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

How Living Roofs WorkHow Living Roofs Work

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

Solar ShinglesSolar Shingles

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