SyntheticSynthetic Self AdheringSelf Adhering
http://www.graceathome.com/pages/downloads/TriFlex_Brochure.pdf
Living RoofsLiving Roofs
Extensive Living RoofExtensive Living Roof Intensive Living RoofIntensive Living Roof
Green Grid SystemGreen Grid System
http://www.buildinggreen.com/auth/article.cfm?fileName=101106b.xml
Greengridroofs.com
http://www.greengridroofs.com/Pages/projects.htm
Asphalt ShinglesAsphalt Shingles
$40-$150/square$40-$150/square ≈≈2/3 new and existing 2/3 new and existing
roofsroofs Warrantees between Warrantees between
20 and 50 yrs.20 and 50 yrs. Some contain Some contain
preservatives and preservatives and moss inhibitors.moss inhibitors.
Low recyclability.Low recyclability.
Cedar ShakesCedar Shakes
$200-$300/square$200-$300/square Can last 30+ yrsCan last 30+ yrs Renewable Resource*Renewable Resource* High amount of High amount of
maintenance.maintenance. Often treated with Often treated with
preservatives and preservatives and moss inhibitors.moss inhibitors.
Slate ShinglesSlate Shingles
$900-$1200/square$900-$1200/square 700-900 lbs/square700-900 lbs/square Aesthetic ValueAesthetic Value Lifetime of 70-100 yrs, Lifetime of 70-100 yrs,
sometimes longer.sometimes longer. Minimal processing Minimal processing
required.required. No affect on water No affect on water
quality.quality.
Recycled Content ShinglesRecycled Content Shingles
$300-$600/square$300-$600/square Provide a similar look Provide a similar look
to slate, cedar or clay to slate, cedar or clay tiles.tiles.
Warrantee of 50+ yrsWarrantee of 50+ yrs Resistant to elementsResistant to elements Highly recyclableHighly recyclable Affects on water Affects on water
quality?quality?
Solar ShinglesSolar Shingles
~$36,000 for 300 sq. ft. of solar roofing~$36,000 for 300 sq. ft. of solar roofing Provides ~80% energy needsProvides ~80% energy needs $114/ 17 watt shingle, 12in x 86.5in$114/ 17 watt shingle, 12in x 86.5in Perform as well as conventional shinglesPerform as well as conventional shingles 20 years of power output20 years of power output Oksolar.com , Atlantisenergy.org Oksolar.com , Atlantisenergy.org
Corrugated Metal RoofingCorrugated Metal Roofing
Can last a lifetimeCan last a lifetime Non-renewableNon-renewable Highly RecyclableHighly Recyclable Exposed-screw fasteningsExposed-screw fastenings Lining can rot awayLining can rot away $150/square installed$150/square installed
Standing Seam RoofingStanding Seam Roofing
Lasts a lifetimeLasts a lifetime Non-renewable, very recyclableNon-renewable, very recyclable Covered fastenings, highly weather-proofCovered fastenings, highly weather-proof $350/square installed $350/square installed
Cost Lifetime
Maintenance Recycled Content
Recylability Other Benefits
Living Roofs
$500/square$500/square 40-50 yrs
Lots Partial Some Thermal performance, habitat, air purification, hydro cycle
Asphalt Shingles
$40-$150/square
25-50 yrs
Little Up to 25%
Not widespread
Cedar Shakes
$200-$300/square
15-30 yrs
Lots Renewable
Renewable
Slate Shingles
$900-$1200/square
70-100 yrs
No No Yes, reused Low processing, water quality
Recycled Content Shingles
$300-$600/square
50+ yrs No Up to 100%
Yes Impact resistance
Solar Shingles
$12000/square
20 yrs No On-site energy production
Corrugated Steel
$150/square 30 yrs Little Up to 50%
Yes
Standing Seam
$350/square 50 yrs No Up to 50%
Yes
Bibliography Bibliography http://http://www.greengridroofs.com/Pages/projects.htmwww.greengridroofs.com/Pages/projects.htm http://www.graceathome.com/pages/downloads/TriFlex_Brochure.pdfhttp://www.graceathome.com/pages/downloads/TriFlex_Brochure.pdf http://www.isola.no/http://www.isola.no/ http://www.graceathome.com/pages/http://www.graceathome.com/pages/
roofingprod.htm#I_AND_W_SHIELDroofingprod.htm#I_AND_W_SHIELD buildinggreen.combuildinggreen.com http://www.bobvila.com/ArticleLibrary/Subject/Roofing/http://www.bobvila.com/ArticleLibrary/Subject/Roofing/
Flashing__and__Sheathing/Underlayments.htmlFlashing__and__Sheathing/Underlayments.html http://www.interwrap.com/Titanium/titanium-index.htmlhttp://www.interwrap.com/Titanium/titanium-index.html http://www.strongsealroofing.com/http://www.strongsealroofing.com/ greengridroofs.comgreengridroofs.com http://www.ci.seattle.wa.us/sustainablebuilding/docs/Roofing.pdfhttp://www.ci.seattle.wa.us/sustainablebuilding/docs/Roofing.pdf